tty – print the file name of the terminal connected to standard input
Print the file name of the terminal connected to standard input.
-s, –silent, –quiet
print nothing, only return an exit status
display this help and exit
output version information and exit
Written by David MacKenzie.
Copyright © 2017 Free Software Foundation, Inc. License GPLv3+:
GNU GPL version 3 or later http://gnu.org/licenses/gpl.html;.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
Full documentation at: http://www.gnu.org/software/coreutils/tty; or available locally via: info ‘(coreutils) tty invocation’