====== Tar / Untar ======
<code bash>tar -zcvf archive-name.tar.gz directory-name</code>

Where,
    *-z : Compress archive using gzip program in Linux or Unix
    *-c : Create archive on Linux
    *-v : Verbose i.e display progress while creating archive
    *-f : Archive File name
For example, say you have a directory called /home/jerry/prog and you would like to compress this directory then you can type tar command as follows:
<code bash>$ tar -zcvf prog-1-jan-2005.tar.gz /home/jerry/prog</code>
Above command will create an archive file called prog-1-jan-2005.tar.gz in current directory. If you wish to restore your archive then you need to use the following command (it will extract all files in current directory):
<code bash>$ tar -zxvf prog-1-jan-2005.tar.gz</code>
Where,
    *-x: Extract files from given archive
If you wish to extract files in particular directory, for example in /tmp then you need to use the following command:
<code bash>
$ tar -zxvf prog-1-jan-2005.tar.gz -C /tmp
$ cd /tmp
$ ls - 
</code>