I've done some (ok, very little) writing for opensource.com in the past and I still have some notes for more articles that keep getting pushed aside. This site is almost 10 years old, community driven (with Red Hat Sponsorship), and tries to cover a variety of open topics, products, projects, and distributions.
This summer, some of the staff from that project switched over to help Red Hat start a new blog for system administrators called Enable Sysadmin. As the name implies it is focused on system administration topics and as a corporate blog it can also be a bit more Red Hat product specific. In addition to a small staff, a few part time contractors, and a number of Red Hat employee contributors, they do accept and encourage community contributions.
I have enjoyed being one of the early authors. Of course, like all my writing projects, I have plenty more ideas in my head and not enough focus to get them organized in a timely manner.
So far I have written two articles about using SSH keypairs, two articles about SELinux, and a short article about cybersecurity awareness month.
How to manage multiple SSH key pairs
Passwordless SSH using public-private key pairs
Accessing SELinux policy documentation
Four semanage commands to keep SELinux in enforcing mode
Security advice for sysadmins: Own IT, Secure IT, Protect IT