======updates========== Update the Package Index : The APT package index is essentially a database of available packages from the repositories defined in the /etc/apt/sources.list file. To update the local package index with the latest changes made in repositories, type the following: sudo apt-get update Upgrade Packages : Over time, updated versions of packages currently installed on your computer may become available from the package repositories (for example security updates). To upgrade your system, first update your package index as outlined above, and then type: sudo apt-get upgrade ======change the IP address BEGIN========== 1. Login to the system and open up /etc/network/interfaces sub0@natty:~$ sudo nano /etc/network/interfaces 2. Modify the last line: iface eth0 inet static 3. Change the ip. The primary network interface auto eth0 iface eth0 inet static address 192.168.1.5 netmask 255.255.255.0 gateway 192.168.1.1 4. save it. and run sub0@natty:~$ sudo ifdown et