How to check disk space in Linux command line
Sep 21, 2025 am 04:46 AM
To check disk space on Linux, use df -h for an overview of storage, du -sh to find directory sizes, lsblk to list block devices, or install ncdu for an interactive analysis. These tools help monitor and manage disk usage efficiently.
If you need to check disk space usage on a Linux system, the command line offers several straightforward tools. Here's how to do it:
The operating environment of this tutorial: Dell XPS 13, Ubuntu 22.04
1. Use the df Command
The df command displays the amount of disk space used and available on mounted filesystems. It provides a high-level overview of storage across all mounted partitions.
- Type df -h to view disk space in human-readable format (KB, MB, GB).
- Add the -T flag (df -hT) to show the filesystem type (e.g., ext4, xfs).
- To display information for a specific mount point, run df -h /path/to/directory.
2. Use the du Command
The du command estimates file and directory space usage. It is useful for identifying which directories are consuming the most space.
- Run du -sh /path/to/directory to get the total size of a specific directory.
- Use du -h --max-depth=1 /home to list the sizes of immediate subdirectories within /home.
- Add the --exclude option to skip certain file types, such as du -sh --exclude="*.log" /var.
3. Check Disk Usage with lsblk
The lsblk command lists block devices, showing disks and their partitions in a tree-like format, including size and mount points.
- Enter lsblk to view all block devices and their hierarchy.
- For byte-sized output, use lsblk -b.
- To include filesystem labels, run lsblk -f.
4. Use the ncdu Interactive Tool
ncdu is a curses-based version of du that provides an interactive interface for browsing disk usage and is especially helpful on remote servers.
- Install it using your package manager: sudo apt install ncdu on Debian/Ubuntu systems.
- Analyze a directory with ncdu /path/to/directory.
- Navigate using arrow keys, press d to delete files, or q to quit.
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