When you distribute *.tar.gz files, it is better to set everything owned by root/root. So that it doesn't keep the user name and user ID on your system. Here is an example.
tar -czvf github.tar.gz --owner=0 --group=0 github/
About the author
Xuan Ngo is the founder of OpenWritings.net. He currently lives in Montreal, Canada. He loves to write about programming and open source subjects.