case loop syntax structure
case 变量 in
模式1)
命令序列1
;;
模式2)
命令序列2
;;
模式3)
命令序列3
;;
*)
无匹配后命令序列
esac
Applications
delete users
#!/bin/bash
read -p "请输入用户名：" user
id $user &>/dev/null
if [ $? -ne 0 ];then
echo "没有这个用户：$user"
exit 1
fi
read -p "你确定吗？[y/n]：" action
case "$action" in
y|Y|yes|YES)
userdel -r $user
echo "$user 已删除！"
;;
*)
echo "输入错误"
esac
System Toolbox
#!/bin/bash
#系统工具箱
#by 张恒 2020-12-31
menu () {
cat <<-EOF
##################################
# h.帮助 #
# x.系统信息 #
# f.磁盘分区信息 #
# d.系统文件挂载和使用情况 #
# m.内存使用 #
# u.系统负载 #
# q.退出 #
##################################
EOF
}
menu
xinxi() {
name=`hostname`
linux=`uname -r`
cpu=`cat /proc/cpuinfo |grep "model name" |awk -F ": " '{print $2}'`
mem=`cat /proc/meminfo |grep "MemTotal" |awk -F ": *" '{print $2}'`
disk=`fdisk -l |grep "sda：" |awk '{print $2}' |awk -F "：" '{print $2"GB"}'`
ip=`ifconfig ens33 |grep "netmask" |awk '{print $2}'`
echo "主机名：$name"
echo "内核版本：$linux"
echo "CPU型号：$cpu"
echo "内存大小：$mem"
echo "主硬盘大小：$disk"
echo "IP：$ip"
}
while :
do
read -p "请输入想使用的功能[h查看菜单]：" action
case $action in
h)
clear
menu
;;
x)
xinxi
;;
f)
fdisk -l
;;
d)
df -hT
;;
m)
free -h
;;
u)
iostat
;;
q)
break
;;
"")
;;
*)
echo "错误!"
esac
done
system service
You can use scripts to control system services with one click
#!/bin/bash
#系统菜单
. /etc/init.d/functions
cat <<-EOF
#########################
# 程序菜单 #
# 1.firewalld #
# 2.apche #
# 3.dhcp #
# 4.ftp #
# 5.dns #
# 6.docekr #
# 7.nginx #
#########################
EOF
read -p "请输入你想执行的程序：" zhu
case $zhu in
1)
name=firewalld
;;
2)
name=httpd
;;
3)
name=dhcpd
;;
4)
name=vsftpd
;;
5)
name=named
;;
6)
name=docker
;;
7)
name=nginx
;;
*)
echo "滚开！"
;;
esac
menu() {
cat <<-EOF
#########################
# 操作菜单 #
# 1.启动 #
# 2.重启 #
# 3.重载 #
# 4.查看状态 #
# 5.停止 #
# 6.永久关闭 #
# 7.开机自启动 #
# h.菜单 #
# q.退出 #
#########################
EOF
}
menu
while :
do
read -p "请输入你想执行的动作(h返回菜单)：" action
case $action in
1)
systemctl start $name
if [ $? -eq 0 ];then
action "the $name is start" /bin/true
echo "systemctl start $name"
else
action "the $name start is failed" /bin/false
echo "systemctl start $name failed"
fi
;;
2)
systemctl restart $name
;;
3)
systemctl reload $name
;;
4)
systemctl status $name
;;
5)
systemctl stop $name
;;
6)
systemctl disable $name
;;
7)
systemctl enable $name
;;
h)
menu
;;
q)
break
;;
*)
echo "滚开！"
esac
done