Running out of local disk space on an Ubuntu workstation or laptop can cause system freezes, application update failures, and slow overall performance. While advanced Linux users frequently turn to terminal utilities like df, du, or ncdu to audit storage, Ubuntu comes pre-installed with an intuitive, highly visual graphical storage auditing tool: Disk Usage Analyzer (internally known as Baobab). It maps your drive into concentric rings or treemaps, making space-hogging directories identifiable at a glance.
Launching Disk Usage Analyzer
Accessing the tool requires no terminal commands or additional installations:
- Press the Super (Windows) key or click the Show Applications grid in the Ubuntu dock.
- Type Disk Usage Analyzer into the search bar.
- Click the pie-chart hard drive icon to launch the application.
- The home dashboard will display all local drives, partitions, and your personal Home folder alongside total capacity and percentage used.
Scanning Your Storage Drive
To inspect where your space has gone:
- Click on your Home folder (recommended for diagnosing personal downloads and cached files) or click on your primary Computer / root filesystem drive.
- The application will scan directory trees across your system. Depending on drive size and speed, this scan takes between 5 to 30 seconds.
- Once complete, the screen divides into two interactive panes: an indexed file tree on the left, and a vibrant multi-tiered graphic chart on the right.
Navigating the Rings Chart and Treemap
Understanding the visual breakdown allows you to hunt down storage culprits:
- Rings Chart: The center circle represents your root directory, while each radiating outer ring represents subfolders. The wider the arc angle of a wedge, the larger the folder is in gigabytes. Hover your mouse over any wedge to inspect folder names and exact byte sizes.
- Treemap View: Click the treemap toggle button in the top toolbar to switch to rectangular nested blocks, providing an alternative visual breakdown of space consumption.
- Drilling Down: Double-click any large ring or folder to zoom into that directory and inspect its internal contents.
Common Hidden Space Hogs in Ubuntu
When auditing disk usage, look specifically for these typical clutter zones:
~/.local/share/Trash:Deleted files that were never permanently emptied from the desktop Trash bin.~/.cache:Cached browser files, thumbnail databases, and software caches that can safely be cleared.~/Downloads:Outdated ISO installation images, extracted zip archives, and large video recordings./var/log:System logs that may have accumulated gigabytes during hardware debugging.
Safely Deleting Bulky Files from the App
When you spot an unwanted large file or forgotten movie download:
- Right-click the bulky item in the left-hand folder tree.
- Select Move to Trash.
- The file is moved to your desktop Trash bin immediately, reclaiming your disk capacity once the bin is emptied.