CentOS

There are a few (semi)official cheat sheets from Red Hat/Fedora I know of. But I've never seen them listed together anywhere. So let the collective mind check if I missed some.

• Common administrative commands in Red Hat Enterprise Linux 5, 6, 7, and 8. I also annotated it with some additions/corrections here.
• Fedora's SysVinit to Systemd Cheatsheet
• systemd Cheat Sheet for Red Hat Enterprise Linux 7
• Yum Command Cheat Sheet for Red Hat Enterprise Linux
• ip Command Cheat Sheet for Red Hat Enterprise Linux
• Red Hat Developer cheat sheets require login to download, but some of them may be freely downloaded from here, or from there, or from Cheatography.

These are probably not relevant for CentOS, but still

• Subscription-Manager Command Cheat Sheet for Red Hat Enterprise Linux
• Hammer cheat sheet