写一个脚本:
(1)能接受四个参数:start、stop、restart、status
输入start输出starting,脚本名为finished
(2)其它任意参数均报错退出
#!bin/bash
#author:jian
#date:2017-11-12
#discription:
read -p “please input a string(start|stop|restart|status):” str
case “$str” in
start)
echo “starting”
;;
stop)
echo “stoping”
;;
restart)
echo “stoping”
echo “starting”
;;
status)
echo “status”
;;
*)
echo “error”
exit 1
esac
[root@centos6 script]# sh finished.sh
please input a string(start|stop|restart|status):stop
stoping
[root@centos6 script]#
please input a string(start|stop|restart|status):stop
stoping
[root@centos6 script]#
写一个脚本判,判断给定的用户是否登录了当前系统。
(1)如果登录了,则显示用户已经登录,脚本终止
(2)每3秒,查看用户是否登录。
while true ;do
if who|grep “^$1\>” &> /dev/null ;then
echo “$1 is login”;
break;
fi
sleep 3;
echo “$1 is nologin”
done;
[root@centos6 script]# sh login.sh hi
hi is nologin
hi is nologin
hi is nologin
hi is login
hi is nologin
hi is nologin
hi is nologin
hi is login
写一个脚本显示用户要查看的信息
cpu) display cpu information
mem) display memory information
disk) display disks information
quit) quit
非此四类选项,则提升错误,并要求用户重新选择,直到给出正确的选择为止;
cat << EOF
cpu) display cpu information
mem) display memory information
disk) display disks information
quit) quit
EOF
read str
until [ “$str” = “cpu” -o “$str” = “mem” -o “$str” = “disk” -o “$str” = “quit” ];do
read -p “please input (cpu|mem|disk|quit): ” str
done;
case $str in
cpu)
lscpu
;;
mem)
free -m
;;
disk)
fdisk -l /dev/sd[a-z]
;;
quit)
echo “exit”
exit 0
;;
esac
[root@centos6 script]# sh until.sh
cpu) display cpu information
mem) display memory information
disk) display disks information
quit) quit
mem
total used free shared buffers cached
Mem: 980 449 531 1 82 134
-/+ buffers/cache: 232 748
Swap: 2047 0 2047
cpu) display cpu information
mem) display memory information
disk) display disks information
quit) quit
mem
total used free shared buffers cached
Mem: 980 449 531 1 82 134
-/+ buffers/cache: 232 748
Swap: 2047 0 2047
写一个脚本
(1)用函数实现返回一个用户的uid和shell;用户名通过参数传递而来;
(2)提示用户输入一个用户名或输入“quit”退出;
当输入的用户名,则用调用函数显示用户信息;
当输入quit,则退出脚本;进一步的:显示键入用户的相关信息后,再次提醒输出用户名或quit;
read -p “please input username or input \”quit\” to exit: ” username
uname() {
name=$1
if id -u $name &> /dev/null ;then
userId=`grep “^$name” /etc/passwd|cut -d: -f3`
userShell=`grep “^$name” /etc/passwd|cut -d: -f7`
echo “$name”
echo “userId:$userId”
echo “userShell:$userShell”
bash “$0”
else
echo “$name is no exist”;
exit 1;
fi
}
if [ “$username” != “quit” ];then
uname $username
else
exit 0;
fi
[root@centos6 script]# sh name.sh
please input username or input “quit” to exit: root
root
userId:0
userShell:/bin/bash
please input username or input “quit” to exit:
please input username or input “quit” to exit: root
root
userId:0
userShell:/bin/bash
please input username or input “quit” to exit:
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评论列表(1条)
脚本写的还行,继续加油。