If you’ve ever worked under unix environment before, you’d come across the terms 644 or 777 regarding file permissions. Even if you’ve only been installing some scripts through FTP, surely you’ve been asked to set the file permission to some files or directory.

Anyway, to raise your geek class to another but slightly higher level, you can learn all about these file permissions under *nix and finally start to understand all these 3-digit talk.

The following article on file permissions is easily understandable for beginners.

Link : Understanding file permissions