Schedule a Linux reboot

 

Schedule a Linux reboot using shutdown -r <time>  

for one-time events, or crontab -e for recurring reboots. 

Common methods include sudo shutdown -r +60 (in 60 mins),  

sudo shutdown -r 02:00 (at 2 AM), 

 Use "shutdown -c" to cancel reboot 

or adding 0 3 * * * /sbin/shutdown -r now to crontab for daily 3 AM reboots

Running command at start up with crontab

    Running crontab -e will allow you to edit your cron.

    Adding a line like this to it:

    @reboot /path/to/script

    will execute that script once your computer boots up.

All about crontab

https://crontab.guru/examples.html

cron

Cron log
tail -f /var/log/cron

ENTRADAS ESPECIAIS DO CRON
Para ver os horario de execução da variaves especiais:
awk '/^[0-9]/ {print $1,$2,$3,$4,$5,$(NF-1)}' /etc/crontab

Executa script.sh ao ligar servidor
@restart /usr/local/bin/script.sh

Executa script.sh de hora em hora. Equivalente X * * * *
@hourly /usr/local/bin/script.sh

Executa script.sh uma vez ao dia. Equivalente X X * * *
@daily /usr/local/bin/script.sh

Executa script.sh uma vez por semana. Equivalente X X * * 0
@weekly /usr/local/bin/script.sh

Executa script.sh uma vez por mês. Equivalente X X 1 * *
@monthly /usr/local/bin/script.sh