Pro Linux system administration : learn to build systems for your business using free and open source software Part I. The Beginning 1. Introducing Linux 2. Installing Linux 3. Introducing VirtualBox Git and Vagrant 4. Linux Basics 5. Users and Groups 6. Startup and Services 7. Networking and Firewalls 8. Package Management 9. Storage Management and Disaster Recovery Part II. Making Linux Work for You 10. Infrastructure Services: NTP DNS DHCP and SSH 11. Web and SQL Services 12. Mail Services 13. File Sharing and Printing 14. Backup and Recovery 15. Networking with VPNs 16. Directory Services 17. Performance Monitoring and Optimization 18. Logging and Monitoring 19. Configuration Management This book aims to ease the entry of businesses to the world of zero cost software running on Linux. It takes a layered component based approach to open source business systems while training system administrators as the builders of business infrastructure