The important thing here is to understand how to read the output. Note that you might not have these specific packages installed on your CentOS server. Let’s examine a small portion of the results in detail. We’re asking rpm to query all installed packages. Note the -q means “query” and -a means “all”. This command allows you to see every installed package on your system, along with the version that is currently installed: This first command uses the rpm package manager to poll for installed packages. For more information, see Logging into Your Server via Secure Shell (SSH). Let’s dig in! To use these commands, you’ll need to log in to your server via SSH. There are several ways to accomplish this, and we’ll discuss a few of them.

In this Liquid Web tutorial, we’re going to be discussing how to inspect packages installed on your CentOS system. You’ll need to know package names, version numbers, dates of installation, etc. While managing your server, you’ll sometimes need to check on which software (or packages) you have installed on your system.

Yum list installed packages