Two things relevant to hw #4:

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admin group:
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It is possible that you won't have an "admin" group on your machine -
as default groups are not standard. Here are three possible ways that
would all be acceptable for answering the questions that have to do
with the admin group (Task 2, #4 & 7). Note that while it is most
useful for you to be able to try out the actual commands, if you
cannot get any of these options to work for you then feel free to just
write what you think the command *should* be:

1. Use a group other than admin: Use the groups command to find out
which groups you belong to on your local Linux machine.  If there is
more than one group there, you can use one of the groups that is not
your default group to test your commands.  You can find out your
default group by doing a "touch" to create a file, then do ls -l to
see the associated group - the group listed is your default group, so
you will want to use one of the other groups you found with the groups
command to do Task 2, #4 and 7.

2. Use ugrads_cs or ugrads_ce or another group you are a member of on
attu: Log onto attu, make a directory for your hw4, untar the
hw4.tar.gz there, and use the ugrad_cs or ugrad_ce group or antoher
group you are a member of on attu.  Just be careful to be in the
correct directory before you start testing your commands on attu.
This approach will probably only be interesting if you are a member of
more than one group on attu, otherwise the files will already be in
your default group - which is probably ugrads_cs or ugrads_ce.

3. Add the admin group to your local VM:

First add the admin group using:

    sudo groupadd admin

Then add your user to that group using:

    sudo usermod -aG admin <username>

You might have to log off and log back on for the new group to take
affect.  I don't suggest this option if you feel uncomfortable
modifying your own Linux machine's users and accounts.  This option
requires you to know the root password.

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sudo
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Also, note that you may or may not have sudo on the system you are
using, in which case it is fine to use su root instead.  Just remember that
you need to give a single bash statement to answer each question.

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Let me know if you have questions!

Ruth