Extracting Files:
tar xvjf FILE.tar.bz2
tar xvzf FILE.tar.gz
tar xvJf FILE.tar.xz
tar xvf FILE.tar
tar xvzf FILE.tgz
tar xvjf FILE.tbz2
gunzip FILE.gz
unxz FILE.xz
unlzma FILE.lzma
bunzip2 FILE.bz2
unrar x -ad FILE.rar
unzip FILE.zip
uncompress FILE.Z
7z x FILE.7z

Compressing Files:
tar cvzf FILE.tgz files
tar cvfj FILE.tar.bz2 files