List the Size of Each File and Directory and Sort by Size in Linux

Listing and sorting files and directories by size is essential for system administration, disk space management, and file organization. Linux provides multiple command-line tools and GUI methods to accomplish this task efficiently. This guide covers various approaches to list files and directories sorted by their size.

Command Line Methods

Using the ls Command

The ls command is the most common tool for listing directory contents. By default, it sorts entries alphabetically, but you can modify this behavior with specific options.

Basic listing with detailed information:

ls -la

This displays all files (including hidden ones) with detailed information like permissions, size, and modification date.

Sort by size (largest first):

ls -laS

total 180
-rw-------  1 user user 18171 Mar  6 18:03 .bash_history
-rw-r--r--  1 user user 11517 Feb 25 23:35 data.pcap
-rw-------  1 user user 10422 Feb 12 13:46 .viminfo
drwxr-xr-x  4 user user  4096 Feb 18 23:38 Documents
drwxr-xr-x  2 user user  4096 Feb 20 13:09 Downloads
-rw-rw-r--  1 user user   724 Feb 27 21:25 example.txt
-rwxrwxr-x  1 user user    88 Mar  3 18:00 script.sh

Sort by size (smallest first):

ls -laSr

Human-readable sizes:

ls -laSh

total 172K
-rw-------  1 user user  18K Mar  6 18:03 .bash_history
-rw-r--r--  1 user user  12K Feb 25 23:35 data.pcap
-rw-------  1 user user  11K Feb 12 13:46 .viminfo
drwxr-xr-x  4 user user 4.0K Feb 18 23:38 Documents
-rw-rw-r--  1 user user  724 Feb 27 21:25 example.txt
-rwxrwxr-x  1 user user   88 Mar  3 18:00 script.sh

Exclude directories from listing:

ls -laSh | grep -v '^d'

Using the du Command

The du (disk usage) command shows the actual disk space used by files and directories, which is more accurate for space management.

Sort all files and directories by size:

du -ah | sort -h

4.0K    ./config/settings.conf
8.0K    ./logs/error.log
12K     ./data/backup.tar
24K     ./scripts/
48K     ./documents/report.pdf

Limit depth and sort by size:

du -ah --max-depth=1 | sort -hr

Sort only directories:

du -h | sort -hr

Using the find Command

The find command offers more flexibility for locating and sorting files based on various criteria.

Find and sort files by size:

find . -type f -ls | sort -k7 -nr

Find and sort directories only:

find . -type d -ls | sort -k7 -nr

Common Options Summary

GUI Method

Linux file managers provide an intuitive way to sort files and directories by size. In most file managers:

• Open the file manager and navigate to your desired directory

• Click on the column headers or use the view menu

• Select "Sort by Size" to arrange files from largest to smallest

• Click again to reverse the order (smallest to largest)

Practical Examples

Find largest files in home directory:

find ~ -type f -exec du -h {} + | sort -hr | head -10

Show directory sizes sorted by usage:

du -sh */ | sort -hr

List files larger than 100MB:

find . -type f -size +100M -exec ls -lh {} + | sort -k5 -hr

Conclusion

Linux offers multiple powerful methods to list and sort files by size using command-line tools like ls, du, and find, each with specific advantages. The ls command is ideal for quick directory listings, du provides accurate disk usage information, and find offers advanced filtering capabilities. GUI file managers provide an accessible alternative for users preferring graphical interfaces.