Using the id command you can get the real and effective user and echo $UID id. This will return your user ID, group ID, and all your groups. useradd only uses the same UID and GID when either: So, I would guess that you have added other users and/or groups since you created. id command is use to reveal the UID and GID of a user. This command make us easier because we don't need to find it manually inside. To find a user's UID or GID in Unix, use the id command. At Indiana University, for personal or departmental Linux or Unix systems support. A user ID (UID) is a unique positive integer assigned by a Unix-like field contains the UID, and the fourth field contains the group ID (GID). The account configure files could be shared by any Linux machine in same privileges. you could make a copy to that machine to have a same user list by this . A UID (user identifier) is a number assigned by Linux to each user on the system. This number is used to identify the user to the system and to determine which. Unix-like operating systems identify a user by a value called a user identifier, often abbreviated to user ID or UID. The UID, along with the group identifier (GID) and other access control Linux also has a file system user ID (fsuid) which is used explicitly for access control to the file system. It matches the euid unless. I see the UID and all groups associated with a user name? uid=0(root) gid=0 (wheel) groups=0(wheel). I would like to know how to change a UID (USER ID)/GID (GROUP ID) and all belonging files on Linux operating system. Say, I want to change.