Uncompressing files in linux

gzip Compressed files: 
.gz
.tar.gz
.tgz

To uncompress these files
$ gunzip file.gz
$ tar -zxvf file.tar.gz
$ tar -zxvf file.tgz

bzip Compressed files:
.bz2
.tar.bz2

To uncompress these files
$bunzip2 file.bz2
$tar -xvfj file.tar.bz2

xz Compressed files:
.xz
.tar.xz

To uncompress these files

$xz --decompress file.xz

$tar -xfvJ file.tar.xz

Uncompressing zip files

$unzip file.zip