Terminology Index
Glossary
33 terms starting with "G"
Showing 1-32 of 33 terms
GID
Group ID: the numeric identifier for a group on a Linux/Unix system, used alongside the user ID to determine a process's group membership and the file permissions and privileges it has.
On Linux, every user belongs to groups identified by numeric GIDs, and a process carries a group identity that, with its UID, governs what files and resources it can access. Understanding GIDs helps defenders interpret a process's privileges and security context, investigate permission-related activity, and spot abuse such as a process running with an unexpected group or exploiting set-group-ID (SGID) binaries for escalation.
Introduced in: Operating Systems for Defenders
Examples
- A process's group membership determined by its GID affecting file access.
- Investigating why a process can read a file by checking its group ID.
- Recognizing an SGID binary that runs with a privileged group's GID.
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