[HELP] linux command restart machine scheduled

[Soyeon]

i had tried google many website but most of the command i tried it wouldn't work on my Linux computer.

anyone know how to make my Linux machine do a soft-reboot every 8 hours?
or every 7am and 7pm.

i am really new to Linux just started to learn, please advise.

 

[ykgoh]

You'll need cron.

1. Edit your /etc/crontab file.
2. Add in this line: 0 */8 * * * /sbin/reboot

To execute /sbin/reboot to restart the Linux machine, the user account must be root.

I'm not Linux/Unix expert.

 

[Soyeon]

thank you for you help.

 

[ykgoh]

If you want a reboot at 7:00am and 7:00pm (12 hours in-between), then the line looks like:

0 7,19 * * * /sbin/reboot

You'll need to verify if this is correct and works as intended. Else you can page for resident expert davidktw.

 

[ykgoh]

You'll need cron.

1. Edit your /etc/crontab file.
2. Add in this line: 0 */8 * * * /sbin/reboot

To execute /sbin/reboot to restart the Linux machine, the user account must be root.

I'm not Linux/Unix expert.

Just to add, to edit your root crontab file to run under root account, run:

sudo crontab -e

Otherwise, it'll edit your normal user crontab and won't be able to run /sbin/reboot successfully.

 

[sanjaynblr]

man shutdown
info shutdown
is the place to go.

 

[Rock-kun]

if you are using Ubuntu (or Ubuntu-derived distributions), use sudo crontab -e to access the root cron.

For other distributions, you have to add the current user to the sudoers group, or you will get an error about sudo previleges. Alternatively, you can just use su like so:

su -
<enter root password>
crontab -e