Need to setup a cronjob to restart server every ten hours

[euser]

Hello,

How would I go about setting up a crontab to restart my server every ten hours?

Thanks.

[sonicgroup]

1) Why do you need to do that?

2) When you say server, what exactly are you referring to (Apache, MySQL, FTP, etc., the box itself)?

[CMI]

Its probably not a good idea, but eh. I don't have anything to do it every 10 hours, but here is a script I wrote recently to give individual users the same nice directory based cron access root can get. It "remembers" when it last issued commands.

2 notes: I didn't know what to call it, so every 12 hours is "meridianly". Also, output text from commands gets fudged. No line breaks.

#!/bin/bash

CRON_DIR="cron"
DONE_DIR=".done"

THISHOUR=$(date +%F-%k)
THISMERIDIAN=$(date +%F-%p)
THISDAY=$(date +%F)
THISWEEK=$(date +%y-%U)
THISMONTH=$(date +%y-%m)

for schedule in hourly meridianly daily weekly monthly; do
command_dir=~/$CRON_DIR/$schedule

datestring=""
if [ $schedule == hourly ]; then
datestring=$THISHOUR
elif [ $schedule == meridianly ]; then
datestring=$THISMERIDIAN
elif [ $schedule == daily ]; then
datestring=$THISDAY
elif [ $schedule == weekly ]; then
datestring=$THISWEEK
elif [ $schedule == monthly ]; then
datestring=$THISMONTH
fi

if [ -e $command_dir ]; then
for command in $(ls $command_dir); do
if [ ! -e $command_dir/$DONE_DIR/$command-$datestring ]; then
output=`$command_dir/$command 2>&1`

if [ ! -e $command_dir/$DONE_DIR ]; then
mkdir $command_dir/$DONE_DIR
fi

if [ $? -eq 0 ]; then
rm -f $command_dir/$DONE_DIR/$command-*
touch $command_dir/$DONE_DIR/$command-$datestring
fi

if [ -n "$output" ]; then
echo " ========== "
echo $schedule: $command
echo $output
echo ""
fi
fi
done
fi
done

[timryberg]

Hello,

How would I go about setting up a crontab to restart my server every ten hours?

Thanks.

The first step is to write a bash script, I know that much ;-)

As for creating a cron I'm not sure how to do that but I'm sure google could tell you :-)

[euser]

Hello just the box. It locks up once an a while. Developer suggests to setup a restart to clear out the excess memory for the server.

[IWorx-Chris]

I'd be leary if the solution was a periodic reboot euser, especially on a linux box. sonicgroup had it right in trying to nail down what exactly was causing the issue. a reboot cronjob is easy but if we can help you with the real problem that may be more helpful :).

Chris

[sonicgroup]

In my opinion, and I'm not trying to be hostile, or bash your developer, but you, as the server owner/script user, might want to have your dev take a look at whatever is causing the box to lock up. If it is indeed a script, there's something wrong - because it takes quite a bit to lock up a *nix box. ;)

The other problem you may run into - if the box itself locks up, a cron job won't be able to run and reboot the server. More than likely a hard reboot would be necessary.

[mpower]

I dont see why you ever need to reboot your nix box anyhow? I've known of a nix box(s) (server environment) that has running for more than 365days an more without rebooting.

I would seek professional help for someone to take a look at your box because of the questioned incident. Having to restart your box every 10hours is not a production machine i guess?