linux I want to add permission on two groups

I have my owner (Pierre) and he has all permission on g586 folder, I have my first group (G586) have read permission, I have another groupe name (teacher) have read and execute permission, and other have no permission.

I have link Pierre as the owner of the folder, G586 as the group, I do a chmod 710 on my g586 folder, now I want to know how to add the right for the group teacher.

1

1 Answer

With UNIX permissions, every file or directory can only have one group, so if the group of the directory is g586, you cannot define permissions for group teacher.

One option would be to add user Pierre to group teacher as a supplementary group and use group teacher for the directory. Maybe you need to set the setgid bit for the directory to make sure all new files will belong to the same group.

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