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This section describes commands that print user-related information: logins, groups, and so forth.
| • id invocation: | Print user identity. | |
| • logname invocation: | Print current login name. | |
| • whoami invocation: | Print effective user ID. | |
| • groups invocation: | Print group names a user is in. | |
| • users invocation: | Print login names of users currently logged in. | |
| • who invocation: | Print who is currently logged in. |