Ever wanted to know whats in a .tgz file before opening it up and expanding?
tar -ztvf <archive_name.tgz>
Once you have a list of whats in the archive, how about just extracting a single file from the archive?
# list the contents tar -ztvf wwwbackup.tgz # extract the file tar -zxvf wwwbackup.tgz <path_to_file>/index.php
