Linux tar
From John Freier
Tar commands
Create an archive
To tar up a folder
tar -czf ./destination.tgz ./source/*
These options mean
c - create a new archive z - use gzip to compress the archive f - file
When using tar, these are the extensions.
*.tar - just archived no compression *.tgz - dos use to only allow three char extensions, so this is tar and gziped. *.tar.gz - modern extension for tar and gzip compressed.