How do I see du in GB instead of MB in linux?

Solution 1:

GNU du has the --block-size option:

du -csh --block-size=1G .

As sajb noted, omitting the block size argument will automatically scale the output (and display the unit). Using any block size argument displays the number but omits the unit.

Solution 2:

For convenience, here's reference for macOS:

• -h "Human-readable" output. Use unit suffixes: Byte, Kilobyte, Megabyte, Gigabyte, Terabyte and Petabyte.
• -k Display block counts in 1024-byte (1-Kbyte) blocks.
• -m Display block counts in 1,048,576-byte (1-Mbyte) blocks.
• -g Display block counts in 1,073,741,824-byte (1-Gbyte) blocks.

Here is how the various options work given a 1,234,567 KB file:

$ mkfile -n 1234567k file.txt

$ du file.txt
2469136 file.txt

$ du -k file.txt
1234568 file.txt

$ du -m file.txt
1206    file.txt

$ du -g file.txt
2   file.txt

$ du -h file.txt
1.2G    file.txt

Also worth noting, you can configure implicit behaviour though the BLOCKSIZE environment variable:

BLOCKSIZE If the environment variable BLOCKSIZE is set, and the -k option is not specified, the block counts will be displayed in units of that size block. If BLOCKSIZE is not set, and the -k option is not specified, the block counts will be displayed in 512-byte blocks.