whoami

whoami
	coreutils whoami command
Developer(s)	Bill Joy, Richard Mlynarik, Intel, Microsoft, ReactOS Contributors, Novell
Operating system	Unix, Unix-like, iRMX 86, Windows, ReactOS, NetWare
Platform	Cross-platform
Type	Command
License	BSD: BSD License; coreutils: GPLv3; iRMX 86, Windows, NetWare: Proprietary commercial software; ReactOS: GPLv2

In computing, whoami is a command found on most Unix-like operating systems, Intel iRMX 86, every Microsoft Windows^[1] operating system since Windows Server 2003, and on ReactOS. It is a concatenation of the words "Who am I?" and prints the effective username of the current user when invoked.

Overview

The command has the same effect as the Unix command id -un. On Unix-like operating systems, the output of the command is slightly different from $USER because whoami outputs the username that the user is working under, whereas $USER outputs the username that was used to log in. For example, if the user logged in as John and su into root, whoami displays root and echo $USER displays John. This is because the su command does not invoke a login shell by default.

The earliest versions were created in 2.9 BSD as a convenience form for who am i, the Berkeley Unix who command's way of printing just the logged in user's identity. This version was developed by Bill Joy.^[2]

The GNU version was written by Richard Mlynarik and is part of the GNU Core Utilities (coreutils).

The command is available as a separate package for Microsoft Windows as part of the GnuWin32 project^[3] and the UnxUtils collection of native Win32 ports of common GNU Unix-like utilities.^[4]

On Intel iRMX 86 this command lists the currents user's identification and access rights.^[5]

The command is also available as part of the Windows 2000 Resource Kit^[6] and Windows XP SP2 Support Tools.^[7]

The ReactOS version was developed by Ismael Ferreras Morezuelas and is licensed under the GPLv2.^[8]

This command was also available as a NetWare-Command residing in the public-directory of the fileserver. It also outputs the current connections to which server the workstation is attached with which username.

Example

Unix, Unix-like

# whoami
root

Intel iRMX 86

--WHOAMI
USER ID: 5
ACCESS ID'S: 5, WORLD

Windows, ReactOS

C:\Users\admin>whoami
workgroup\admin

References

External links

whoami(1) – 4.2BSD General Commands Manual
whoami(1) – FreeBSD General Commands Manual
whoami | Microsoft Docs

[1] Microsoft TechNet Whoami article

[2] 2.9.1BSD Manual Page

[3] CoreUtils for Windows

[4] Native Win32 ports of some GNU utilities

[5] RMX™86 INTRODUCTION AND OPERATOR'S REFERENCE MANUAL For Release 6

[6] Windows 2000 Resource Kit Tool: Whoami.exe

[7] Windows XP Service Pack 2 Support Tools

[8] "Reactos/Reactos". GitHub. 3 January 2022.

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whoami

Overview

Example

Unix, Unix-like

Intel iRMX 86

Windows, ReactOS

See also

References

Further reading

External links

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