Unix Exercise - 'chmod'

[AxlD]

Hello,

due to an exercise in Operating Systems I have to do the following:
There are 6 users, user1, user2 ... user6 with home directories /users/user1 ... users/user6. User1 to user3 belong to group1, user4 to user6 belong to group2. The System Administrator wants to change the privilege* only to users 1, 2 and 3 to execute the file /bin/xxx. Which are the commands he has to type in order to achieve the previous?

*I'm not sure if this is the right translation.

What I have come till now is:

$ chgrp group1 <name_of_file>

but it seems too simple to be right.

Any recomendations?

Thank you in advance and excuse my english.

p.s. I hope I chose the correct category to post this thread.

[Cabhan]

Hello. I'm sorry to say that homework problems are not allowed on these forums, so I will have to close the thread.

If you have more specific questions in the future that aren't homework assignments, please feel free to ask then.