Master Linux Disk Space: Essential Commands to Analyze and Free Up Storage

ls -al

The ls -al command lists all files and directories in the current folder with detailed information; adding the -h flag makes sizes human‑readable, helping you spot large items at a glance.

stat

The stat command displays comprehensive metadata for a specified file or directory, including size, block count, inode number, and timestamps for creation, access, and modification.

df

The df (disk free) command reports available space on mounted filesystems. Common options include: df -h: display sizes in a human‑readable format. df -a: show all filesystems, even those with zero available space. df -T: include the filesystem type (e.g., ext4, xfs, btrfs). df -i: list used and free inodes.

For a graphical overview, the disks utility visualizes the same information in a user‑friendly window.

du

The du (disk usage) command reports the space consumed by files and directories. Frequently used forms are: du -h: show sizes in a human‑readable format for all directories and sub‑directories. du -a: list disk usage for every file in the current directory. du -s: display only the total size of the specified directory.

fdisk -l

The fdisk utility manages partition tables; the -l option lists partition details for all detected disks without modifying them. Use other options with extreme caution, as they can irreversibly alter partitions.

Summary

By mastering these commands— ls -al, stat, df, du, and fdisk -l —you can quickly assess disk consumption, identify large or unnecessary files, and safely reclaim space on Linux servers.