28 black
general servant in the circumstances under which alcohol? Most gathering of friends to talk to the excited, or what happened to stimulate people event,
such as love, falling out of love, fortune, bankruptcy ..
must shadow want so late, but also no party BOS
SSLiu to find their own drinking, by any stimulus, after all, colleagues
a, or should take to straighten him, so Pidianpidian he went downstairs to the stalls.
the BOS
SSLiu a loud voice, Wu gas bottles of beer, a dish of boiled peanuts, two grilled fish. Today is the day the two of them last collar
“living allowance”, the BOS
SSLiu is particularly generous, the tone of his à la carte as Wu boss, to San Taiwan
wine, cut pounds of beef or Kung “warm bowl of wine, this is cash, the wine is better”. Must shadow decline
drinking with him, the bandits they are allergic to that stuff travel time and there have been a painful lesson, the BOS
SSLiu not know,
more decline the BOS
SSLiu more think him not to face, or hidden, the more he drank.
so drink drinks upon which there are a lot of sense, such as drunk people always says he not drunk, not drunk but kept saying
drunk drunk can not drink. Said: “This technology, I would not, did not come into contact with.” Other people would rather say: “You would
is reluctant to say that!”
Finally let the absolute shadow adhere to the principles, the BOS
SSLiu to the point of bottles of soy milk.
two seated absolutely Shadow said quietly: “Well, what happened?”
“Nothing, it is drink.”
later must shadow know, the BOS
SSLiu is very ordinary people do not like is like nothing when drinking, of course, friends gather
stimulation, he will drink, but still nothing to drink mainly. Habit and he likes no
things to write programs similar. Most people when writing programs, he likes to write a program does not work when
his work is to write programs.
the BOS
SSLiu, alcohol and ordinary people is not the same, it is generally a few glasses of wine down, liquor up, began to boast, that is,
so-called “let go”. The BOS
SSLiu, two bottles of beer down like a sip of two tea, calm, still calmly
must shadow, said: “You obviously do not know, write a program, originally, but I have sideline, I had the real main industry is to play chess then
in Chess even put two dozen disk, killing them crap out of a lost soul .. “
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“That being the case, why you do not play chess?”
“you obviously do not know. chess, most people, after all, is entertainment, you want to Chess chess up your next
100 dollars a few sets people Mo clearly the end of your no longer with you under. chess will be so many people, most
everyone Mo Qing your bottom, no one under even into the professional team, the subsidy is so much in this life
there is no opportunity to turn around, people would be finished. “must shadow
think these words indeed have a point to when high school became well-known literary, but also self-proclaimed” painter-poet of XX –
“, but still at school in a bigger way to get together a literary community, the gall to be deputy secretary of the Federation of Literary and Zhang personal letter can
came to the University a stormy night in the freshman, he super- thin by 5 dollars, go downstairs canteen to buy a 10 scattered
smoke – Hongtashan, bedroom lights, bandits, they have to sleep, boil more night to write an article: “I and the computer
had school the only one first prize, took 50
00 bonus, almost joined the Writers Association. Since then, he decided to stop writing.
others do not know why, he knows: you an article from the pen to paper writes changes to the modifications to the Post to get the royalties arguably
that is Exhausted. May be that the royalties is a top day of a word for a dollar, that money not to mention the support the family, even the tobacco
fees may have to make do not come back. Besides, the network is developed, casual 11-year-old baby was a point a few hundred words “India
like to send article to the online dare you a compete, in vain you read then many books, so many allusions head is full of astronomy, geography,
knowledge, that are not useful.
so he still felt good to write programs. At least to learn to write programs, are not like writing articles, as long as you speak, called to say write
article. And write the program income is also quite good, although it reflected in the company is not so obvious, but 50 lines
10
00 ternary linear regression procedures have strengthened his belief.
must shadow so I thought that the BOS
SSLiu went on to say: “I the biggest wish is to write a chess program, you know,
chess program is the most critical is the situation judge the merits ..
say, must the film also reminds studied genetic algorithm, so then he said: “If I could genetic algorithm used inside
face opinions on cool so that you can simplify a lot of computing. “
Speaking of the genetic algorithm, after several years must Cinema think there is no white research, his” research “is limited to” know “, after casually
others talk about what he can say : “If the genetic algorithm can be used like inside.”
others said: “S
SSR is too complicated.”
He said: “If the genetic algorithm can be used like inside. “
others said:” The image recognition technology is too complicated. “
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He said: “If the genetic algorithm can be used inside just fine.”
others said: “This three-dimensional reconstruction technology is too complicated.”
He said: “If I could The genetic algorithm is used which is just fine.
anyway, others do not understand genetic algorithm, even to understand, it is limited to “know”. He stresses the “genetic algorithm” as if speaking Avenue
management, as if to read the “Heart Sutra”: “Mantra, Mantra, a Supreme Mantra, is no and so on curse …”
the BOS
SSLiu satiate, he stood up and very generous to shout: “Boss! pay!”
This is a typical Sichuanese character, even if it is hot and sour bowl of a dollar powder, after eating should carelessly shouted: “the boss!
pay!”
must shadow go and pay a BOS
SSLiu pushed. Later, on any occasion must shadow will always be rushing to pay alone does not grab
BOS
SSLiu, because then a lesson he knows he robbed not win him. Obviously two people are poor, the body may
paying the money without his age and more, are also rushing to pay, do not know if this is not the programmer habits.
The next day they still sleep downstairs nursery put “us” only to get up, that is a quarter past nine on time. The company provides nine
minutes go to work, they both always put “us” get up, if not the sound is too big they awakened perhaps
also sleep.
school thing had been settled, and Zhou allow them to put all thoughts are on the acceptance of the May Day CASE up. 51
Festival has been a long time, the CASE but until now there medical director of radiology, almost every day a phone call, the BOS
SSLiu responsible
do registration workstation, and must do shadow The image acquisition part KIPACS, original KIPACS in the image acquisition function too
perfect BUG addition of absolute shadow had to re-do, is doing the cursing before the programmer.
the BOS
SSLiu, has been because of the multi-threading technology in their KIREGIS triumphantly, but KIREGIS always
Ministry of testing within the company, he said: “This is where the company data, simply can not reflect the superiority of the multi-threading technology. my KIREGIS design
capacity is 100,000 level data! “
waiting for the day is hard, and finally one day, Zhou said:” Liu Today we went with X
XXX Hospital, the first software
all put something, their machines have been put in place. small absolutely, you need not at home to rest. “
This is the BOS
SSLiu, looking forward to. Busy he went on to say: “must shadow you go home and rest, this time I go, should
The no problem.
Must shadow home, did not expect the Majoring today also came to the . Originally, they have not a holiday, here are far from the school, she usually rare
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take a trip to this also Shunpian Mai dish is cooking, in this case, the most romantic thing than from behind around her
waist of said: “My dear, you are hard.” can never film happens to understand romantic, he was thinking about the installation essentials in KIPACS do not know
the BOS
SSLiu listen to the inside did not. Had wanted him to write a document, the BOS
SSLiu feel the waste of time, he said a few
points, he also has been tinkering with KIREGIS there do not know that he heard of any, since his last The is Paizhexiongkou absolute shadow hit
Paul votes.
meal Yan r, he said: “Today the company to install the software, I am busy for so long, weeks always make me come back to rest today,
estimated now he and BOS
SSLiu, still in the hospital today at home, I do not work, have fun with you. “Then just finished must
shadow worst fears will occur. Week phone call came, saying: “test KIPACS you? How video here
do not come?”
Must shadow one on the anxious, KIPACS capture video is absolutely no problem is certainly what has gone wrong in the installation, he
patiently to speak again loaded essentials Zhou: “bin” directory of things copied into the installation directory and then run should
regist bat registration capture card, ocx and reporting format, then install the capture card drivers, add a KIPACS
data source in the DSN, the driver is “MSAc
cces
ss file to point to “DB” directory KIPACS.mdb. Finished, he carefully
wing test Road: “Or I take a trip.”
“Ah, you take a trip over the taxi.”
One week say that the absolute shadow and pissed off. As early as you want to that I say so more than the essentials ass to use ah. Or you straight
then let me take a trip, or you listened to the essentials of the installation, not let me. This Bi Mingming signpost has been
indicated the “lifting of the 60 km speed limit, you drive 70 km, the traffic police brush is a ticket. You get off pointing to the sign
patient said: “police comrades, had been lifted to 60 km limit it.” The traffic police nodded thoughtfully said: “Yes.
You e right on it, “he said you think OK fine just want to turn on the car, but he changed the subject:” But the tickets are already
opened the next time, next time without penalty to you. “That fucking matter, next time, next time my speeding when you do not know where to go.
Yan r hear the their phone,
absolutely Shadow said: “You better go, go early to come back early, have been ten o lock next accompany
me.” So He filled Yan r guilt taxi to the hospital. Really is installed, the earliest KIPACS with SDK20
000
capture card, but what effect is really bad, the requirements of this hospital is high, so replaced the SDK30 of
000. Specifically in order to replace absolute shadow
rewrite the code in the capture card, the original the ocx development programmer, and made like the VB
This is the most taboo, so all of his into the API call. I did not expect the BOS
SSLiu wise at all times, and happens to
loaded the one SDK20
000 driver. The driver is not installed right, the video can not get out, they blame must shadow the program is not written. This is a small problem for them
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Two minutes, never shadow can resolved in respect of such a small problem has to absolutely shadow of the night
taxi 10 km of went to the hospital. Absolute shadow, usually the night taxi 10 km to solve this little problem is
little problem today, Majoring still at home waiting for him, it is a major event. They can never understand how
thing for him.
another drive, KIPACS really up and running as smoothly as the company test environment. Must shadow pat on the BOS
SSLiu , shoulder
said: “Young man, next time pay attention to the point!” The implication of these words: “this problem is not me, I wrote Cheng
sequence, how to be a problem? “look back at the week total, he did not let the mean of the absolute shadow back, it seems that his last
hint of fantasy did not happen, think about anyway, so late, have been out back Yan r or his views,
with them out again and again to go home forget.
night, must affect three points only to go home, Yan r had fallen asleep.
once again go to the hospital the day of acceptance. Director of radiology rush. Hospital top leadership to inspect, collar
guide is not satisfied, the responsibility is certainly the director of the head, under the responsibility of Director of again on the week total head, under the responsibility of Zhou again into the BOS
SS
Liu and must shadow the head, so must shadow them running around in circles. test the effect of
KIREGIS, or satisfactory, the BOS
SSLiu smooth all the way to leading performers how to register here register
how the data raised from the X-ray machine, how to increase from CT out. The KIView test with good results,
weeks overall responsibility, the software had gone through the test of mature products, mounted directly on the line. Come X-ray machine, Zhou chest
bamboo said: “Here is KIPACS workstations, it is read from the KIREGIS database registration records, TH60
00 shooting
image digitized and converted to DICOM images, image processing, and then print the report directly, shooting film
can print directly to the contracting below to demo the use of process by the company is small absolutely. “
must The film also confidently walked over from the front desk, access to records, X-rays until the image
tune window into KIPACS him to start the presentation. The transfer window this is a professional radiologist, he will naturally understand, only random value for the window condone window to greatly adjust the image
followed by a substantial change up. Hospital head ready to nod, when, suddenly, the screen is black.
29 C and
the ASM
see a black screen, never the shadow do not know how, never in the company test when this happens anyway, certainly,
program out of the problem, it is bad or full-screen image and one black, the whole screen is black. The corner of more than
the light Piao Liaopiao weeks total, but fortunately, Zhou is with great interest to doctors the introduction KIPACS is how good the hospital leadership
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found a problem. He rushed to exit full screen turn off KIPACS, open again.
hospital leadership is going to speak, must shadow rob said: “This is a normal phenomenon, general KIPACS with a long time is necessary to restart the
” That implication is: “this black thing in front of him, did not Han a big deal, we already know. and it can not
resolve the to be able to solve and we do not already solved. such as mobile phones, even NokiaN95, enough high-grade it,
But you could get it put DVD? not put, or will use it so troublesome to you occasionally restart it.
week total to listen to him say, come back to, Zhangerhushang Mobuzhaotou.
last hospital leaders in the acceptance report signed word, to withdraw the company of a pedestrian, Zhou asked: “small absolutely, ah,
KIPACS restart the case? how heard You said that?
must shadow dare to speak the truth to him, and quickly said: “no big deal, go back to my research, is estimated there are some small BUG.”
company CASE Although the company requires the discovery and correction of all the BUG should be the ultimate expression of software development documentation
But the reality is often the programmer found own BUG hide down, conceal down myself to draw
top injunctions to eliminate the security risks, but the accident total to happen, although the added accident to truthfully report
remedied, but the bosses is able to hide do not report on it hidden, and their own private deal with trouble. You want true if the truthfully on
reported a small coal mines in 12 months a year, they reported more than 20 accidents go up next year mining license how might take
to?
said absolutely shadow is small, and returned to the company and saw half a day are still not understood, the problem lies in the tune window principle of the tune window
simple point of fact, some properties of the image briefly, then re-draw to the DC to minor adjustments did not ask
title is significant for a long time to adjust the final part of the image will be black out. He first thought it was a WM_PAINT message at
management, this is too much trouble, the system often have to send the WM_PAINT this message, in which the next breakpoint or
in Mes
ssageBox on has been to keep the pop-up. So now we still can not find what they were. You want is really a problem with the news
processing, it should adjust the window early in the morning there will be problems fishes. the
debug the few times, must shadow system is becoming increasingly slowly, open the Task Manager, obediently, KIPACS actually takes 30
00
M memory. To know KIPACS just start but it only takes up 17M memory. It looks like a memory leak. Think so,
he continues to adjust the window, adjusting the memory go up can not any down, it really is the time of the transfer window a memory leak.
know Cause Solution we should much faster, the original did not use GetDC to obtain DC ReleaseDC to release it,
part in the WM_PAINT message, the WM_PAINT message frequently sent, so that memory leaks so awful quite.
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plus the ReleaseDC, KIPACS finally able to smoothly adjust the window to see the Task Manager The memory occupied by the basic stability in the 20M.
engage the end of this BUG, ??must shadow look at the time, is already more than 21:00, the company early do not know when it is all gone.
things still must shadow left a profound lesson that very often a period of time, someone asked him: “shadow head, you see
this program, how is always a problem ah? “he would tell people that:” the first to see if there is a memory leak.
problem to solve, the total came to the company wait until the next week, and the absolute shadow lightly Zhou said: “Yesterday that KIPACS need to restart
I have solved a small problem, a memory leak. “
so what hat and no cattle. Obviously yesterday spent five or six hours of writings to the almost desperate to finally solve the problem now
in the veterans in front of an understatement to say: “a small CASE.” Would like the BOS
SSLiu may also be the case, they do not know
Road boil for a few overnight brain cells to kill I do not know how many finally to make more than one thread out, it said in passing that:
“multi-threaded Well,
not easy. twenty or thirty minutes to engage two people are boastful, like their own ability very, very large, even
what technology ah method ah algorithm solution is not everything under control in the original that the cattle so blown, we decided
how great the results of the last to suffer their own, happy is the boss, bosses took advantage of this mentality, he
they would say: Yes Yes, such a big problem so quickly, this program there is also more than 20 BUG
small problem, give you a day enough of it. “
weeks the total must shadow reflect more concerned about, he said: “memory leak problem is widespread, this problem
worst debugging. I l give you a software BoundsCheck, specifically testing memory leaks
in the past, never film is definitely not going to care about what software to be introduced, first, that the software is to be introduced, but also unfamiliar
noted software it really good, how to use must to explore, especially the this BoundsCheck one knew it was England
text version of the software, but also to take Kingsoft to translate the menu or online around looking for the finished version, originally thought of using this software
very earth to raise labor productivity, result, they spent the time learning far more than it increases labor productivity, this
called “Brothers missed the cut firewood.
the absolute shadow or more careful, yesterday to solve the problem but really put themselves too painful, thanks to yesterday opened
Task Manager found the problem, or maybe the code tracking to the Pacific do not know where the problem lies.
go online to the next BoundsCheck6forVC, turned out to be famous Numega company, would like to be able to SoftICE
kind of software company out of things can leave you? For example, Microsoft announced a new operating system, it will not
become the headlines of the major sites. So not only is the clothes, the software also has a brand.
day in the company but also research all day, never shadow the first time that the word “purification”. After each week, always said: “OK, and
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Tomorrow we Purification.” Absolutely shadow just as we translate: “Well, tomorrow we purified test not installed
BoundsCheck installed to BoundsCheck, it will not use me.”
recent days, the BOS
SSLiu the company is quite proud of, it seems very satisfied with the hospital KIREGIS test run, you want him to change his place
. KIREGIS the code has been the BOS
SSLiu in charge, must shadow never to see or the world happiest
things over to someone else others do to you actually exactly the same and your requirements, there is no need to change.
Have nothing to do BOS
SSLiu,, just devote themselves to research from the C
to.
had a lot of things are like to do easy to do, say this C
Even if you write five or six programmers,
function template. class template, pure virtual function and virtual base class of these things you were using the number of BOS
SSLiu study this
things, plus on KIREGIS in the hospital made a success, I feel almost the furnace has to, must shadow merely mediocre, not
is the compilation of better ? Again, compilation, however 10
00 multiple instruction, is not so difficult.
must shadow he always thought that C
should be limited to the “theory”.
the two met, the BOS
SSLiu asked: “Do you know the X
XXXX base class constructor will be invoked several times?”
absolute shadow knowing certainly answer is not up, the best is not going to answer in this case, the BOS
SSLiu is, come prepared deliberately making things difficult for you
, not with advice, so even if you are lucky correct answers, but also and can not let you admire the feeling wells up; To
you are wrong, on the middle of his wants, then on any technical discussion, he will always take the “X-
XXXX ask
title do not know, said a P! “to pressure you.
As Lu Xun said, a life to a child, you say: “This child is okay, and later when what high official in the number of
how much money you is a lie, you can people parents want to hear. You say: “This child will eventually die.” This is the truth, pleasant father
mother do not want to hear. How to do, you better say: “Oh, this child .. you see .. Oh .. ha ha ..”
so must shadow to avoid the focus of any problem, also started to come: the C < br /> ? research? I tell you, C
can be done, the assembly can be done. assembler can do that C
, and some can not do Oh. “
This is absolutely the shadow of the killer. First transferred to the assembly up. This respect, he accumulated several years, be regarded as a connoisseur.
Then indeed self-positioning and accurate calculation of the code length of the two technically only the assembly can be done, which is the bane of high-level language.
cares what language to use these two points, he can kill it.
BOS
SSLiu very convinced and said: “I know that assembly, under Windows, but is replaced by he invoke to call the API
nothing can fool me. the BOS
SSJue, you go to major companies look at your stuff out of date. “
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“I know that I know can you stuff soon even the existence of no value I ask you, unless you engage in the virus, but also have
assembly can do high-level language can not do? “
turn a must shadow a military, each with the others, said:” I Well, good compilation. “fear most people ask:” Do you engage in the virus? “
others say this is like saying:” You really look like a thief. “So every time he have to tell that a lot
what assembly does not necessarily engage in viruses, in addition to engage in virus assembly, what purpose, but also what to write programs. Want half
days, must shadow really can not remember the assembly there is any advantage, but a silence which is to admit defeat, From then on, the the BOS
SSLiu, on
sense of the word in front of him showing off C
, then on their own, and assembly language in the company, then no status. Please urgency as
, he suddenly thought of the University did when large numbers arithmetic library, finally triumphantly: “Who is useless, I have
a C
do large numbers arithmetic library algorithm intact translated into the compilation of the operator of multiplication speed of 1024 actually increased 20
00 times.
I assembly, you can save most of the operand to register , poor C
ah, have to keep all into memory
senior operator or go side to rest. “
he had finished talking, the BOS
SSLiu silence. This is the theoretical arguments and factual arguments are full. Originally compilation speed Needless
doubt, coupled with absolute film written procedures where the BOS
SSLiu, where barge barge not fall. See he did not speak, never in a big shadow
to their own table to sit, thinking to himself: “told me the C
I assembly takes all.”
Probably had 10 minutes, the BOS
SSLiu suddenly jumped up and said loudly: the BOS
SSJue I almost let you fooled by, just forget
Hutchison the CACHE. the CPU now has a CACHE CPU almost the speed of access and register in CACHE C
will put through
frequently used variables CACHE inside, the speed should compile almost fishes. “
must photocopy to think that you can sit tight Diaoyutai had, I did not expect the BOS
SSLiu is that the sight of coffins were moved to tears the people, listen to him
or reasonable, at least in theory, should he went on to explain not 20
00 times faster in practice,
no theory as a basis, that is far-fetched to talk to the BOS
SSLiu, explain also placed himself in this debate very
Lee position. Finally, it must shadow was silent.
from that debate after the BOS
SSLiu never give absolute shadow boast C
, there is no boast in the C
attainments How
deep. The film must also not in the BOS
SSLiu front showing off assembly how omnipotent own compilation of how consummate. Both heart
know belly out, they both general level, I continue in a language which one is better on the controversy, who did not certain of winning, if you lose
face lost big. Not as good further education a few years, when assessed by
many years later, the film must finally thought had no idea the problem: assembly language to use register is not on the register access
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memory access faster, but faster memory addressing register addressing. Very often he wants to tell this to the BOS
SS
Liu-but he finally did not tell him.
Fast forward two months in the past, must shadow and BOS
SSLiu, go to the hospital of their software system made of two routine maintenance and updating, the hospital
fairly large scale, the registration data has been There are more than 30,000 KIREGIS withstood the endurance test. KIPACS basically run after two updates must
shadow relatively stable. In the paychecks of the time, Zhou, said: never shadow of XX
Hospital XX CASE experience,
pass this month to send you $ 50
00 bonus because the CASE the income is not on of you KIPACS contribution
, so the prize money will you have other people do not quiet. “
must have been shadow feel the CASE busy so long before The total bonus of $ 50
00 weeks is really buckle the door, but listen weeks so
must shadow heart with a smile out of his office, and wait for them to immediately publicly declared loudly: “You know ? XX
XX hospital project
bonus 50
00 yuan, I never shadow a person! “
BOS
SSLiu also into the office. Zhou said: “The X-
XXX Hospital, CASE acceptance, this month sent to you 50
$ 00 bonus. Because CASE income are not many of you KIREGIS the largest contribution, so the prize money will you have, its
it not quiet. “
Of course the BOS
SSLiu, when out of also can not wait Lima in public loudly announced:” ? of XX
of XX hospital project bonus 50
00
the BOS
SSLiu
a two After receiving wages, face both beaming.

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Check with your thumb, since of T1 ~ of T12 each spinous top of sequence one by one check,
spinous process end to side to move within a square sliding press, to check the tender point or before and after displacement
situation; or with the index finger and middle finger from top to bottom or bottom-up along the spinous process slide
to be investigated was the spinous process skew or not.
because thoracic side of the spinous process for the trapezius, the large rhomboid muscle (T1-4 spinous process),
serratus anterior muscle, semispinalis, and more split muscle (C2 ~ L5, spinous process), the rotation of vertebral muscle (C2-
S the spinous root or vertebral arch) attachment of soft tissue strain lesions,
occurred mainly back pain, back heaviness, hair tight sense of cold water poured back a sense, the back is not quite
onwards the embolism as Each spinous process pain and dorsiflexion muscle strain, pain in the spinous process often belongs to the ribs to the chest radiation, can be formed in its costal cartilage at the sensitive point of tenderness, along

< br /> is often mistaken for costal cartilage inflammation, the long rule is invalid. The most common left T5 spinous process pain,
forward chest sternum in vitro side 5 costal cartilage at the radiation, the formation of sensitive tenderness
point, often diagnosed as “crown heart disease “and” heart area pain. ” Leads to pain when the examiner first-hand thumb
Press the left chest T5 costal cartilage tenderness point, and then the other hand thumb to press the sensitive point of the left T5 spinous process tenderness in the back of the
would enable the former chest rib cartilage tenderness
disappear immediately. Stop the back of the T5 spinous process of the press, the tenderness of the costal cartilage of the legislation
that reproduce. Soft tissue release surgery through the left T5 spinous process can indirectly eliminate the costal cartilage
tenderness, further evidence of the pain of the back and front chest two very clear causal relationship
.
6. Palpation of the thoracic spine dorsiflexion muscles
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check with the thumb along each of the lamina deep pressure, and horizontal sliding press, check
point tenderness or nodules, cords. Generally in the T5, 6, T8, 9, or the T11, 12 lamina
at the tenderness is most sensitive to.
thoracic spine spinous process dorsiflexion muscle strain, there will be back pain, back heaviness,
tight for a sense of numbness, cold water poured back a sense, back quite can not afford to embolism like.

recorded anonymous users download directory, this directory need to empower the root of the chmod 1777 pub (special
special permission to upload can not be deleted)
/ etc / logrotate.d main log file / vsftpd.log Vsftpd
vsftpd configuration file / etc / vsftpd / vsftpd.conf description
and Linux systems (modified before the backup) Like most of the configuration file, the vsftpd configuration file # start a comment.
# Allow anonymous FTP server, the default is set to YES to allow
# users can use the user name ftp or anonymous ftp login and password for the user e-mail address .
# does not allow anonymous access is set to NO
anonymous_enable = YES
# whether to allow a local user (ie the user account in linux system ) to log on to the FTP server, the default is set to YES to allow
# local users to log into the user home directory, and an anonymous user logs into the anonymous user download directory / var / ftp / pub
# if only to allow anonymous users to access, preceded by # commented out to prevent local users to access the FTP server

local_enable = YES
# whether to allow local users have write access to the FTP server file, the default is set to YES allows
write_enable = YES
# mask local user default mask for 077

# You can set the local user file mask for the default 022, based on personal preferences can be set to other values ??
# local_umask, = 022
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# whether to allow anonymous users to upload files, should be the overall write_enable = YES . The default is YES
# anon_upload_enable = YES
# whether to allow anonymous users to create a new folder
# anon_mkdir_write_enable = YES
# is activated directory welcome message function
# CMD mode for the first time to access a directory server, FTP server will be displayed to welcome information
# default , welcome information is obtained through the message file in the directory.
# This file save a custom welcome message by the user to establish
the # dirmessage_enable = YES < br />
# let the system automatically maintains a log file upload and download
# default the log file / var / log / vsftpd.log can also below xferlog_file option to be set
NO # The default value is set

xferlog_enable = YES
# Make sure the PORT transfer connections originate from port 20 (ftp-data).
# set the FTP server will enable the FTP data port connection request
# ftp-data data transmission, 21 for connecting the control port
connect_from_port_20 = YES
# set whether to allow the owner to change the upload file, and following a set used in conjunction with
< br /> # Note, do not recommend using the root user to upload files
# chown_uploads = YES # set the upload file that you want to change the owner, if necessary, enter the user name of a system Generated by Foxit PDF Creator @ Foxit Software
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the
# chown_username the = whoever
# set system maintenance record FTP server to upload and download log files
# / var / log / vsftpd.log is the default, and can also be a separate
the # xferlog_file = / var / log / vsftpd.log
# standard xferlog format written transfer log files
# defaults to / var / log / xferlog can xferlog_file option to set
# The default value is NO
# xferlog_std_format = YES
# The following additional configuration option will be enabled to add the appropriate settings
# generate two similar log file < br />
# default in the directory / var / log / xferlog and / var / log / vsftpd.log
# former is wu_ftpd type of transmission log, you can use the standard log tools analyzed; the latter the vsftpd kinds log
# dual_log_enable
# whether to the original log output to / var / log / vsftpd.log, output to the system Log
the # syslog_enable
# set the data transfer interrupt interval, this statement is idle user sessions interruption time to 600 seconds
# that is, when after the data transmission, users connect to the FTP server should not be more than 600 seconds. According to the actual situation of the value of repair
reform the
idle_session_timeout = 600
# set the data connection timeout, the statement said data for The connection timeout is 120 seconds, according to the actual situation to modify
# data_connection_timeout = 120
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# run vsftpd non-privileged system users, the default is nobody
# nopriv_user = ftpsecure < br />
# whether to recognize asynchronous ABOR requests.
# If the FTP client the async ABOR “will be issued this command, this setting is enabled
# general this setting is not safe, it is usually Cancel
the # async_abor_enable = YES
# transmitted in ASCII mode data. By default, the server will ignore the request of the ASCII mode.
# Enabling this option will allow the server to transfer in ASCII mode data
# However, this may lead to DoS attacks due to a “SIZE / big / file” < br />
# ascii_upload_enable = YES
# ascii_download_enable = YES
# log into the FTP server welcome message
If the necessary, change directory welcome information directory created called the message file and write to welcome the information is saved
the # ftpd_banner = Welcome to blah the FTP the service.
# blacklist settings. If you hate a certain email address, you can use this setting to cancel his permission
# withstand some special email address.
# deny_email_enable = YES
# When the above deny_email_enable = YES, you can use this setting to the provisions of which e-mail address can not log on the vsftpd

server
# This file is required the user to create their own line of an email address can
# banned_email_file = / etc / vsftpd / banned_emails
# users to log into the FTP server has access to your directory other than the file permissions
# set to YES, the user is locked in their own home directory, the vsftpd will in the following chroot_list_file option value < br />
position to find
chroot_list file # must be with the following settings meet the
# chroot_list_enable = YES
# is listed into this file the user in the registry will not switch to their own directory outside the directory
# conducive to the security and privacy of the FTP server. This file must be created
# chroot_list_file = / etc / vsftpd / chroot_list
# whether to allow recursive queries. Off by default, to prevent the remote user to cause excessive I / O
# ls_recurse_enable = YES
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# whether to allow monitoring.
# If set to YES, vsftpd will run in standalone mode from the vsftpd own monitor and deal with the IPv4 port connection request
the listen = YES
# Set whether to support IPV6. To listen on both IPv4 and IPv6 port
# you must run two sets of the vsftpd, using two sets of configuration files
# while ensuring a listener option is commented out # listen_ipv6 = YES # set the PAM plug-in module provides authentication services used by the configuration file name, ie / etc / pam.d / vsftpd file
# This file file = / etc / vsftpd / ftpusers field, illustrates the PAM module is able to withstand the account from the file
/ etc / the vsftpd / ftpusers in
# pam_service_name = the vsftpd
# whether to allow users to log into the FTP server in the ftpusers file, the default is NO
# If this is set to YES, then the user user_list file allows FTP server

# If both set userlist_deny = YES, the user user_list file will not be allowed to log into the FTP server,
even the password hint information
# userlist_enable = YES / NO
# set the resistance pull users to log on to the FTP server user_list file, the default is YES
# userlist_deny = YES / NO

# whether to use tcp_wrappers access control as the host.
# the tcp_wrappers network services in the linux system based on host address access control
# in the / etc directory hosts.allow and hosts.deny two files with set tcp_wrappers access control
# the former set to allow access to records, the latter set to deny access to records.
# If you want to limit anonymous access to FTP server 192.168.57.2 certain host, editing the / etc / hosts.allow file, such as the increase in the
The following two commands :
# vsftpd: 192.168.57.1: DENY and the vsftpd: 192.168.57.9: the DENY
# that restrict IP access 192.168.57.1/192.168.57.9 host IP is 192.168 .57.2 FTP server
# The FTP server can PING pass, but can not connect
the tcp_wrappers = YES
The following content will some restrictions and access control options for further instructions.
In addition to these basic settings, we can also in the vsftpd.conf file to add more security options. Few
commonly used are as follows:
limit the maximum number of connections and transmission rate
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in the management of the FTP server, regardless of the local user or the anonymous user for the FTP server resources
need to be controlled control to avoid excessive burden caused by the FTP server is running exceptions, you can add the following configuration item control
FTP client FTP server:
< br /> 1. max_client set used to set up an FTP server to allow the maximum number of client connections
Without limiting the value of 0:00. For example max_client = 100 maximum number of connections for all clients of the FTP server is not more than 100.
2. max_per_ip set the item is used to set the maximum number of client connections allowed for the same IP address
expressed the limit value of 0:00. For example max_per_ip = 5
the same IP address, FTP client and FTP server to establish the number of connections is not more than five.
3. local_max_rate-setting is used to set the maximum transmission rate of the local users, in units of B / s, and table
value of 0:00 show is not limited. Local_max_rate for example, = 500 000 FTP server local users maximum transmission rate is set to
500KB / s
4. Anon_max_rate set the maximum transmission rate is used to set the anonymous user. B / s, a value of 0 means that does not limit
. For example ano_max_rate = 200000 FTP server anonymous users maximum transmission rate is set to
200KB / s,.
Specify the user permissions set
the vsftpd . user_list file with the vsftpd.conf configuration file to achieve a
file vsftpd.user_list
the specified user account access control:
(1) set prohibited login user account
when vsftpd.conf configuration file includes the following settings, the user account in vsftpd.user_list files is prohibited into
line FTP login:
>
userlist_enable = YES
userlist_deny = YES
userlist_enable settings set using vsftpd.user_list file, userlist_deny set to YES vsftpd.user_list file is used to set up user accounts banned.
(2) is set to only allow logged in user account
vsftpd.conf configuration file includes the following settings only vsftpd.user_list files user account to
FTP login:
userlist_enable = YES
userlist_deny = NO
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userlist_enable settings set vsftpd.user_list file, the userlist _deny settings for NO means

vsftpd.usre_list file only allows the logged in user account is used to set the file does not include user account banned FTP
login.

userlist_deny and the userlist_enable option to restrict users to log on to the FTP server (using the the userlist_deny option
the
and user_list of files together to be effective against the root, apache, www, and other system users to log on to the FTP server, so as to ensure the security of FTP
server classification). The following are the specific forms and two of the two options to use with the effect of:
Userlist_enable = YES
Ftpusers the user to allow access

User_list user
Userlist_enable =,
Ftpusers in, NO
user allows access to to prohibition user is allowed to access
User_list access


Ftpusers in user> Userlist_deny = disable access (login, you can see the password prompt, but still
can not access)
user_list prohibit access to the
Userlist_deny = NO
ftpusers in users are prohibited from access
user_list users allowed to access
Userlist_enable = YES and

Userlist_deny = YES to

Ftpusers in-user to disable access to
User_list users disable access (Login does not occur when the password prompt, direct server
refuse the)

Userlist_enable = YES and

Userlist_deny = NO

Ftpusers in ban users access
User_list
modify the default port
allow access to the default FTP server port number is 21, for security purposes, and sometimes need to modify the default port number, modify
/ etc / vsftpd / vsftpd.conf, add the statement (for example):
listen_port = 4449
statement is specified to modify the FTP server port number should be greater than 4000. Modified access to # the ftp 192.168.57.2 4449 Note here need to add the correct port number, or can not properly connected.
set up user groups Generated by Foxit PDF Creator @ Foxit Software
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Here is mainly a simple description of the user group technology, specifically, how applied, or the specific needs of a specific treatment.
# mkdir-p / home / try to recursively create the new directory
# groupadd the try New Group
# useradd-g try-d / home / the try try1 New User try1 and specify the home directory and the case of group
# useradd-g, the try-d / home / try try2 new user try2 and specify the home directory and the case of group

# useradd-g try-d / home / try try3 New User try3 and specify the home directory and the case of group
# passwd try1 password for new users
# passwd try2 for the new user password
# passwd try3 password for new users
# chown is try1 / home / try set the directory owner the user try1

# chown is try the / home / try set the directory is group to group the try
# chmod 750 the / home / try setting directory access rights try1 to read, write, execute; try2, try3 to read, perform
local users to log on to the FTP server to enter their home directory, home directory / home / try
try1, try2 try3 pairs assigned permissions via FTP access permissions different, try1 access permissions as follows: upload, download, built head
recorded; try2, try3 access rights to download, view, building the directory and upload. Achieve a group the different user access level
grading on the FTP server security management.
connection timeout
configuration idle user sessions to interrupt: the following configuration in the user session idle for five minutes after the interruption to release

server resources

Idle_session_timeout = 300
configure the idle connection interruption: the following configuration in the data idle connection 1 minutes after the interruption, also

to release server resources
Data_connection_timeout = 60
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configuration automatically interrupt and activate the connection: The following configuration will allow the client when the client is idle idle for one minute since
automatically disconnected automatically activated after 30 seconds the connection
Accept_timeout = 60
Connect_timeout = 30
Next, we will vsftpd log introduced.
vsftpd log to solve the program
the following definition of a log recording the vsftpd.conf:
# that the FTP server record uploading and downloading
xferlog_enable = YES
# that the uploading and downloading of records written in the file specified by the xferlog_file, namely xferlog_file options file specified < br />

xferlog_std_format = YES
xferlog_file = / var / log / xferlog
# Enable double log.
The # vsftpd_log_file the specified file uploading and downloading at the same time xferlog file records server, the / var / log / vsftpd.log will be used to record the server transmission situation
dual_log_enable = YES
vsftpd_log_file = / var / log / vsftpd.log
vsftpd two log files are analyzed as follows:
/ var / log / xferlog
record content for example
Thu Sep 6 09:07:48 2007 7 192.168.57.1 ??4,323,279
/ home / student/phpMyadmin-2.11.0-all-languages.tar. gz b-ir student ftp 0 * c
/ var / log / vsftpd.log
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Tue Sep 11 14: 59:03 2007 [pid 3460] CONNECT: Client “127.0.0.1″
Tue Sep 11 14:59:24 2007 [pid 3459] [ftp] OK LOGIN; Client “127.0.0.1″,
/ var / log / xferlog log file analysis of the data and parameters
record data
anon
password “?
parameter name
parameters
Thu Sep 6 09:07:48 2007
time

server local time, the format is:
of DDD MMM dd hh: mm: ss YYY

transmission time
< br /> transfer files with time, in seconds
192.168.57.1 ??
remote host name / IP
remote host name / IP
4323279 file size of the

send file size in byte / home/student/phpMyadmin-
2.11. 0-all-languages.tar.gz file name
transmission file name, including path
b
transmission type
The type of transmission, including two kinds:
a binary file transfer
ASCII transfer b special treatment signs
special treatment of flag, possible values ??include: do not do any special processing
C file is a compressed format
U file non-compression format
_ />
T file is a file transfer direction of the tar format
i
transmission direction
, including two kinds:
o from the FTP server from the client to client transfer
i transmission to the FTP server
r
access mode

user access patterns, including:
a anonymous users
g guest users
r real users, the system user
student
user name user name

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ftp

used the service name, the general FTP

authentication method
authentication methods, including:
no
1 RFC931 Authentication
*
to authenticate the user id
authentication the user id, if you are using *, you can not get the id
c
complete state of the state
transmission:
c indicates that the transfer has completed
i is the transmission shows complete
the common FTP commands and FTP numeric code meaning.
common FTP commands and their functions
FTP command
function
FTP command

function
ls
shows the directory on the server
ls [remote-dir] [local-file]

Display remote directory remote-dir,
and credited to a local file local-file
get remote-file
[local-file]
from the server to download the specified text
mget remote-files to the client

download multiple remote files (mget life
Order allow wildcards to download more
file)
put local-file
remote -file]
upload from the client to specify the text
to the server
mput local-file
Upload multiple files to the remote master
machine (mput command allows to upload multiple files with wildcard
)
open
connect FTP server

mdelete
delete remote-file] remote host file
close
interrupt
ftp session with the remote server (open
should)
mkdir dir-name

the remote host, create a directory
open host [port]
to create the specified ftp service
connected, you can specify connection

port
newer file-name
If the remote host in the file-name
modification time than the local hard drive
file a more recent time, the retransmission of the file

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cd directory change the server working directory.
recorded
rename [from] [ to] change on the client (local)

change the file name of the remote host
lcd the directory
change the working directory
pwd
display the remote host current work
directory
bye
to exit the FTP command state
quit
bye to exit the ftp session
ascii
set file transfer

ASCII mode
to ReGet remote-file
[local-file]
similar to the get, but if the local-file save
from the last transmission is interrupted at the continued
pass
binary
settings file transfer mode to binary mode of

rhelp [cmd-name]
request to the remote host help
[cmd [args]]
the local host interaction
shell back back to the ftp ring
environment, such as: ls *. zip
rstatus [file-name]
If you do not specify the file name is displayed far
Cheng host, state, or display the text
>
state
accout the [password]

successful login the remote system into password

need to hash
1024 bytes per transmission, a
hash symbol (#)
the append local-file
[remote-file]
local file is appended to the far
-way system host, if not refer to
given the name of the remote system,
use the local file name
the restart marker
from the specified flag marker at
re-get or put,
restart 130
bye
exit the ftp session
rmdir the dir-name
delete the remote host directory
case
use the mget command
< br /> file name of the remote host
uppercase into lowercase letters
size the file-name
the remote host file size < br />
such as:
size the idle 7200
cd remote-dir
into the remote host directory
status
ftp status
Use the cdup
into the remote host directory
parent directory
system
remote host operating system
delete remote-file
remove remote hosts file
user user-name
[password] [the account]
own body
, to the remote host that requires a password, you must Enter
password, such as: the user the anonymous
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my @ e-mail
dir
[Remote-dir] [local-file]
display remote the host directory,
store the result in the local culture

help [cmd]
ftp internal The command cmd help
help information, such as FTP digital code in the help get
meaning
110 Restart marker response.
120 Service ready in long time.
125 data link port is open, ready to send. 150 File status okay, open the data connection port.
200 The command completed successfully.
202 command execution failed.
211 System status, or system help response.
212 directory state.