System:
- Hardware basics:
- Package management:
- Administering the System
- Securing the System
- Encryption methods
- TLS/SSL
- Administering network security
- Administering local security
- Booting and init process
- Linux boot process
- Bootloaders
- GRUB2
- GRUB Legacy
- Stopping the system
- Notifying the users
- Linux Networking
- Networking basics
- Configuring network features
- Basic network troubleshooting
- Advanced Network troubleshooting
- Managing files
- Hard links
- Soft links
- Managing file ownership
- Controlling access to files
- Locating files
- Firewalls