file permissions

Anil ask a question (via email):

What is umask and how is it determined on a Linux system?

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From my mailbag: Q. How do I password protect files? Linux and other Unixish oses offers strong file permissions and ACL (access control list) concept in Linux/UNIX computer security used to enforce privilege separation. However, none of them offers a password to protect files. You can use GNU gpg (GNU Privacy Guard) encryption and signing […]

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