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For example; using awk to check whether a text file has exactly following 3 lines: AA BB CC cat $infile | awk '     BEGIN { retcode = 0; rowcount = 3 }     NR==1 { if ( $0 != "AA") { retco

# STR="MAIL FROM(CCC) TO(DDD)" #echo $STR | sed -n 's/.*FROM(\([^)]\{1,\}\)).*TO(\(.*\))/\1-\2/g'p 提取括号里面的内如 STR="MAIL FROM(ABCD) BODY" echo $STR | sed 's/^.*FROM(\(.*\)).*$/\1/g'      # A

Sometimes we many have many tasks to be executed by several workors. we wish tasks can be executed by workors in equal division Basic solution: 1. put all tasks into a PIPO pipeline. 2. Bring up

#!/bin/kshvar="123451234512345"output=${#var}            # 15output=${var#1*4}      # 51234512345, start must be the first char of that stringoutput=${var##1*4}   # 5, start must be t

KSH Variable Category function variable It must be explicitly declared within a function using typeset command.It's valid only within the function it is declared. script/file variable It's

In BASH, a variable is changed in a loop, but is kept untouched when quit loop; i.e, the new value set in loop is lost. function showme { echo -n "Loop=$linecount" sh -c 'echo " PID=$PPID"' }

Define Array Variable set -A COLORS RED BLUE GREEN or COLORS[0]=RED COLORS[1]=BLUE COLORS[2]=GREEN Get Array Size ${#COLORS[@]} Notice: this is the occupi

Problem Statement: Print numeric value 0000-9999 # use for loop #!/bin/ksh for i in {0..9999} do s=$(printf "%04d" $i) echo "for $s times" done # use while loop #!/bin/ksh

Case Statement Simple Case case ${FileType} in SHELL) FileType=SHELL ;; C) FileType=CPP ;; JAVE) FileType=JAVA ;; (*) FileType=UNKNOW return 255 esac Pa

Pattern Element  *      Matches any string, including the nullstring. ?      Matches any single character. [...]  Matches any one of the enclosedcharacters. [!...] Any character not

String Comparison [[ str1 == pattern ]]       str1 = pattern, [[ str1 = pattern ]]         Same as == above, but is obsolete [[ str1 != pattern ]]       str1 != pattern [[ str1 [[ st

 #!/bin/kshX=XYZcase $X inX* | *Z)        # X in pattern or sample    echo "1111111"    ;;X*Z)             # arg in pattern    echo "2222222"    ;;*)                 #default    echo "3333333"   

What's Signal When a signal is received, a script can do one of three actions: Ignore it and do nothing.Catch the signal using trap and take appropriate action.Take the default action. All th

This is a sample on how to use getopts to parse command line options. Principle while getopts "ab:c" opt; do case $opt in a ) process option -a ;; b ) process option -b

1. Build & Install For example we are going to install Template Perl module under directory ~/tools/perlmodule Download Template-Toolkit-2.24.tar.gzUnzip Template-Toolkit-2.24perl Makefi

// Solaris 1. find ./ -name "*.jar" -exec jar -tvf {} /; For each file found from find command, it will invoke a new process space to run tar -tvf ....  2. find ./ -name "*.jar" | xa

 目地:把一个配置文件里面的配置项拷贝到另一个配置文件中。 前提要求:两个配置文件基本相同, 文件名相同, 主要用在软件升级的情况下, 新版本的配置文件和老版本的配置文件基本相同, 但是可能新增或者删除了部分配置项, 现在需要一个工具把老的配置值拷贝到新的配置文件里面去.  原来的/u/XXX/old/a.conf新的/u/XXX/new/a.conf

1. Put your alias into your ~/.$(SHELL)rc file, for ksh example#~/>:cat .kshrcalias ll=ls -lalias scp=scp -F ~/.ssh/ssh_config#~/>:cat .kshrc For c shell, it should be .cshrcFor bash

#!/bin/ksh X=10Y=2  Z=`expr $X + $Y`    # orecho $Z(( Z = $X / 4 + 2 ))   # orecho $ZZ=$((X+Y))echo $ZZ=$(awk /^PermSize=/ {print substr($0, 10, 30)} $ODBCINI)echo $ZZ=$(echo 100 | gre

# Notice: this is executed within /bin/ksh #############  format #############if [ $condition ]then    ...elif [ ]    ...else    ...fiif /usr/bin/id | /usr/bin/grep uid=0(

#!/bin/ksh#  $#: command line parameters number, exclude the command itself#  $0: the command itself#  $1: the first command parameter#  $2: the second command parameter#  $*: all command

 #!/bin/ksh######### FOR #################for i in HUP INT QUIT TERMdo  echo $idone#cat f.txt#aa ab#ba bb bc##!/bin/kshfor word in `cat f.txt`do    echo $worddo