How to check disk space usage on Ubuntu

How to check what is taking up all the disk space on Ubuntu

Here are a few things you can try:

Note: Depending on the size, these commands can take a while to complete.

1) Run df command:

df -h /

2) Run du command:

du -hs /

If it takes a long time, you can try checking sub directories instead to narrow down the issue:

du -hs /var/log
du -hs /var/www
du -hs /opt

sudo du -h --max-depth=1 / | sort -hr | head -n 10
sudo du -h --max-depth=1 /var/lib | sort -hr | head -n 10

3) Run ncdu command:

apt update
apt install ncdu
ncdu /

4) If docker is taking up the space:

Check with du and sort it:

sudo du -h --max-depth=1 /var/lib/docker | sort -hr | head -n 10
sudo du -h --max-depth=1 /var/lib/docker/containers/ | sort -hr | head -n 10

Docker Disk Space Commands Cheat Sheet:

Command	Description
docker system df	Show Docker disk usage
docker system prune	Clean up Docker system
docker container prune	Remove unused containers
docker image prune	Remove unused images
docker volume prune	Remove unused volumes
docker network prune	Remove unused networks
docker builder prune	Remove unused build cache