What is the size of a folder in Linux?

To view the file size of a directory pass the -s option to the du command followed by the folder. This will print a grand total size for the folder to standard output. Along with the -h option a human readable format is possible.

How many GB is my Linux directory?

Using the “-h” option with the “du” command provides results in “Human Readable Format“. This means you can see sizes in Bytes, Kilobytes, Megabytes, Gigabytes, etc.