TOPIC 5- Security and File permissions
A Linux server is usually has a lot of users, so it is important to manage who can access which files and what can he do.
5.1 Basic Security and Identifying User Types
- Accounts
- Getting Information About Your Users
- Switching Users and Escalating Privilege
- Access Control Files
5.2 Creating Users and Groups
- The File /etc/passw
- The File /etc/group
- The File /etc/shadow
- The File /etc/gshadow
- Adding and Deleting User Accounts
- The Skeleton Directory
- Adding and Deleting Groups
- The passwd Command
5.3 Managing File Permissions and Ownership
- Querying Information about Files and Directories
- What about Directories?
- Seeing Hidden Files
- Understanding Filetypes
- Understanding Permissions
- Modifying File Permissions
- Modifying Directory Permissions
- Symbolic Mode
- Numeric Mode
- Modifying File Ownership
- Querying Groups
- Special Permissions