How to Quickly Find and Clean Large Files on Linux

Method 1: Using du to view directory/file sizes

The du command reports disk usage for files and directories. A basic usage is: du -h . To list only the top‑level subdirectories in a human‑readable format and sort them by size, combine it with sort and head:

du -h --max-depth=1 . | sort -hr | head -n 10

-h

: display sizes in KB/MB/GB. --max-depth=1: limit output to one level of subdirectories. sort -hr: sort numerically in reverse order, respecting human‑readable units.

Method 2: Using find to locate large files

The find utility can search for files exceeding a given size. For example, to find files larger than 100 MiB in the current directory tree:

find . -type f -size +100M

-type f

: restrict the search to regular files. -size +100M: match files larger than 100 MiB (use - for smaller, and units like k, G are also supported).

Method 3: Using ls to list large files

The ls command can sort files by size with the -S flag and show human‑readable sizes with -lh. To display the ten biggest entries: ls -lhS . | head -n 10 Example to list the top five largest files:

ls -lhS | head -n 5

-l

: long listing format. -h: human‑readable sizes. -S: sort by size, largest first.

Method 4: Using ncdu for an interactive view

ncdu

provides a curses‑based visual interface for disk usage analysis. Install it first:

sudo apt install ncdu   # Debian/Ubuntu

sudo yum install ncdu   # CentOS/RHEL

Optionally create an alias to replace the default du output with ncdu:

alias du="ncdu --color dark -rr -x --exclude .git --exclude node_modules"

Run the tool on a directory, e.g.: sudo ncdu /home/user The interface shows a tree of directories with size bars. Navigation:

Enter: drill down into a directory.

Left arrow or Backspace: go up one level. d: delete the selected file or directory (use with caution).

Conclusion

Effective disk‑space management is a routine operations task. The commands above— du, find, ls, and ncdu —cover most scenarios for locating and cleaning large files on a Linux system.