4、写一个脚本
(1) 能接受四个参数:start, stop, restart, status
start: 输出“starting 脚本名 finished.”
(2) 其它任意参数,均报错退出。
#!/bin/bash # [ $# -ne 1 ] && echo "You should give one parameter." && exit 1 case $1 in start) echo "Starting $0 finished." ;; stop) echo "Stopping $0 finished." ;; restart) echo "Restarting $0 finished." ;; status) echo "Status of $0 is normal." ;; *) echo "You gave wrong parameter.Now,exiting..." exit 2 ;; esac
5、写一个脚本,判断给定的用户是否登录了当前系统。
(1) 如果登录了,则显示用户登录,脚本终止。
(2) 每3秒钟,查看一次用户是否登录。
#!/bin/bash # [ $# -ne 1 ] && echo "You should give one parameter." && exit 1 while true;do if who | grep -o "^\($1\)";then echo "$1 is already logged on." exit 0 fi sleep 3 done
6、写一个脚本,显示用户选定要查看的信息。
cpu) display cpu info
mem) display memory info
disk) display disk info
quit) quit
非此四项选择,则提示错误,并要求用户重新选择,只到其给出正确的选择为止。
#!/bin/bash # cat << EOF cpu) Display CPU information. mem) Display memory information. disk) Display disk information. quit) Quit. ======================================= EOF read -p "Please enter your choice:" option while [ "$option" != "cpu" -a "$option" != "mem" -a "$option" != "disk" -a "$option" != "quit" ];do echo "You should enter cpu,mem,disk,or quit." read -p "Enter your choice again:" option done case $option in cpu) lscpu ;; mem) free -m ;; disk) fdisk -l /dev/sd[a-z] df -h ;; quit) echo "Exiting..." exit 0 ;; esac
7、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。
当输入的是用户名,则调用函数显示用户信息。
当用户输入quit,则退出脚本;进一步地:显示键入的用户相关信息后,再次提醒输出用户名或quit。
#!/bin/bash # cat <<EOF You give one username,then you'll get some information,e.g. user id and user shell. ============================================================================= EOF user_info() { while true;do read -p "Please enter a username:" username if id -u $username &>/dev/null;then echo "$username's id is $(id -u $username)" echo "$username's shell is `grep "^\($username\)\>" /etc/passwd | cut -d: -f7`." else if [ $username == "quit" ];then echo "Existing..." exit 0 else echo "Please enter a correct username." continue fi fi done } user_info
8、写一个脚本,完成如下功能(使用函数)
(1) 提示用户输入一个可执行命令的名字;获取此命令依赖的所有库文件。
(2) 复制命令文件至/mnt/sysroot目录下的对应的rootfs的路径上,例如,如果复制的文件原路径是/usr/bin/useradd,则复制到/mnt/sysroot/usr/bin/目录中。
(3) 复制此命令依赖的各库文件至/mnt/sysroot目录下的对应的rootfs的路径上;规则同上面命令相关的要求。
#!/bin/bash # cat <<EOF Enter your command ,then the program will copy the command file and lib files to /mnt/sysroot/lib64/ . ================================================================================================== EOF copycmd() { while true;do read -p "Enter yours command:" command if which $command &>/dev/null;then sour=$(whereis -b $command | grep -o "/.*") dest="/mnt/sysroot"$sour cp $sour $dest if [ $? -eq 0 ];then echo "A copy of $command is finished." else echo "A copy of $command is failed." continue fi sour1=$(ldd $sour | grep -o "/lib64/.*[[:space:]]") dest2="/mnt/sysroot/lib64" cp $sour1 $dest2 if [ $? -eq 0 ];then echo "A copy of $command's lib files is finished." else echo "A copy of $command's lib files is failed." continue fi else if [ $command == "quit" ];then echo "Existing..." exit 0 else echo "Please enter a correct command." continue fi fi done } copycmd
原创文章,作者:N24_lantian,如若转载,请注明出处:http://www.178linux.com/65735
评论列表(1条)
脚本写的很不错,对于脚本传参有了深刻的总结。