A .tar file, short for “tape archive”, is a type of file format used for archiving multiple files into a single file, often used in Unix-based operating systems for backup and distribution purposes.
Sometimes as you can see files with a slightly different archiving system such as a tar.bz2 or tar. Here are some quick commands for extraction:
|tar xf file.tar
|tar -zxvf file.tar.gz
|tar xjf file.tar.bz2