Sometimes, working with YUM – the default CentOS package manager – can feel unintuitive and cumbersome. Sure, it’s better than using the even more barebones RPM package manager, but it still leaves a lot to be desired. Take YUM’s “history” command, for instance. The idea of that command is to give you a general idea of what package operations you’ve carried out recently. So if you’ve been installing stuff, upgrading older packages, or updating CentOS itself, YUM will keep a record of it all.