What are some examples of using logrotate?

What are some examples of using logrotate?

Logrotate is a tool for managing log files. Here are a few examples of its usage:

1. Daily Rotation: Rotate logs daily and keep 7 days of logs.
2. Size-based Rotation: Rotate logs when they reach a certain size, e.g., 100MB.
3. Custom Scripts: Run a script after rotation to compress or archive logs.

How do I set up daily rotation for my web server logs?

To set up daily rotation for your web server logs, you can create a configuration file in /etc/logrotate.d/. For example:

/var/log/apache2/*.log {
    daily
    missingok
    rotate 7
    compress
    delaycompress
    notifempty
    create 0640 www-data adm
}

This will rotate the logs daily, keep 7 days of logs, and compress old logs.

Can I rotate logs based on their size?

Yes, you can rotate logs based on size. In your logrotate configuration, you can use the size option. For example:

/var/log/myapp/*.log {
    size 100M
    rotate 5
}

This will rotate the logs when they reach 100MB, keeping 5 rotations.

What happens to the logs after they are rotated?

After logs are rotated, they are typically compressed to save space, and older logs are either deleted or archived based on your configuration. You can also run custom scripts to handle logs post-rotation.