This is our second post on compression and archiving series. Today we will see how to use gzip and gunzip commands with examples. Gzip(GNU zip) is a compress tool which is available in most of the Linux/Unix based operating systems. Until recent years gzip and bzip2 are most commonly used data compression tools in Linux/Unix. Though gzip compress ratios are not good when compared to bzip2 but it is popular among masses. Gzip software uses Lempel-Ziv coding (LZ77) algorithm for compressing data. In this post we will see how to install, use as well as tips about gzip command.