wall

Question 1

wall

Answer 1

(Write to all) Used to display contents of a file or standard output to all logged in users.

Question 2

wall -n

• t
• g
• V

Answer 2

• n, –nobanner, Suppress the banner
• t, –timeout, Abandon write attempt after timeout seconds
• g, –group, Limit printing message to members of group
• V, –version, Display version information and exit