LinuxShell脚本编程实例

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1、#! /bin/sh echo Current command is $0echo The first parameter is $1 echo The second parameter is $2 echo The third parameter is $3 echo Total of parameters if $# echo Current PID is $#!/bin/bashtimes=0until $times = 3 ;doecho I love linux.sleep 2times=expr $times + 1done#!/bin/bash# menu shell scrip

2、t. samli 2004.4.19untilecho List Directory1echo Change Directory2echo Edit File3echo Remove File4echo Exit Menu5read choicetest $choice = 5docase $choice in1) ls;2) echo enter target directory: read dircd $dir；3) echo enter file name:read filevi $file；4) echo enter file name:read filerm $file5) echo

3、 Goodbye*) echo illegal option, please input again. esacdone#! /bin/sh var1=abcd efg echo $var1 var2=1234echo The value of var2 is $var2”echo $HOME echo $PATH echo $PWD#! /bin/shnum=0while $num -le 10 donum=expr $num + 1 if $num -eq 5 thencontinue fisquare=expr $num * $numecho $squaredone#!/bin/bash

4、# Gnu bash versions 2.x# The Party Program一Invitations to friends from the# guest file guestfile=./guests # /shell/guests if ! -e $guestfilethenprintf $guestfile#*/ non-existent exit 1fiexport PLACE=Sarotinis”(Time=$(date +%H) + 1 )set cheese crackers shrimp drinks hot dogs sandwiches for person in

5、$(cat $guestfile)doif $person = root thencontinueelse# Start of here documentmail -v -s Party $personHi $person! Please join me at $PLACE for a party!Meet me at $Time oclock.Ill bring the ice cream. Would you please bring $1 and anything else you would like to eat? Let me know if you cant make it.Ho

6、pe to see you soon.Your pal, ellie$(hostname)FINISshiftif ( $# = 0 )thenset cheese crackers shrimp drinks hot dogs sandwiches fifidoneprintf Bye.#!/bin/sh# Standard AT&T Bourne Shell# The Party Program一Invitations to friends from the# guest fileguestfile=./guests # /home/ellie/shell/guests if ! -f $

7、guestfile thenecho 熠 asename $guestfile?non-existent”exit 1fiPLACE=Sarotinisexport PLACETime=date +%HTime=expr $Time + 1set cheese crackers shrimp drinks hot dogs sandwiches for person in $(cat $guestfile) doif $person = root thencontinueelse# Start of here document mail -v -s Party $personHi $perso

8、n! Please join me at $PLACE for a party!Meet me at $Time oclock.Ill bring the ice cream. Would you please bring $1 and anything else you would like to eat? Let me know if you cantmake it.Hope to see you soon.Your pal,elliehostnameFINIS shift if $# -eq 0 thenset cheese crackers shrimp drinks hot dogs

9、 sandwiches fifidoneecho Bye.#!/bin/sh# Scriptname: args# Script to test command line arguments echo The name of this script is $0.echo The arguments are $*.echo The first argument is $1.echo The second argument is $2.echo The number of arguments is $#. oldargs=$*set Jake Nicky Scott# reset the posi

10、tional parametersecho All the positional parameters are $*.echo The number of postional parameters is $#.echo GoodVbye for now, $1 set $(date)# reset the positional parametersecho The date is $2 $3, $6.echo The value of $oldargs is $oldargs.set $oldargs echo $1 $2 $3# Name: bigfiles# Purpose: Use th

11、e find command to find any files in the root# partition that have not been modified within the past n (any# number within 30 days) days and are larger than 20 blocks# (512 byte blocks)$# -ne 2 if ( $# != 2 )# orthenecho Usage: $0 mdays size 1&2exit 1fiif ( $10 | $1 30 ) # or $1 -lt 0 -o $1 -gt 30 th

12、enecho mdays is out of rangeexit 2fiif ( $2# or $2 -le 20 thenecho size is out of rangeexit 3fifind / -xdev -mtime $1 -size +$2#!/bin/bash# Scriptname: checker# Script to demonstrate the use of special variable# modifiers and argumentsname=$1:?”requires an argument echo Hello $name #!/bin/bash# This

13、 is the first Bash shell program of the day.# Scriptname: greetings# Written by: Barbara Bashfulecho Hello $LOGNAME, its nice talking to you.echo Your present working directory is pwd.echo You are working on a machine called uname -n. echo Here is a list of your files.ls # list files in the present

14、working directory echo Bye for now $LOGNAME. The time is date +%T! #!/bin/bash# Scriptname: greetings2echo This script is called $0.echo $0 $1 and $2echo The number of positional parameters is $# #!/bin/bash# Scriptname: idcheck# purpose:check user id to see if user is root.# Only root has a uid of 0.# Format for id output:uid=9496(ellie) gid=40 groups=40# roots uid=0id=id | gawk -F=( ,print $2、# get user idecho your user id is: $idif ( id = 0 )# or $id -eq 0 thenecho you are superuser.elseecho you are not superuser.fi