what in shell

Article Source: http://zhousir1991.diandian.com/page/4 [Root @ My ~] # Find.-Name *. rpm/Nessus-4.0.1-es5.i386.rpm [Root @ My ~] # Find.-Name * .tar.gzFind: paths must precede expression: recordmydesktop-0.3.8.1.tar.gzUsage: find [-H] [-L]

1. Single line comment: # echo "Hello World"2. Multi-line comment:: Tar cvzf $ databak_dir $3 $ date '. SQL' using databak_dir%3%date'.tar.gz '> 2> & 1SCP export databak_dir%3%date'.tar.gz '[email protected] "":/DIR # transfers backup files to

Execute MySQL statements in Shell scripts For automated O & M, such as backup and recovery, DBA often needs to encapsulate SQL statements into shell scripts. This article describes several methods for calling SQL statements in a MySQL database in a

Difference between reverse quotation marks (') and $ () in Shell Echo`Echo\ $ Hostname'//Reverse quotation marksecho $(echo \$HOSTNAME) //$() Someone asked today: Echo 'echo \\\\\\ W' echo $ (echo \\\\\\\ w) Why is

For automated O & M, such as backup and recovery, DBA often needs to encapsulate SQL statements into shell scripts. This article describes the shell script in the MySQL database in Linux. For automated O & M, such as backup and recovery, DBA often

Article title: automatically set different local codes under Shell and X. Linux is a technology channel of the IT lab in China. It includes desktop applications, Linux system management, kernel research, embedded systems, open source, and other

The Russian Square in shell. #! Binbash # TetrisGame # 10.21.2003xhchenxhchen@winbond.com.tw # color definition cRed1cGreen2cYellow3cBlue4cFuchsia5cCyan6cWhite7colorTable ($ cRed $ cGreen $ cYellow $ c #! /Bin/bash # Tetris Game #10.21.2003 xhchen

[[Email protected] shell] # Cat shift. Sh #! /Bin/bash Until [$ #-EQ 0]; do Echo "the first is: $1 total is $ #" Shift Done [[Email protected] shell] #./shift. Sh 1 2 3 4 5 6 The first is: 1 total is 6 The first is: 2 total is 5 The first

I am used to the C/C ++ programming environment, and then switched to shell programming, there is always a strange feeling. The general if-then-else Function Format in shell is as follows: If condition 1 Then command 1 Elif condition 2

The subscript of the array in shell starts from 0 by default. 1. Put the string in an array to obtain its length. #! /Bin/bashStr = "a B -- n d"Array = ($ str)Length =$ {# array [@]}Echo $ length For (I = 0; I DoEcho $ {array [$ I]}Done Execution

Some related regular expressions and some temporary files are often used in shell scripts written in Python.) There are also some related files such as the/etc/passwd file, the following is an introduction to the relevant files we will use in the

The case syntax in shell is as follows:Case word in pattern1) Statement (s) to be execute if pattern1 matchs; pattern2) Statement (s) to be execute if pattern2 matchs; pattern3) Statement (s) to be execute if pattern3 matchs; *) Default action ;;

In shell scripts, the $ default variable contains some internal variables, which are a special type of variables provided by Linux. These variables are used to make judgments in programs. In a shell program, the values of such variables cannot be

Modify the color in shell in LinuxEcho-e "\ 033 [32; 49; 1 m [DONE] \ 033 [39; 49; 0 m" output result: [DONE] ########################## the color of a text terminal can use "ANSI unconventional characters sequence. Example: echo-e "\ 033 [44; 37; 5

In shell scripts $, $ #, $? $0 the execution name of this program $ n the nth parameter value of this program, n = 1 .. 9 $ * all parameters of this program, this option parameter can exceed 9. $ # Number of parameters of the program $ PID of the

Use colons in shell with equal signs, plus signs, and minus signsIn question 13, there were cases of colons and equal signs mentioned, with colons, as long as they are null (undefined, null) can be overwritten;If no colon exists, it can be

Usage of $ {} in shell 1. truncation function $ {file # */}: remove the first/and its left string: dir1/dir2/dir3/my.file.txt $ {file ##*/}: remove the last/and its left string: my.file.txt $ {file #*.}: remove the first one. and the string on the

First, the shell.Equilateral triangle[[email protected] my_script]# sh ff.shnum:6     *     ***   *****  ******* ********************[[email protected]  my_script]# cat ff.sh#!/bin/bash############################################################## ##

Reprint please indicate: http://www.cnblogs.com/winifred-tang94/If conditional statement syntax:If [conditional expression]ThenCodeElseCodeFiNote : In the IF condition statement above, there should be a space between if and [, and the conditional

the difference between the ' and $ ' ():In Bash, $ () and "(anti-quote) are used for command substitution.Command substitution is similar to variable substitution, which is used to reorganize the command line, complete the command line in quotation