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 –
Can gzip compress several files into a single archive?
Not directly. You can first create a tar file then compress it:
tar cvf – filenames | gzip > file.tar.gz