Monitor and troubleshoot Linux disk usage with df, du, and ncdu.
Step 1: Check Filesystem Usage with df
Run df -h to see total, used, and available space on all mounted filesystems.
Step 2: Find Directory Sizes with du
Use du -sh /path/* to find which directories consume the most space.
Step 3: Interactive Analysis with ncdu
Install ncdu and run ncdu /var for an interactive disk usage browser.
df -i # check inode usage
ncdu --exclude /proc /Terminal screenshots are original illustrations created for Gnome IT Solutions (blog.gnomeitsolutions.com).