What communication command allows a user to communicate with another user logged on by splitting the screen and providing two way communication ?

The number of arguments can be known by which variable ?

UNIX is an example of :

What information does the who am i command display?

You want to declare a variable vs with the value hello. Which of the following declarations is correct ?

Which of the following is not a filter ?

Passwords may contain:

Listing directory trees recursively, in ls you use the flag:

A period, in a Unix file name:

If you execute the following, which users can read the file? chmod 060 file

If you wish to change both owner and group of a file in a two-step process, use these commands: