Shell

I. Basic conditions of judgment1) Logical operators-A expr1-a expr2 logic and-O expr1-o expr2 logic or! !EXPR1 Logical Non-2) Numerical judgment-eq num1-eq num2 is equal-ne Num1-ne num2 is not equal-GT NUM1-GT num2 is greater than-ge Num1-ge num2 is

6. Script timed Tasks# Example of job definition:# .------------------------- minute (0 - 59)# | .--------------------- hour (0 - 23)# | | .----------------- day of month (1 - 31)# | | | .------------- month (1 - 12) # | |

The 1 script is as follows[[email protected] ~]# vim 99.sh #!/bin/bash # 9*9 Table # 2015.5.26 by Luzhi for i ' {1..9}do for J ' {1..9} do If [$j-le $i] then c=$ (($i * $j)) ECHO-E-n "$j * $i = $c \ T" fi do echo "" Done2 Operating effect650)

#!/bin/sh#count memory_used_rate,disk_used_rate # @yuanwb  2015-5  #disk_used_rate #depend  on real storage place the parameter  ' Location '  need to  Alter. location=/dev/sda1disk_used_rate1=$ (df -h | grep  $Location  | awk  ' {print $5} ') free1=

#!/bin/sh#count memory_used_rate,disk_used_rate # @yuanwb  2015-5  #disk_used_rate #depend  on real storage place the parameter  ' Location '  need to  Alter. location=/dev/sda1disk_used_rate1=$ (df -h | grep  $Location  | awk  ' {print $5} ') free1=

Transferred from: http://blog.csdn.net/wklken/article/details/6562098Sort,uniq,join,cut,paste,splitCommand--sortSort classifies many different fields in different column orderCommand format:Sort–cmu–o Out-putfile [Other options] *POS1 *pos2

Installing Polyshwget http://guichaz.free.fr/polysh/files/polysh-0.4.tar.gztar -zxvf polysh-0.4.tar.gzcd polysh-0.4sudo python setup.py installUsing Polysh Usage:/usr/bin/polysh [OPTIONS] HOSTS ... Control commands is prefixed by ":".

Business backgroundThe schedule.sh script is responsible for scheduling the execution of the user's trajectory engineering script, and intercepts some of the code as

Original address: http://www.cnblogs.com/chengmo/archive/2010/10/02/1841355.htmlString-related operations are often involved in the shell batch process. There are a lot of command statements, such as: awk,sed can do string various operations. In

View types of commands: type[[Email protected] ~]# type CDCD is a shell builtin[[email protected] ~]# type Lsls are aliased to ' ls--color=auto ' [[Email Protected] ~]# type-a Lsls is aliased to ' ls--color=auto ' ls is/bin/ls[[email protected]

Transferred from: Http://blog.163.com/[email protected]/blog/static/132229655201131055455754/Numeric operations:Only integer arithmetic is provided in bash, and the shell is implemented by the two commands of Let and expr .Use the format: let "x=

How to determine the number of input parameters in a shell script submission: Junjie font: [Increase decrease] type: Reprint This article mainly introduces the method of judging the number of input parameters in shell script, using the built-in

1#!/bin/Bash2Temp= 'getopt-O HM:--LongAai:,mai:-N'getopts.sh'--"[email protected]"`3Eval Set--"$TEMP"4 while true5 Do6 Case " $" inch7-h|--AAI)8 Echo$29 Shift 2;;Ten-m|--mai) One Echo$2 A Shift 2;; ---) - Shift the Break ;; -*)

Wrote a script to view the APK signature with the shell. The code is very small and simple.Supports recursive directory queries#!/bin/bash# how to use the./getcertificate.sh xx.apkget_signature () {path= ' jar tf ' $ ' | grep RSA ' #查找apk中RSA文件 jar

Advanced variable contains three parts1. Variable expansion2. Command replacement3. Arithmetic ExpansionIn the bash shell, the $ operator triggers the above three extensions in the following basic form:Basic types of extensions examples${variable

######### #20150419 ############################# #题目: Variable a= ' a/b/c ' how to intercept get c @@@@@@@@@@@@@@@@ From the operation and maintenance class 21 long wing finishing @@@@@@@@@@@@@@@@@@@[[email protected] shell]$ uname -r 2.6.32-504.

#/bin/bash#debug=0add=0del=0rm=0while [$#-gt 0]docase $ in-v|-verbose] debug=1shift;; -H|--HELP) #帮助文档echo "' basename $ '--add list--del list-h|--help--rm list" Exit 0;; --add) #添加用户ADD =1adduser=$2shift 2;; --del) #删除用户DEL =1deluser=$2shift 2;;

First, what is a variableShell programming language is a non-type interpreted language, unlike the C++/java language programming requires the declaration of variables, the shell assigns a variable, in effect, it defines the variable, in all Linux

The shell program mounts the iso image file and configures the local yum source, write a script, mainly do 1. Mount the local iso image file 2. boot the local iso image and mount it automatically 3. Use the iso image to configure the local yum

The shell script is used to add a user to delete a user's deleted files, #/Bin/bash # DEBUG = 0ADD = 0DEL = 0RM = 0 while [$ #-gt 0] docase $1 in-v |-verbose) DEBUG = 1 shift ;; -h | -- help) # help document echo "'basename $ 0' -- add LIST -- del