Shell Programming Notes

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awk ' {if (!system ("test-d")) print $} '

Batch Quick Create user

 for  in user{0.. Ten  Do     useradd $i    echo123456passwd --stdin $i Done

Use the IF statement to determine

#!/bin/bash# file Judgmentif[-E $1]; Then    Echo "File exists"fiif[-R $1]; Then  Echo "readable"fiif[ -W$1]; Then  Echo "writable"fiif[-X $1]; Then  Echo "executeable"fiif[-S $1]; Then  Echo "Have contents"fiif[-D $1]; Then  Echo "Directory"fiif[-F $1]; Then  Echo "file"fiif[-C $1]; Then  Echo "charactor Device"fiif[-B $1]; Then    Echo "Block Device"fi#字符串判断if[ $1="Admin"]; Then    Echo "You are admin"fiif[ $1!="Demon"]; Then    Echo "You is not demon"fiif[-Z $1]; Then    Echo "Zero String"fiif[-N $1]; Then    Echo "Not empty"fi#数字判断ifTest $1-eq4; Then    Echo "$1=4"fiifTest $1-ne4; Then    Echo "$1!=4"fiifTest $1-gt4; Then    Echo "$1>4"fiifTest $1-ge4; Then    Echo "$1>=4"fiifTest $1-lt4; Then    Echo "$1<4"fiifTest $1-le4; Then    Echo "$1<=4"fi#C语言语法if(( $1!='Demon')); Then    Echo "[C]not Demon"elif(( $1>5)); Then    Echo "[c]$1 > 5"fi

Color

Danger="\033[31m"Success="\033[32m"Primary="\033[34m"Warning="\033[33m]"Violet="\033[35m"Info="\033[36m"default="\033[37m"CLS="\033[0m"

Catalog file Statistics

#!/bin/Bashline= ' Tree-i-f |WC-l ' files= ' Tree-i-f |Head-N $ ($line-1)) ' FileCount=0Dircount=0 for file inch$files; Do    if[-D $file]; ThenDircount=`Expr$dirCount +1` ; Echo$file    ElseFileCount=`Expr$fileCount +1`    fi DoneEcho "Dir:"$dirCountEcho "Files:"$fileCount

Shell Programming Notes