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| w | Prints a summary of current system activity. |
| wait | Waits until the termination of a process ID. |
| wall | Writes a message to all users that are logged in. |
| watch | Observes a program that may be untrustworthy. |
| wc | Counts the number of lines, words, and bytes in a file. |
| what | Displays identifying information in files. |
| whatis | Describes what function a command performs. |
| whatnow | Invokes a prompting interface for draft disposition. |
| whereis | Locates source, binary, or manual for program. |
| which | Locates a program file, including aliases and paths (the csh (C shell) command only). |
| which_fileset | Searches the /usr/lpp/bos/AIX_file_list file for a specified file name or command. This command only applies to AIX Version 4.2.1 or later. |
| who | Identifies the users currently logged in. |
| whoami | Displays your login name. |
| whois | Identifies a user by user ID or alias. |
| whom | Manipulates Message Handler (MH) Messages. |
| write | Sends messages to other users on the system. |
| writesrv | Allows users to send messages to and receive messages from a remote system. |
| wtmpfix | Manipulates connect-time accounting records by correcting date and time stamp inconsistencies. |
| wump | Starts the hunt the wumpus game. |
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