In Unix, what program creates a file with the extension .gz?

Newer versions of the gzip program use the .gz extension for compressed files. Older versions use .z . At Indiana University, gzip is installed on UITS shared Unix systems. See the documents listed below for details about using Unix compression utilities.

At Indiana University, to get support for personal or departmental Linux or Unix systems, see At IU, how do I get support for Linux or Unix?

Also see:

• In Unix, what kind of file ends in .tgz?
• In Mac OS and Mac OS X, is there a program to compress/decompress files with a .gz or .z extension?
• In Windows, how do I decompress a .gz file?
• In Unix, how do I create or decompress zip files?
• In Unix, how can I read a file that ends in .Z, .z, .gz, or .bz2?