You should also understand a few simple commands.
When UNIX types a "%" at you, you can type a command.
For example, if you type "date" the computer will tell
you the current date and time. If you see "%" and type "who",
UNIX will tell you who is logged on at present. There are
many other commands, too. You must type a RETURN at the
end of each command line.
Try the "date" command now: find out what
date it is, and after the computer has responded, type "ready".
And don't forget the RETURN!
grep date .copy >/dev/null
You were supposed to type "date" (without quotes).
The computer is very intolerant of spelling errors.
Don't type those quote marks. Try again.
The time command does not tell you the wall-clock time.