Real-Time Linux Troubleshooting – Disk Space Full

Real-Time Linux Troubleshooting – Disk Space Full

One of the most common production issues in Linux environments is Disk Space Full. When disk space reaches 100%, applications may stop working and system performance can degrade.

Here is my troubleshooting approach as a Linux Administrator:

🔎 Step 1: Check Disk Usage

Command:
"df -h"

This command shows the disk usage of all mounted filesystems.

🔎 Step 2: Identify Large Directories

Command:
"du -sh /*"

This helps find which directory is consuming the most disk space.

🔎 Step 3: Drill Down Further

Example:
"du -sh /var/*"

Usually directories like /var/log, /tmp, or application logs consume large space.

🔎 Step 4: Check Large Files

Command:
"find / -type f -size +500M"

This helps locate very large files.

🔎 Step 5: Clean Up Space

Possible actions:
• Remove old logs
• Clear temporary files
• Rotate logs
• Archive unnecessary files

💡 Key Learning:
Regular monitoring of disk usage helps prevent production outages and improves system stability.