bash shell scripting tutorial

Follow the Runoob website tutorial to learn the notesLike other languages, the shell can also contain external scripts. This makes it easy to encapsulate some common code as a standalone file. Shell files contain syntax in two forms . FileName #也就是一个英文句号后面跟着想要包含的文件名, notice that there is a space separating the middle SOURCE filename While experi

Recent project requirements, need to write some shell script interaction, the pipeline is not enough time, expect can be very good to implement the interaction between the script, search for information, found that many articles on the Web are reproduced, I think this article is also good, so simple changes to take over and share with you ~1. Expect isSpawn: Add the shell commands you need to execute, such

Tags: shell mysql startup scriptEnterprise Shell face question 10: Develop MySQL startup scriptDescriptionThe MySQL startup command is:/bin/sh mysqld_safe--pid-file= $mysqld _pid_file_path 2>1 >/dev/null The Stop command is:Mysqld_pid= ' cat ' $mysqld _pid_file_path "'if (kill-0 $mysqld _pid 2>/dev/null)ThenKill $mysqld _pidSleep 2FiPlease complete the MySQL startup script writingRequirements: Implemented w

Tags: linux operations computer network Dahne Red Hat Linux system operationShell ScriptScript: Can execute the file, after running can implement some function (command stack, non-interactive)Standardize the general composition of shell scripts#! Environmental Statement (Sha-bang)# comment TextExecutable code#！ /bin/bash #环境声明 that the script written by Bash is a

shell scripting Introduction and common Tools Shell Script Shell script: is actually a batch script in Windows, multiple shell command collections that can be executed at once. Scripts on Linux can be implemented in a number of languages, and the

Purpose: Self-collation, self-review, self-reflection!Content: Dry Goods! Dry!! Dry!!!Attach: The shortcomings of the hope that you correct, can give like me rookie a little inspiration is the best. Just the inspiration ...Thank you: Thank the old boy (see your blog post and video, O (∩_∩) o haha ~), of course, there are online technology Daniel, reference book "UNIX Shell"Bash

????????echo?"$username?已经登录"????????echo?"fuck?,go?out?my?system"?|?write?$username????else????????echo?"$username?已经下线"????fi????sleep?3done}21, randomly generated within 10 of the number, to achieve the word guessing game, the hint is relatively large or small, equal to exit#!bin/bashlim=10let?key=$RANDOM%limread?-p??"please?input?a?number?less?than?$lim:?"?numuntil?false;do????if?[?$num?-le?$lim?>?/dev/null??]??[?$num?-ge?0??>?/dev/null?]?;then????????if?[?$num?-lt?$key?];then????????????rea

Bash Shell Basic features three (array)One, the array definitionAn array is a contiguous number of independent memory spaces, each of which corresponds to a variable. The bash shell supports only one-dimensional arrays, but there is no limit to the number of arguments.Array elements: Array name + index (numbering start

' #将匹配行输出到文件 Sed '/root/r abc.txt '/etc/passwd #把abc. txt file contents after reading into the root matching line Sed-n '/root/w a.txt ' Sed-n '/root/{=;p} '/etc/passwd #打印行号和匹配root的行 Sed-n '/root/{n;d} '/etc/passwd #将匹配root行的下一行删除 Sed-n '/root/{n;d} '/etc/passwd #将匹配root行和下一行都删除 Sed ' 22{h;d};23,33{h;d};44g ' pass Vii. sed Script Writing method1. Read the command from the file[Plain]View Plaincopy Sed-f sed.sh sed.sh File

Tags: operations shell scripting frequent access to the Internet part of the mutual summaryIn daily work, the bash shell has a very frequent time operation. For example, when the shell script sends statistics periodically, it will check whether the scheduled send time is cur

}69fib 650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M02/83/3A/wKioL1ds-AHzMGi6AACeHA28HgU614.jpg-wh_500x0-wm_3 -wmp_4-s_2750262765.jpg "title=" Fibonacci recursion. JPG "alt=" Wkiol1ds-ahzmgi6aaceha28hgu614.jpg-wh_50 "/>Vi. Fibonacci (Recursive)#!/bin/bashfunctionfib () 76{77localval=$178 localfiv_val1=079localfiv_val2=0 80localfiv_curr=081if[ $1-lt3];then82 echo183 Return84fi85letval--86 fiv_val1=$ (fib $val ) 87let val--88fiv_val2=$ (fib $val ) 89 letfiv_curr= $fiv _val1+ $fiv _val29

are currently using[Email protected] conf]# echo $BASH/bin/bash2 script +x to debug, troubleshoot errors[[email protected] sh]#/bin/bash-x variable.sh + hellovariable.sh: line 2:hello: Command not found + a=123+ echo ' Print variables equal I S 123 ' Print variables equal is 1233-E \ n line breakEcho-e "Start scripts. \ n .... "4-E \033[32m \033[0m Promise color [32m can be changed to 33/34/35/36 color]Ech