How many group owners can a file have?
Permissions are listed below:
|on a file
|on a directory
|read file content (cat)
|read directory content (ls)
Who is owner of file? Initially, a file’s owner is identified by the user ID of the person who created the file. The owner of a file determines who may read, write (modify), or execute the file.
What are group permissions? The User Group Permissions screen allows you to assign or revoke permission belonging to user groups and to “embed” user groups (along with associated permissions) into other user groups. When users are associated with a user group, they “inherit” the permissions of the user group.
Can a directory have 2 owners? In the traditional Unix file permission system that’s not possible: a file has only a single owner. You could create a group containing just the two users that should have access and make that the owning group of the file (and give the desired permissions to that group).