What is owner and group? A user may be a member of multiple groups. A file is be owned by exactly one group and one user. If the user is a member of the file’s owner group (i.e., group foo owns the file and one of the user’s groups is foo ), then the respective group permissions apply to that user (unless overridden by the owner permissions).
How many group owners can a file have?
Permissions are listed below:
|permission||on a file||on a directory|
|r (read)||read file content (cat)||read directory content (ls)|
What is file group Linux? The /etc/group is a text file which defines the groups to which users belong under Linux and UNIX operating system. Under Unix / Linux multiple users can be categorized into groups. Unix file system permissions are organized into three classes, user, group, and others.
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.