This is an easy script that appends the system uptime into the /dwelling/pratham/logs/uptime.log file. A handy scoreboard! WantedBy:- This is similar to your Just after and Right before fields, but the main variance is that this is used to specify systemd-equivalent "runlevels". I found both of those the highlighting of https://www.hostscheap.com/codecanyon-script-install-service