This program watches a file for changes and sends a notification (email, mailgun, discord, telegram and teams) when one of the provided strings matches.

It's basically a tail -f file | grep match that sends every hit per notification. This way you can watch a logfile for errors and get a notification to you if one occurs.

To install the systemd service you can use the install_service.sh helper script or simply copy the logwatcher.service to the right place.

See config.json.exampe for an example config and adopt it to your needs.

For mailing, you can use Mailjet which gives you 200 free mails per day currently.

logwatcher -config config.json

Use --help for all available command line options