group permissions

Hello,
i'm new on this site and i'm new on Linux, so forgive my
questions...
Becoming from others OS don't understand the group permission on files and folder. Only one group can have permissions? If I have two different groups, how can decide the permission on both groups over the same file?
I can decide permissions for owner, owner group and others.
If I have a second group that is different from other categories, how can I do it?

Thanks!

 

You'd have to add all users from the second group to the first group.

 

Thanks, you confirm that on Linux we can't have a situation like this:
owner (rwx)
first group (r-x)
second group (rwx)
others (---)

on the same file.
In this case I can only change permissions to others in r-x and delete
the first group. Is OK? The constraint is that all people can read that
file.

Thanks,
leon247

 

That's right, this isn't possible.

You can make it world-readable, but you don't need to delete the first group.

 

multiple group permissions

You can't have more than 1 group in an ACL entry? I didn't know that. Explains a lot of problems.

Can 1 group be added to another group without listing individual names?

Does the same rule apply to being able to have mulitple users listed in an ACL ?

 

I think you're mixing up things. This thread is about file/directory ownerships.

 

I think you're mixing up things. This thread is about file/directory ownerships.