Linux配置与管理教程书上原脚本.docx

01.sh#！/bin/bash#program #this program shows Hello everyone !welcome to the world of shell script in your screen#History:# 2013/03/25 cc first releaseecho Hello everyone!echo welcome to the world of the shell script!02.sh#！/bin/bash#program #this program shows Hello everyone !welcome to the world of shell script in your screen#History:# 2013/03/25 cc first releaseread -p please enter your name: nameecho Hello $name,echo welcome to the world of shell script!03.sh#!/bin/bash#program:#let user input a filename,the program will search the filename #1)exist? 2)file or directory? 3)file permissions#让用户输入文件名，并且判断用户是否真的有输入字符串echo -e the program will show you that the filenames type and permission which you input.read -p input a filename:filenametest -z $filename & echo you must input a filename! & exit 0#判断文件是否存在，如果不存在则结束脚本test ! -e $filename & echo the file whose named $filename is not exit & exit 0#判断是否是普通文件，如果不是则结束脚本test ! -f $filename & echo the filename is not a regular file & exit0#文件存在且为普通文件，则开始判断文件的属性perm=test -r $filename & perm=$perm&readabletest -w $filename & perm=$perm&writabletest -x $filename & perm=$perm&executable#输出判断信息echo the regular &filenames permission is:$perm.04.sh#!/bin/bash#program:#this program show users choice echo if you want to continue ,please input Yecho if you want to interruput,Please input Nread -p please input your choice: choice $choice = Y -o $choice = y & echo ok ,continue! & exit 0 $choice = N -o $choice = n & echo ok ,interrupt! & exit 0echo i dont know what your choice is & exit 005.sh#!/bin/bash#program#this program will tell you the default variables used in scriptecho the script name is $0echo the first parameter is $1echo the second parameter is $2echo the third parameter is $3echo total parameter number is $#echo the whole parameter is $06.sh#!/bin/bash#program#this program show users choice echo if you want to continue ,please input Yecho if you want to interruput,Please input Nread -p please input your choice: choiceif $choice = Y -o $choice = y ;then echo ok ,continue! exit 0fiif $choice = N -o $choice = n ; thenecho ok ,interrupt! exit 0fiecho i dont know what your choice is exit 007.sh#!/bin/bash#program#this program show users choice echo if you want to continue ,please input Yecho if you want to interruput,Please input Nread -p please input your choice: choiceif $choice = Y -o $choice = y ;then echo ok ,continue! exit 0elif $choice = N -o $choice = n ; thenecho ok ,interrupt! exit 0elseecho i dont know what your choice is exit 0fi08.sh#!/bin/bash#program#show your choice with English(use if.then)echo which one is your favoriteecho 1.appleecho 2.bananaecho 3.orangeread -p please enter your choice (1-3): choiceif $choice = 1 ; thenecho your choice is APPLE!elif $choice = 2 ; thenecho your choice is BANANA!elif $choice = 3 ; thenecho your choice is ORANGE!else echo you must input a int from 1 to 3!fi09.sh#!/bin/bash#program#the program will test the character type you enteredread -p press some key then press return : KEYcase $KEY ina-z|A-Zecho its a letter.;echo its a digit.;*)echo its function Keys,Spacebar or other keys.esac10.sh#!/bin/bash#program:#the program executes the program you specifiedcase $1 instart| end)echo stop something;*)echo Ignorant;esac11.sh#!/bin/bash#program# this program will detect what operating system you useSYSTEM=uname -scase $SYSTEM inLinux)echo my system is Linuxecho do Linux stuff here.;FreeBSD）echo my system is FreeBSD echo do FreeBSD stuff here.*)echo Unknown system : $SYSTEMecho i dont know what to do .;esac12.sh#!/bin/bash#filename ;平均值function increment()avg=$($1+$2)/2)echo 在函数输出的值为 : $avgincrement $1 $213.sh#!/bin/bash#program:# plus int from 1 to 100s=0i=1while $1 -Lt 101 dos=$($s+$i)i=$($i+1)echo $i is plused to sdoneecho the result of 1+2+3+.+100 is $s14.sh#!/bin/bash#program:# plus int from 1 to 100s=0i=1until $1 -gt 101 dos=$($s+$i)i=$($i+1)echo $i is plused to sdoneecho the result of 1+2+3+.+100 is $s!15.sh#!/bin/bash#program# this program will tell us the use of mathematical expressionsecho please input 2 numbers,i will cross theyread -p first number: n1read p- second number: n2total1=$($n1*$n2)declare -i total2=$n1*$n2echo the number $n1*n2=$total1 echo the number $n1*n2=$total216.sh#!/bin/bash#progr