Disk Usage and Storage Info

Find what consumes space in the practice workspace.

Measure your practice folder and safely observe Ubuntu storage information.

Outcome: Storage commands become tools for understanding, not danger.

Mental model

Understand what is happening

du measures file/folder usage.

df reports filesystem free space.

lsblk and findmnt observe storage layout; they do not format anything.

Guided lab

Work through the mission

Measure sandbox

Safe

Shows size of the practice folder and its contents.

Terminal

cd ~/linux-practice
du -sh
du -sh * 2>/dev/null

Filesystem free space

Read-only

Shows root filesystem free space and type.

Terminal

df -h /
df -hT /

Observe block devices

Read-only

Reads storage and mount information only.

Terminal

lsblk
findmnt | head -20
mount | head -20

Checkpoint

Verify the mission

du identifies the largest practice item and df reports capacity.

Try it yourself

One step without a recipe

Find the largest top-level item in ~/linux-practice with du -sh *.

Need a hint?

When your disk feels full, start with `du -sh *` in the suspect directory. It shows you which folders are eating space. Then drill into the biggest one. Repeat until you find the culprit.

Explain it back

Before you move on

Which command summarizes folder size?
Which command shows filesystem free space?