vt. 1. To type to a terminal.
"To list a directory verbosely, you have to say 'ls -l'."
Tends to imply a newline-terminated command (a 'sentence').
2. A computer may also be said to 'say' things to you, even if it doesn't have a speech synthesizer, by displaying them on a terminal in response to your commands. Hackers find it odd that this usage confuses mundanes.