Reboot is a Unix command to restart the operating system
Uptime is a Unix command which tells how long the system has been running.
Yesterday i needed to reboot production server on debian 6 with more than 3-y uptime and 3rd party configured billing system on it
Passenger or.. ? Exception RuntimeError in PhusionPassenger::ClassicRails::ApplicationSpawner
1800 is the number of seconds for 30 minutes change it to whatever delay you need on the other hand you may be writing a script that will reboot your server and you may want to keep it from working if it is run before 30 minutes of uptime which makes more sense
Restart the computer when the power on time exceeds 30 minutes