Shell

http://blog.csdn.net/shuanghujushi/article/details/51298672During the bash Shell's use, there are a number of string manipulations that are often encountered, and some of the individual usage summaries are summarized below.First, the definition of a

Tag: Shell script if statement Yang Shufan Shell $?In a simple shell script, each statement is executed sequentially in order to automate the batch process. However, a single sequential structure makes scripting less intelligent and difficult to

function Instead_include (){Sed-i "S/\-i. \/.. \/export\/voiceconvlayerheader/\-i. \/voiceconvlayer\/include/g "$}Instead_include Application/debug/makefileInstead_include Application/misc/makefileInstead_include Application/voice/makefileHG revert

When doing performance testing, Linux server often generates a lot of data, such as log information, picture information, file information, and so on, after a period of time, causing the server disk space is full and crash, daily manual cleanup more

I. Script pre-run simulation environmentdr:server1:172.25.29.1 Ipvsadm keepalivedrs:server2:172.25.29.2 ARPTABLES_JF httpdrs:server3:172.25.29.3 ARPTABLES_JF httpddr:server4:172.25.29.4 Ipvsadm keepalivedInstall Server1, Server2, Server3 software

A. Trap1.trap is a shell built -in command used to specify how signals are handled in the script. For example, pressing CTRL + C causes the script to terminate execution, in fact the system sends a SIGINT signal to the script process, and the

Sample Resource Listsuch as Url.txt:http://su.bdimg.com/static/superplus/img/logo_white_ee663702.pnghttp:// Su.bdimg.com/static/superplus/img/logo_white_ee663703.pnghttp://su.bdimg.com/static/

A basic Bash shell command (based on Ubuntu implementation) The/etc/passwd file contains a list of all system user accounts and basic configuration information for each user. Man commandEnter the man command before the name of the tool you want to

There are n kinds of methods, awk, sad, grep, cut ...The above several ways do not write, just write two less commonly used to.Say less nonsense, directly on the code:Cat a.txt aa.gif=aaaa.gifbb.gif=bbbb.gifcc. gif=cccc.gifMethod One:#!/bin/sh while

Shell Basic OperatorsThe Shell, like other programming languages, supports a variety of operators, including: Relational operators Boolean operator String operators File Test Operators Native bash does not support simple

#SHELL编程基础一 (Multiple method evaluation 1+2+: +100)# #为什么要学好shellShell scripting language is an important tool to implement Linux system management and automation operations, and the core of Linux system and basic application software mostly involve

Regular expressions^ Start tag$ end Tag[A-z][A-z][0-9]. Single arbitrary character* Number of previous character repetitions >=0+ Number of previous character repetitions >=1？ Number of previous character repetitions 0 or 1{N,m} The number of times

Tagged with: Expect test shell strong analog Linu display binary comSometimes the script is executed with an error:SH -x test. SH + $'\ r': Command not foundtest. SH Panax Notoginseng fileThe reasons may be:Text editing is a file written in Notepad

This article directory:1.1-Bar expressionUsage notes for 1.2 test and []1.3 [[]]1.4 Usage RecommendationsTest can be used for testing expressions, including: string comparisons, arithmetic comparisons, file existence, attributes, types, and so on.

Note: To use this shell, you must first successfully establish the MEMCACHE Environment 1 "memcached File and permissions [[email protected] ~]# Touch/etc/init.d/memcached[[email Protected] ~]# chmod +x/etc/init.d/memcached2 write memcached Shell

#!/bin/bash[ -d /usr/local/zabbix ] && echo  "/usr/local/zabbix  Exist " && exitif ps -ef | grep zabbix_agentd | grep  -v grep ; thenecho  "Zabbix agent is installed" exitfiyum install -

One, if statement, while, for loop a variety of small examples1. User authentication[[email protected] ~]# cat buer.sh #!/bin/bash#user= ' buer ' #password = ' 1234.com ' read-p ' please your name: ' Userread-p ' pas Sword: ' passwdif [$user = '

1. load the configuration file sequence during the Linux login process:/etc/profile→/etc/profile.d/*.sh→~/.bash_profile →~/. BASHRC →[/ETC/BASHRC]You can view the default ~/.BASHRC file as follows:[Root@~/wade/codereview/redis-2.8.17Cat ~#. BASHRC #

Shell:m3u8-->ts Requirement: Known bulk m3u8 uri for full TS file uri #由于sed不支持文本替换, generate temporary files test_file#curl -s  ignore the default output as follows #  % total    %  Received % Xferd  Average Speed   Time    

Often encountered in the file has a duplicate record of the scene, either remove duplicate records, or count the number of duplicate records, these simple functions can be implemented through the Sort,uniq combination of shell commands,For example,