37 posts tagged with "Linux"

Your server is exposed to the internet with zero firewall rules — let's fix that in 10 minutes. Every Linux server connected to the internet gets hit with automated attacks within minutes of going online. A properly configured firewall is your first line of defense.

The server was acting weird for 3 days before it crashed — the logs told the story all along. Logs are the black box of your servers. If you can read them effectively, you can prevent outages instead of just reacting to them.

Your app crashes at 3 AM and nobody restarts it — systemd can fix that forever. Systemd is the init system and service manager on virtually every modern Linux distribution, and understanding it is non-negotiable for DevOps work.

Server says disk full but you see 50% free — here's what's actually happening. Disk management is one of those skills you don't think about until a production server runs out of space at 2 AM. Let's make sure you're ready when that happens.

Still typing passwords every time you SSH into a server? Still memorizing IP addresses? Still copying files with scp one server at a time? SSH is the most used tool in a DevOps engineer's arsenal, yet most people only use 10% of its power. Let's change that.

You SSH into the server every morning to rotate logs. You manually run backups every Friday. You check disk space by hand when you remember. Stop. Every repetitive task on a Linux server should be automated. Cron jobs are the oldest, simplest, and most reliable way to do it.