Problem
1. What is the difference between a password and a passphrase? Why is it necessary to have a passphrase?
2. Using scp, how will you noninteractively copy all files from juliet's home directory on host saturn without knowing the absolute pathname of her home directory?
3. What does this command do? ssh jupiter date \> .date.
4. How does X solve the problem of running the same program on different displays with different characteristics?