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.
© 2020 Free Software Foundation, Inc. License GPLv3+:
GNU GPL version 3 or later
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
or available locally via: info '(coreutils) tty invocation'