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Hectal
Phase 7Advanced8 of 9 in Linux

Running Production Servers

Disk space, logs, scheduled jobs, and security hardening — the operational habits that keep a real server healthy long after the first deploy.

Getting an app running once is the easy part. This final phase covers what it takes to keep a server healthy over months and years: watching disk space and logs before they become emergencies, scheduling recurring jobs reliably, and hardening a server against the most common, most preventable security mistakes.

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5 topics ~64 min 11 code blocks & diagrams
Start with the first topic
1
7.1

Disk Space & Storage Management

A server that silently runs out of disk space fails in bizarre, hard-to-diagnose ways — df and du are the two commands that let you see a disk-space problem coming before it becomes an outage.

14 min 1 diagram 2 code practice

2
7.2

Logs & Basic Monitoring

tail -f, journalctl, and a handful of resource-monitoring commands are the difference between finding out about a problem from a user complaint versus catching it yourself first.

13 min 1 code practice

3
7.3

Cron & Scheduled Tasks

cron runs a command on a recurring schedule with zero manual intervention — the standard way anything needs to happen 'every night at 2am' or 'every 5 minutes' on a Linux server.

14 min 1 code practice

4
7.4

Basic Security Hardening

A handful of specific, well-known hardening steps — disabling root SSH login, keeping software updated, and limiting exposed services — close off the most common ways a real server actually gets compromised.

14 min 2 code practice

5
7.5

Disks, Partitions, Filesystems, Inodes, LVM & RAID

How a raw disk becomes a usable directory: devices and partitions, filesystems and mounting (including /etc/fstab), why a disk can be 'full' with free space left (inodes), resizing with LVM, and surviving disk failures with RAID.

9 min 1 diagram 3 code practice