extract tar cli code example

Example 1: how to unzip Tar file

## Untar files in Current Directory ##
tar -xvf filename.tar.gz

## Untar files in specified Directory ##
tar -xvf filename.tar.gz -C /path_name_for_unzip/

-x : extract
-C : specified directory
-v : Verbosely show the .tar file progress.
-f : filename of archive file

Example 2: uncompress tar

tar -xvf filename.tar