A computing term for the group identification number obtained through system calls, used to identify which group owns or has access to files.
Compound of 'get' (Old English 'gietan') and 'id' (abbreviation for identifier, from Latin 'identitas'), created in 1970s Unix programming terminology.
This obscure command became foundational to computer security—every time your device checks if you're allowed to access something, it's using logic that flows from this simple idea of 'getting your group ID.'
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