How to find out what is taking up space on the disk if the disk is 89% full?

To determine what is taking up space on the disk when it is 89% full, you can use commands to analyze disk usage:

• In Linux/Unix systems:
  • du -h --max-depth=1 /path/to/directory — shows the size of each folder in the specified directory.
  • du -sh * — total size of all files and folders in the current directory.
  • ncdu — an interactive tool for analyzing disk space.
  • df -h — shows the overall disk usage status.

Example:

# Check disk usage
df -h

# Analyze folder sizes in root
sudo du -h --max-depth=1 /

# For more detailed analysis
sudo du -ah / | sort -rh | head -n 20

This way, you can identify large files and folders that occupy a lot of space and decide on cleaning or moving them.