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Everything about User identifier

Value identifying a user account in Unix and Unix-like operating systems

In Unix-like operating systems, a user identifier is a value used to identify a user. The UID, along with the group identifier (GID) and other access control criteria, is used to determine which system resources a user can access. The password file maps textual user names to UIDs. UIDs are stored in the inodes of the Unix file system, running processes, tar archives, and the now-obsolete Network Information Service. In POSIX-compliant environments, the shell command id gives the current user's UID, as well as more information such as the user name and the primary and supplementary group identifiers (GIDs) and group names. Wikipedia →

đź§­ Start here: a 6-step reading path

  1. Read the overview: User identifierA 5-minute orientation
  2. Pick up a classic book: PsychologyThe most-reprinted book on the subject
  3. Read the landmark paper: Hierarchical Identifier: Application to User Privacy Eavesdropping on Mobile Payment AppCited 18 times
  4. Go sideways: Group identifierA closely related topic
  5. Go sideways: FstabA closely related topic

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🏆 Landmark papers (most cited)

📚 Books worth reading

Ranked by number of editions on Open Library, a rough measure of how lasting a book is.

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