zcmp command  Both Linux and Unix like operating systems comes
with z* commands. These command allows you to read gzip
compressed text files using zless, zcat, zmore and friends
command. The gzip command reduces the size of the files using
Lempel-Ziv coding (LZ77). Whenever possible, each file is
replaced by one with the extension .gz, while keeping the same
ownership modes, access and modification times. z* commands has
some cool usage too; such as display the current time in
different zonename.