Bashscripts.org

I've been googling and reading posts at this forum trying to learn some bash scripts. I'm a total noob at this and I'm at the point of giving up.

Therefor I seek your help.

Basically what I want to do is tail a log file, if the word "error" presents itself I want to issue a set of commands. And I want to run this script forever, meaning if the error presents itself, and the commands are executed I want it to start the tail for error again. (the log file will be deleted and recreated as part of the commands executed)

Please help

Here is the test to make it work


make sure you start your script with "#!/bin/bash" or whatever shell you use (most likely bash ) and make the script executable before you run it


happy scripting

Thank you for helping out.

It's not working quite as planned though, because I want it to watch the log file forever, not just check if the word error is in the file when I issue the script. I tried simply changing it to "tail -f", but that didn't work either. Maybe create a loop on the first line somehow ?

The following may do what you're after, although it's not fantastic as continuously running process.



This will scan the logfile looking for error every 15 seconds
It does scan the whole log file each time though so it may not be suitable if your logfile is large.

Thank you, that one seems to do what I want it to.

but what do you mean by "although it's not fantastic as continuously running process."

the log file is very small, typically about 100bytes, 1K at the most.