Shell

In development, we often need to change the N-file encoding, ICONV can only make changes to a single file, how to do? Let's write a shell script to solve this problem. Example one: Using shell script to implement bulk transcoding operation. #!/

There are 3 main types of shell loops, for,while,untilThe Shell's branch judgment is mainly 2 kinds, if,case A, for loop Copy Code code as follows: #!/bin/bash For file in $ (ls/tmp/test/mytest |grep SH) The//for in format is

I. Single-select annotations Lines that begin with "#" are comments that are ignored by the interpreter. Copy Code code as follows: #-------------------------------------------- # This is a script that automatically plays IPA,

This article describes the Gearman::xs in CentOS under the compiler installation method, for everyone to learn about! At present Gearman can support a variety of languages, its official website description is as follows: Language

Each process will have a PID, and each PID will have a corresponding directory under the/proc directory, which is the implementation of Linux (current kernel 2.6) system.General backdoor procedures, in the PS and other processes to see the tool can

1. Take the length Copy Code code as follows: Str= "ABCD" Expr Length $str # 4 echo ${#str} # 4 Expr "$str": ". *" # 4 It seems that the second type is commonly used 2. Find the position of substring Copy Code code as

Renames the current directory's image file in a specific format, as follows: Copy Code code as follows: #!/bin/bash #Filename: rename_photo.sh Set-x Count=1 For IMG in *.jpg *.png Todo new=image-$count. ${img##*.} MV

Rman backup Script #!/bin/bash su-oracle Third backup save platform automatically cleans up expired backup files #! /bin/bash for file in ' Ls/orabak ' does if [[${file:0:2} = = ' db ']];then

If your directory level is very deep, this shell will be very convenient to switch directly to the destination directory, such as Current directory/usr/home, and directory Desdir in/usr/home/app/local/opp/william/desdir Direct penetration $ CD

We can pass parameters to the script when we execute the Shell script. The format for getting parameters within a script is: $n. (n represents a number, 0 is the name of the shell script executed, 1 is the first argument to execute the script, 2 is

Command historySummary: Bash holds a list of commands that have been executed in the past.The command process for the current shell is saved in memory.When you exit, save the hidden folder to the current User folder. Bash_histroy, ls-a can

The color of the text terminal can be generated by using the ANSI unconventional character sequence. Example: echo -e "\033[44;37;5m ME \033[0m COOL" The above command sets the function as follows:

See if the script syntax has errors:Bash-n modify_suffix.shTrack executionSh-x modify_suffix.sh AAA1234. ${var:-string},${var:+string },${var:=string},${var:? String56. $ (Var%pattern), $ (Var%%pattern), $ (Var#pattern), $ (var # #pattern)The

The shell automatically collects server hardware system information, inserts a database, and displays it through a Web page.First, the shell automatically collects server hardware system information and inserts the database. #centos under 7

1. Analog Linnux Login Shell#/bin/bashEcho-n "Login:"Read nameEcho-n "Password:"Read passwdif [$name = "CHT"-a $passwd = "abc"];thenecho "The host and password is right!"else echo "Input is error!"Fi2. Compare two number sizes#/bin/bashecho "Please

HBASE table Structure Management detailed explanation　　List List of tables1 hbase (main):001:0> list 1 table 2 cdr 3 noc 4 2 row (s) in 0.1800 seconds 5 Span

Tag:bash    programming style     #!/bin/bash#=======================================================================================##            file:    bash_code_style.txt#    #          USAGE:     bash_code_style.txt [-h] [copy bash_code_style]

Shell commands are generally divided into built-in (self-contained) and exotic (except those that come with the Yum installation later)How to produce a built-in command: $ man Bash 1 (why add a 1 here because of the manual format)The composition of

Create accounts in bulk: Prompts the user to enter the first user name (such as People1) and the last user name (such as People10)[Email protected] ~]# vim useradd2.sh#!/bin/bashRead-p "Please input first User:" FirstuserRead-p "Please input last

CentOS 61-Key System optimized Shell scriptThe contents of the script are as follows:#!/bin/bash#author Suzezhi#this script is only for CentOS 6#check the OSPlatform= ' Uname-i 'if [$platform! = "x86_64"];thenecho "This script was only for 64bit