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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).

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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