写在前面：案例、常用、归类、解释说明。（By Jim）

创建菜单

#!/bin/bash

# testing the script

clear

echo

echo -e "\t\t\tSys Admin Menu\n"

echo -e "\t1.Display disk space"

echo -e "\t2.Display logged on users"

echo -e "\t3.Display memory usage"

echo -e "\t0.Exit menu\n\n"

echo -en "\t\tEnter option:"

（这段代码很有意思，会显示目录的效果）

创建菜单函数

function diskspace {

  clear

  df -k

}

function whoseon {

  clear

  who

}

function memusage {

  clear

  cat /proc/meminfo

}

添加菜单逻辑

case $option in

0)

  break ;;

1)

  diskspace ;;

2)

  whoseon ;;

3)

  menusage ;;

*)

  clear

  echo "Sorry,wrong selection" ;;

esac

完整的菜单如下：

#!/bin/bash

# testing the script

function diskspace {

  clear

  df -k

}

function whoseon {

  clear

  who

}

function memusage {

  clear

  cat /proc/meminfo

}

function menu {

  clear

  echo

  echo -e "\t\t\tSys Admin Menu\n"

  echo -e "\t1.Display disk space"

  echo -e "\t2.Display logged on users"

  echo -e "\t3.Display memory usage"

  echo -e "\t0.Exit menu\n\n"

  echo -en "\t\tEnter option:"

  read -n 1 option

}

while [ 1 ]

do

menu

case $option in

0)

  break ;;

1)

  diskspace ;;

2)

  whoseon ;;

3)

  menusage ;;

*)

  clear

  echo "Sorry,wrong selection" ;;

esac

echo -en "\n\n\t\tHit any key to continue"

read -n 1 line

done

clear