Linux Script

[applebananafruit]

Hi. I should have asked this a long time ago. I have a linux server which constantly crashes. Not a lot we can do about it. I need to find a script we can use on a cron job but I can't find any. There all not suitable. Some are close.

Are they hard to make? Could I get one here. It only needs to check if a process is running if not reset.

[monkeyking]

Hi,
I don't quite get what you want.
If you know some commandline tools this should be easy.

you can do something like


ps -aux | grep YOUR_PROG

[geirha]

Try stopping the process on purpose, then run
pidof /usr/local/bin/myprocess && echo running || echo not running
It should print «not running». If you start the process, it should print the pid of the process and «running».

If the above holds true, then you can make a script that looks like:

#!/bin/sh
if ! pidof /usr/local/bin/myprocess >/dev/null; then
/usr/local/bin/myprocess
fi

[applebananafruit]

Thank you very much. I'll try these and see how they go.

[applebananafruit]

Sorry to be a pain. But is there one I can punch into the cron job to do it for me. I'm a little confused. I've very new to this. I got the idea when I read about it you need a tiny script which you would tell the cron to run every couple of minutes. Then if down or process is not running then start.

[geirha]

Let's say you've created your script and saved it with the filename thescript, then make it executable, and move it out of your homedir. /usr/local/bin/ is a good place to put it


chmod -v +x thescript
sudo mv -v thescript /usr/local/bin/

Now add it to the crontab by running
sudo crontab -e The syntax of the file is explained in crontab(5) which you read by running
man 5 crontab The manual page contains examples as well.

Make sure your provide the full path to the script (/usr/local/bin/thescript), not just thescript.

[applebananafruit]

And the script I use. If it works.

#!/bin/sh
if ! pidof /usr/local/bin/myprocess >/dev/null; then
/usr/local/bin/myprocess
fi