Where are GIDs stored?

GIDs (Group Identifiers) are stored in the /etc/group file in Unix-like operating systems. This file contains information about all the groups on the system, including their names, GIDs, and the members of each group.

The format of each line in the /etc/group file typically looks like this:

group_name:password:GID:user_list

• group_name: The name of the group.
• password: An optional field for group passwords (usually not used).
• GID: The unique Group Identifier for the group.
• user_list: A comma-separated list of users who are members of the group.

For example:

developers:x:1001:user1,user2,user3

In this example, developers is the group name, 1001 is the GID, and user1, user2, and user3 are members of the group.

This file is essential for managing group permissions and access control in the system.