mesg
controls whether other users can send messages to your terminal using
TLDR
Check current status
$ mesg
Disallow messagescopy
$ mesg n
Allow messagescopy
$ mesg y
Enable verbose modecopy
$ mesg --verbose
copy
SYNOPSIS
mesg [y | n]
DESCRIPTION
mesg controls whether other users can send messages to your terminal using the write command. Without arguments, it displays the current setting.
PARAMETERS
y
Allow messages from other usersn
Disallow messages from other users-v, --verbose
Print warning if not executed from terminal
OUTPUT
Without arguments shows:is y: Messages allowedis n: Messages disallowed
CAVEATS
Affects the current terminal only. Setting is not persistent across sessions. Some terminals may default to denying messages.