1. Get familiar with programs getfacl and setfacl that you have heard about
   in the lecture. How does the output of getfacl look like for files and
   directories? How do you find out whether a mounted filesystem supports ACL?

2. Create a directory /home/kralikaren where the user 'zajac' can do
   whatever he wants. The user 'mrkva' should have the permissions to read,
   write and use this directory, the user 'kapusta' should only be be able
   to read and use the directory. The user 'hrach' should have no access at
   all. Permissions of other users should be unchanged.

3. Achieve that 'zajac' can read and write (and use) everything that will be
   created in kralikaren. The user 'mrkva' should be able to read and use
   such files and directories, but not to write to them.

4. How would you achieve (without having to change permissions of every user
   individually) that noone except the owner can (temporarily) write in
   kralikaren?

5. You have decided that the user 'hrach' should have the same permissions
   as other (not mentioned above) users. How will you achieve it?