Advice for a New Linux SysAdmin: Tips to Avoid Common Mistakes

Hey, did your RHCSA certification help you in getting the job? Also, how did the interview process go? I’m curious about that! Good luck with everything.

Before making any major changes, snap a backup of your virtual machines. Save yourself the headache! Also, dive into automation and tools like Ansible or Puppet as early as you can; trust me, you’ll be using them. Can you share more about the specific LVM and CPU issues you're facing? What symptoms are showing up?

When you’re writing one-liners, always include an 'echo' command before anything that could be dangerous (like rm or userdel). It’s a good way to prevent accidental disasters!

Don’t shy away from breaking things in a production environment—it's a great way to learn. Focus on automation; the more you automate, the more valuable you'll become. Implement DevOps practices to streamline your system management. Just remember: always have a backup before making any changes.

First off, congrats on the new role! A huge part of not making rookie mistakes is using common sense. Even after 25 years, I still double-check that I’m in the right directory before executing any destructive commands. Ensure you don’t get pushed into doing unsafe operations without having them documented. Plus, learning scripting—especially bash and Python—is key. Tools like Ansible are super helpful for automation, and definitely get comfortable with cloud technologies. Backup your files before any changes. Good luck!