简单shell 编程

简单shell编程  by  dreamboy

 #!/bin/bash
 while true
 do
     echo
     clear
     echo
     echo "        系统维护菜单        "
     echo "============================ "
     echo "      1)显示系统日期         "
     echo "      2)修改系统日期         "
     echo "      3)显示已登录用户       "
     echo "      4)重启电脑             "
     echo "      5)关机                 "
     echo "      6)退出                 "
     echo "============================ "
     echo "                            "
     echo -n "请选择："
     read sel
     case ${sel} in
         ) date +"%Y-%m-%d %H:%M";;
         ) echo -n "请输入新的日期(MMDDhhmm[[CC]YY])："
            read da
            date ${da};;
         ) who -u | awk '{print $1}';;
         ) shutdown -r now;;
         ) shutdown -h now;;
         ) break;;
     esac
     read
 done