tar gzip 怎么一起使用！

How can I extract a tar.gz or .tgz file?
Files with extension tar.gz or .tgz are tar files compressed with gzip. On Unix extract them with:

    gunzip < file.tar.gz | tar xvf -
    gunzip < file.tgz    | tar xvf -

If you have GNU tar you can use the z option directly:

    gtar xvzf file.tar.gz
    gtar xvzf file.tgz


Can gzip compress several files into a single archive?
Not directly. You can first create a tar file then compress it:

    for GNU tar:   gtar cvzf file.tar.gz filenames
    for any tar:   tar cvf -  filenames | gzip > file.tar.gz

Ref: http://www.gzip.org/