Linux 下设置开机自启方法

方法一：/etc/rc.local

直接在 /etc/rc.local 文件末追加要开机运行的脚本，这种方法不推荐使用。

[root@localhost ~]# cat /etc/rc.local 
#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
#
# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this file.
#
# In contrast to previous versions due to parallel execution during boot
# this script will NOT be run after all other services.
#
# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
# that this script will be executed during boot.

touch /var/lock/subsys/local
bash /root/script/restart.sh

方法二：Crontab

Crontab 可以使用 @reboot 来执行主机启动之后的命令。
打开 Crontab 编辑器

[root@localhost ~]# crontab -e

添加以下内容：

# 重启后自动执行指定脚本
@reboot /root/script/restart.sh
# 在启动5分钟后运行指定脚本
@reboot sleep 300 && /home/clean-static-cache.sh

方法三：Systemd

通过 Systemd 管理器，管理自启项。推荐使用该方法

[root@localhost ~]# vim /lib/systemd/system/restart.service

[Unit]
Description=restart script
After=default.target

[Service]
ExecStart=/root/script/restart.sh

[Install]
WantedBy=default.target

设置开机自启

[root@localhost ~]# systemctl daemon-reload
[root@localhost ~]# systemctl enable restart.service
Created symlink from /etc/systemd/system/default.target.wants/restart.service to /usr/lib/systemd/system/restart.service.