Managing ownership represents only a part of what needs to be done to control access to files and directories in the Linux file system. Ownership only specifies who owns what. It doesn’t say what you can or can’t do with files and directories. To do this, you need to set up and manage permissions. You need to understand the following:
• How permissions work
• Managing permissions from the command line
• Working with default permissions
• Working with special permissions
Let’s start by explaining how permissions work.
Unlike ownership, permissions are used to specify exactly what a particular user may do with files and directories in the file system. These permissions may allow a user ...