How it works...

So, what just happened? There's a lot of output, so let's cover the highlights. The script configures and builds the OSSEC binaries. Once the compilation has completed, the OSSEC users and groups are created on the system if they do not exist. The OSSEC installation directory is created, and the binaries and configuration files we complied are copied into their permanent location on the filesystem. The script then verifies and repairs permissions in the OSSEC installation directory to ensure a working installation. If everything completes successfully, the last step starts the OSSEC daemons and begins analyzing your logs.

It's important that system administrators are aware of the user and group creation as they might be utilizing configuration management software and may wish to create the users and groups prior to running the installation script. The users created are:

A single group named ossec containing all these users is also created.

The end result of the process is a default configuration of OSSEC. By now, OSSEC is already gathering log data and analyzing your filesystem.