in ODOC

ODOC: wall

wall — Send a message to everybody’s terminal.

Summary :

Wall sends a message to everybody logged. The length of the message is limited to 20 lines. You MAY need root permission, on some system, to run this command. This command is used to pass the some critical information to all.

Examples :

# wall “Welcome” — Send the string “Welcome” to all.

# wall

Read : man wall

Tech Tags: linux