linux 简易维护脚本 使用functions函数实现_function systemctl

#!/bin/bash
. /etc/init.d/functions
disable_selinux(){
        sed -i.bak 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
        action "SElinux已禁用,重新启动后才可生效"
}
disable_firewall(){
        systemctl disable --now firewalld &> /dev/null
        action "防火墙已禁用"
}
set_ps1(){
        echo "PS1='\[\e[1;35m\][\u@\h \W]\\$\[\e[0m\]'" > /etc/profile.d/reset.sh
    action "提示符已修改成功，请重新登录生效"
}
set_eth(){
    sed -i.bak '/GRUB_CMDLINE_LINUX=/s#"$# net.ifnames=0"#' /etc/default/grub
    grub2-mkconfig -o /boot/grub2/grub.cfg &> /dev/null
    action "网络名称已修改成功，请重新启动才能生效"
}
PS3="请选择相应的编号(1-6):"
MENU="
禁用SELinux
关闭防火墙
修改提示符
修改网卡名称
以上全实现
退出
"
select menu in $MENU;do
case $REPLY in
1)
        disable_selinux
    ;;
2)
        disable_firewall
    ;;
3)
    set_ps1
        ;;
4)
    set_eth
        ;;

5)
    disable_selinux
        disable_firewall
        set_ps1
        set_eth
    ;;
6)
    break
    ;;
*)
    echo "请输入正确的数字"
esac
done
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