Print file name of terminal on standard input, print the file name of the terminal connected to standard input. It prints `not a tty’ if standard input is not a terminal.

      tty [option]...


           Print nothing; only return an exit status.

 Exit status:

     0 if standard input is a terminal
     1 if standard input is not a terminal
     2 if given incorrect arguments
     3 if a write error occurs

Related linux commands:

env – Display, set, or remove environment variables
hostname – Print or set system name
id – Print user and group id’s
logname – Print current login name
uname – Print system information
users – Print login names of users currently logged in
who – Print who is currently logged in
whoami – Print the current user id and name (`id -un’)
Equivalent Windows command: SET %COMPUTERNAME%

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