Introduction: Administration Linux Debian | Ubuntu, Implementation Services PDC Server and Networking, BackUp Overnight, Web, FTP, DNS, Wins, DHCP, RAID 1 and 5, NFS, SAMBA, LDAP, CUPs print Server, Cluster Beowulf, pfSense Load Balancing with FailOver, Captive Portal, Proxy, Firewall, VPN, Nagios Core.