linuxcase语句成绩,linux命令练习：case选择结构语句练习(示例代码)

练习一&＃xff1a;

1、接收参数&＃xff0c;提示输入的参数是什么类型&＃xff1a;

#!/bin/bash

#program:

#接收参数并输出参数类型

#history donggen 2016-10-27-17:20

PATH&＃61;/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bansh

export PATH

case $1 in

[[:digit:]])

echo "it is Digit"

;;

[[:lower:]])

echo "it is Lower"

;;

[[:upper:]])

echo "it is Upper"

;;

*)

echo "it is Unknown"

;;

esac

练习二:

2、写一个脚本&＃xff0c;可以接受选项及参数&＃xff0c;而后能获取每一个选项&＃xff0c;及选项的参数&＃xff1b;

并能根据选项及参数做出特定的操作。比如administrators.sh -add tom,jerry --del tom,blair

-v|--verbose -h|--help

#!/bin/bash

#program:

#练习接收参数&＃xff0c;并获取参数

#history  donggen 2016-10-27-22:40

PATH&＃61;/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bash

export PATH

DEBUG&＃61;0

ADD&＃61;0

DEL&＃61;0

for I in &＃96;seq 0 $#&＃96;; do

if [ $# -gt 0 ]; then

case $1 in

-v|--verbose)

DEBUG&＃61;1

shift ;;

-h|--help)

echo "Usage:&＃96;basename $0&＃96; --add USER_LIST --del USER_LIST -v|--verbose -h|--help"

exit 0

;;

--add)

ADD&＃61;1

ADDUSERS&＃61;$2

shift 2

;;

--del)

DEL&＃61;1

DELUSERS&＃61;$2

shift 2

;;

*)

echo "Usage:&＃96;basename $0&＃96; --add USER_LIST --del USER_LIST -v|--verbose -h|--help"

exit 7

;;

esac

fi

done

if [ $ADD -eq 1 ]; then

for USER in &＃96;echo $ADDUSERS |sed ‘[email protected],&＃64; &＃64;g‘&＃96;; do

if id $USER &>/dev/null; then

[ $DEBUG -eq 1 ] &&echo "$USER exists."

else

useradd $USER

[ $DEBUG -eq 1 ] &&echo "Add user $USER finished."

fi

done

fi

if [ $DEL -eq 1 ]; then

for USER in &＃96;echo $DELUSERS |sed ‘[email protected],&＃64; &＃64;g‘&＃96;; do

if id $USER &>/dev/null; then

userdel -r $USER

[ $DEBUG -eq 1 ] &&echo "Delete $USER finished."

else

[ $DEBUG -eq 1 ] &&echo "$USER not exist."

fi

done

fi