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use ‘rc.local’ file located in ‘/etc/’ to execute our scripts and commands at startup. $ sudo chmod +x /etc/rc.local
$ sudo vi /etc/rc.local
& at the bottom of file, add the entry
sh /root/script.sh &
For CentOS, we use file ‘/etc/rc.d/rc.local’ instead of ‘/etc/rc.local’. We also need to make this file executable before adding any script or command to the file.
Note:- When executing a script at startup, make sure that the script ends with ‘exit 0’.
//
create a cron job that will wait for 90 seconds after system startup & then will execute the command or script on the system.
@reboot ( sleep 90 ; sh /location/script.sh )