| technology | system admin - Michael Hess
This week: Linux File Permissions
To maintain proper security, users should have exactly the level of access that they need to do their jobs — no more, no less. That's why knowing how to manage and maintain file permissions is an understated, but incredibly important, skill. Knowing when to chmod versus chown or use a uid or gid is all part of the job.
This week, we give you a crash course in Linux permissions, executables, and the fundamentals of uid and gid.
When it comes to administering and securing Linux environments, understanding umask and file permissions is crucial. Learn how both these factor into Linux security.
Setuid and setgid are a way for users to run an executable with the permissions. Learn why they are so crucial and Linux admins can leverage them.
User identifier (uid) and group identifier (gid) are fundamental concepts that any Linux system administrator needs to know. Learn what they do and how they play a role in file permissions.