/etc/rc.local 是一个开机启动脚本

		
[root@testing ~]# 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		
		
		

CentOS 8 Stream 如果你想使用 rc.local 需要做如下配置

		
cat >> /usr/lib/systemd/system/rc-local.service <<EOF

[Install]
WantedBy=multi-user.target
EOF		
		
		

		
[root@testing ~]# chmod +x /etc/rc.d/rc.local		

[root@testing ~]# systemctl enable rc-local
Created symlink /etc/systemd/system/multi-user.target.wants/rc-local.service → /usr/lib/systemd/system/rc-local.service.

[root@testing ~]# systemctl start rc-local	

[root@testing ~]# systemctl status rc-local
● rc-local.service - /etc/rc.d/rc.local Compatibility
   Loaded: loaded (/usr/lib/systemd/system/rc-local.service; enabled; vendor preset: disabled)
   Active: active (exited) since Mon 2021-08-16 12:57:16 CST; 2s ago
     Docs: man:systemd-rc-local-generator(8)
  Process: 532000 ExecStart=/etc/rc.d/rc.local start (code=exited, status=0/SUCCESS)

Aug 16 12:57:16 testing systemd[1]: Starting /etc/rc.d/rc.local Compatibility...
Aug 16 12:57:16 testing systemd[1]: Started /etc/rc.d/rc.local Compatibility.