at command

[Tarek]

Hallo, i have to program a reboot tomorrow morning at 6 a.m. I want to use at command, but i'm not sure on how using it. I saw the man but it isn't very clear...can u help me??
thanks

[Vincenzo Restuccia]

Run a job contained in future in the home directory at 12:20 a.m. on December 27, 2013:

at -f $HOME/future -t201312271220.00



Run a job contained in jobfile in the home directory at 5:00 a.m. next Tuesday:

at -f $HOME/jobfile 5am tuesday next week



Run the same job at 5:00 a.m. one week from next Tuesday (i.e., 2 Tuesdays in advance):

at -f $HOME/jobfile 5am tuesday + 2 weeks

[Tarek]

i have to program a reboot, i don't want to run a job file.
Is this syntax right??
at -t 03280600 shutdown -r -y now

[Tarek]

i have to program a reboot, i don't want to run a job file.
Is this syntax right??
at -t 03280600 shutdown -r -y now

[Tarek]

i have to program a reboot, i don't want to run a job file.
Is this syntax right??
at -t 03280600 shutdown -r -y now

[Pedro Sousa · Accepted solution]

1 - create the script with the command shutdown/reboot.
2 - Run the following command: "at -f <script> -t 03280600"

Don't forget to mencion all the path in the field <script>
This will reboot your system at 6 a.m.

good luck.

[Mark Vollmers]

You should be able to just enter "at -t 03280600 reboot". I don't think can put the date and time and then the now command as well; it's one or the other.

Mark

[Steven Sim Kok Leong]

Hi,

Please note that the "at" command launches the command from the current directory you execute the "at" command. If you are executing the shutdown command, please note that shutdown can only be run from the / directory.

To verify, access your "at" scheduled job in /var/spool/cron/atjobs and look out for the "cd " portion of the script.

Thus, you should either run the "at" command at /, or write a script that "cd /" before shutdown.

Hope this helps. Regards.

Steven Sim Kok Leong
Brainbench MVP for Unix Admin
http://www.brainbench.com

[Bill Hassell]

Be careful with the reboot command. It's great when you are in single user mode with no users and processes running. But it is very unkind to processes that buffer large amounts of data which needs to be flushed.

shutdown goes though all the start/stop scripts in a controlled order and signals all processes to terminate normally, giving them time to come to a normal end of job.

[Satish Y]

many ways,

Take root and execute
# at 6:00am tomorrow reboot

place shutdown/reboot command in a file. suppose today is March 27th u can also execute

# at -f 6:00am Mar 28
or
# at -f 0600 Mar 28
or
# at -f -t 03280600

u can execute whatever way in above u want...

Cheers...
Satish.

[Thierry Poels_1]

maybe to late for your problem, buy anyway:

why don't you put the shutdown command in the crontab. You'll need to remove it again from your crontab afterwards but anyway (to avoid rebooting next day, next year, ...)

As stated before you should use "shutdown -r" instead of "reboot".

good luck,
Thierry.