Updating ubuntu local server or main server

The location of update pages is specified in /etc/apt/(repositories).You need NOT to make any changes to this file until and unless you need extra repositories for your setup.If package is already installed it will try to update to latest version.First, open the Terminal application and type following two commands (Application Please note that above two commands will fetch files from the Internets or local mirrors.

: Install is followed by one or more packages desired for installation.If the security person asks if the organization is vulnerable, the admin should have one place where he/she can look up the CVE # (or whatever), and know the status of the managed clients.Andrew wants to ensure that all his Ubuntu machines are being patched with the security patches, but he wants to be able to test the -updates packages on his own personal workstation before he approves them to roll out over his entire network.The configuration parameters will be stored in /etc/postfix/file.

Later if you wish to re-configure a particular parameter, you can either run the command or change it manually in the file.

The Ubuntu Update Server (UUS) is a web based management tool that allows system admnistrators to deploy security updates and install packages to every machine in his control.