Compress or expand files gzip foo.txt gunzip foo.txt zcat, gunzip, zless.

Options

Option	Long Option	Description
-c	–stdout	Write output to standard output
	–to-stdout	and keep the original files
-d	–decompress	Decompress.
	–uncompress	This causes gzip to act like gunzip
-f	–force	Force compression even if already compressed
-h	–help	Display usage information
-l	–list	List compression statistics for each file
-r	–recursive	If argument(s) is a directory, recursively compress files
-t	–test	Test the integrity of a compressed file
-v	–verbose	Display verbose messages while compressing
-number		Set the amount of compression.
		number is an integer 1-9 (fastest/worst -> slowest/best).
		Default value is 6.
		–fast and –best are 1 and 9 respectively