I was currently controlling this through an uptime. The computer restarts if uptime is greater than 1h.
But I do not know how to control if the computer is one day on or more, because currently I only control the hours.
Is it possible to control days, hours and minutes with uptime? I need to restart the computer when the power on time is greater than 1h. If the time is 1 day and 0 hours gives failure.
Sorry for my explanation, it is a script that does a series of things and alfinal exists this function that is responsible for controlling this parameter.
thanks for reading me
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Answer
Not sure I quite understand your issue.
If you want your computer to ALWAYS reboot after a specific amount of time, which is very unusual, then use cron. Add this to /etc/crontab (alternatively, if there is a /etc/cron.d directory on your machine, you can also create a file /etc/cron.d/reboot with this content) :
@reboot root sleep 1800; /sbin/reboot
(adapt reboot‘s path to match your system; 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).
Then, I understand you have difficulties parsing the result of uptime and you should use /proc/uptime which gives your uptime in seconds:
#!/bin/sh not_before=1800 # Number of seconds - adapt to your needs uptime=$(cut -d . -f 1 /proc/uptime) [ "$uptime" -ge "$not_before" ] && exec reboot echo "Sorry, only $uptime s of uptime; you must wait $((not_before - uptime)) seconds" >&2 exit 1