shell编程

#!/bin/bash#readnameecho "your first name:"read firstnameecho "your last name:"read lastname subnameecho "your full name is ${firstname} ${lastname}!"echo "yout subname is ${subname}"

#!/bin/bash#shell1.shecho $"脚本的名字 $0"echo $"第一个参赛 $1"echo $"第二个参数 $2"

 

#!/bin/bash#数组的演示fruit[0]=applefruit[1]=bananafruit[2]=peachfruit[3]="passion fruit"echo "单独显示:"echo $fruit[0]echo $fruit[1]echo $fruit[2]echo $fruit[3]echo "全部显示:"echo ${fruit[*]}echo ${fruit[@]}

 

#!/bin/bash# if判断if [ -d /usr/bin ]; thenecho "/usr/bin 是个目录文件！"elif [ -h /usr/bin]; thenecho "/usr/bin 是个符号链接文件"fi#case echo -n "please input [Yes, yes y, Y]："read ANScase "$ANS" in[Yy]es) ANS="Y" echo "${ANS}" ;;[Yy])ANS="N" echo "${ANS}" ;;esac#统计文件行数echo -n "please input file name:"read filenameif [ -f "$filename" ]; thenn=0while read linedon=`expr $n + 1`done < "$filename"echo $nfi#until用法x=1until [ $x -ge 10 ]doecho $xx=`expr $x + 1`done#for 循环处理文件mkdir ${HOME}/public1for file in $HOME/*docp $file ${HOME}/public1chmod a+r ${HOME}/public1/${file}done

 

x=0while [ $x -lt 10 ]doy=0while [ $y -le $x ]doecho -n "$y "y=`expr $y + 1`doneecho ""x=`expr $x + 1`done #无限循环 while : do list done#break 用来跳出循环while :do echo -n "please input the command which you want to exec: "read CMDcase $CMD in[qQ] | [qQ][Uu][iI][tT]) break ;;*) $CMD ;;esacdone#break 命令也可以接受一一个整数作为参数，大于等于1的整数，标记着退出循环的层数，在嵌套循环里很#有用for i in 1 2 3 4 5do mkdir -p /mnt/backup/docs/ch0${i}if [ $? -eq 0 ]; thenfor j in c h m pl shdo cp $HOME/docs/ch0${i}/*.${j} /mnt/backup/docs/ch0${i}if [ $? -ne 0 ]; then break 2; fidoneelseecho "Could not make backup directory."fidone#continue 命令for FILE in $FILESdoif [ ! -f "$FILE" ] ; thenecho "Error: $FILE is not a file."continuefidone