Directory Size Command In Linux

You need to use the du command:

[a] Find and estimate file space usage.

[b] Summarize disk usage of each FILE/Directory/Folder.

[c] Shows the sizes of directories and files.

Syntax

The basic syntax is:

du

du dirName

du [options] dirName

Examples

Without any options, du command shows the names and used space for each directories including all sub-directories in the current directory:
du

Sample outputs:

Fig.01: du command in action

 

To find information about /etc and /home/nixcraft directory, enter:
du /path/to/dir

du /etc

du /home/nixcraft

du /root /home/nixcraft

Pass the -h option to get output in human readable format i.e. show output in kilobytes (K), megabytes (M) and gigabytes (G):
du -h /etc

du -h /dir1/file2

du -h /root

du -h


Sample outputs:

8.0K	./.vim
24K	./scripts
48K	./.ssh
16K	./.keychain
2.2M	./.lftp
2.4M	.

Pass the -s option to see the total disk space used by a directory:
du -sh

du -sh /etc/

du -sh /etc /home/ /securebackup/


Sample outputs:

4.1M	/etc
152K	/home/
902M	/securebackup/

Pass the -c to see a grand total for all of the files, type:
du -csh /root/ /etc/ /home/

Sample outputs:

2.4M	/root/
4.1M	/etc/
152K	/home/
6.6M	total

Directory Size Command In Linux