What are three types of permissions in Linux?
- Read (r) : The read permission allows you to open and read the content of a file.
- Write (w) : The write permission allows you to edit, remove or rename a file.
- Execute (x): In Unix type system, you can’t run or execute a program unless execute permission is set.
What are two types of Linux users? In Linux, there are two types of users: system users and regular users. Traditionally, system users are used to run non-interactive or background processes on a system, while regular users are used for logging in and running processes interactively.
What are four basic permissions? There are four categories (system, owner, group, and world) and four types of access permissions (Read, Write, Execute and Delete). The categories are not mutually disjoint: World includes Group, which in turn includes Owner.
Can a group own a file? File Ownership
Every file is owned by a specific user (or UID) and a specific group (or GID). The chown command can be used to change just the user, or the user and group of a file.