HowTo Run A Script At Boot
When customizing a NST system, it is often desirable to run a script at boot time to perform some specific actions.
In the past, you could simply edit the /etc/rc.d/rc.local configuration file to run system specific commands. After Fedora moved to using systemd to manage system services, the /etc/rc.d/rc.local file is no longer present. However, the /etc/rc.d/rc.local script is still honored by systemd via the rc-local.service target.
You can verify that the rc-local.service is enabled at boot time using the following command:
[root@taco-dev32 nstboot]# systemctl is-enabled rc-local.service && echo yes static yes [root@taco-dev32 nstboot]#
At the time of this writing, the rc-local.service target looked something like the following:
[Unit] Description=/etc/rc.d/rc.local Compatibility After=network.target [Service] Type=forking ExecStart=/etc/rc.d/rc.local start TimeoutSec=0 RemainAfterExit=yes SysVStartPriority=99
To run commands at boot time using the rc-local.service script you need to do the following:
- Create the file: /etc/rc.d/rc.local.
- Optionally check for the "start" argument (which is passed via the ExecStart parameter shown above).
- Put the commands you want to run inside the file.
- Make it executable.
Here is a example /etc/rc.d/rc.local file which starts up a VNC server for the pkb user account automatically at boot time:
#!/bin/bash /bin/su - pkb -c 'nstvncadmin --mode setup -d 6 --desktopmgr fluxbox';