Schedule Shutdown in Linux

Some time we need shutdown process be automatically and our computer Shutdown automatically on particular time, this can be possible with Job scheduling

In Linux For Job Scheduling 2 utility available one is "at" and second is "cron"

at- Execute a task at a specific time. and "at" is Useful only to schedule one job at a time or a single future event. in this we can not define recurring events or daily events.

for shutting down Linux automatically at 11:59 pm, use following example.

# at 11:59pm at> halt (Press CTRL+D)

Some more command for "at"

• atq - List the current "at" jobs pending.
• atrm - Used to remove pending "at" jobs.

Linux Cron job to Shutdown Linux server/Desktop system:

cron – cron is Linux command line task scheduler, Useful to schedule recurring events or daily events such as backup, check system security etc.

Step 1 - Login as root user and at shell prompt type crontab -e command so that you can add cronjob.

# crontab -e

Step 2 - above command open root users crontab file in vim editor and then Append following entry to it (shutdown at 23:59 hrs (24 hrs format).

59 23 * * * /sbin/shutdown -h now

(3) Save the changes and exit from vim editor to shell prompt.