DebianPackage Management Problems

DebianPackage management problem-Debian information of the Linux release-details are as follows. First APT use reference: http://www.mayin.org/ajayshah/COMPUTING/debian-principles.html

Because the system is installed on a DVD, the packages information is not updated on the network each time apt-get update is used. As a result, new software cannot be installed, the old ones are installed on the CD.

For example, I want to install javasos5, And the disc is javasos4. Version 4 has obvious security problems.

How can this problem be solved?

$ Cp/etc/apt/sources. list/etc/apt/sources. list. back
$ Vim/etc/apt/sources. list

Delete all previous items and change them:

# See sources. list (5) for more information
Deb http://http.us.debian.org/debian stable main contrib non-free
Deb http://non-us.debian.org/debian-non-US stable/non-US main contrib non-free
Deb http://security.debian.org stable/updates main contrib non-free

Deb http://http.us.debian.org/debian testing main contrib non-free
Deb http://non-us.debian.org/debian-non-US testing/non-US main contrib non-free
Deb http://security.debian.org testing/updates main contrib non-free

Maybe your stable version uses "Example-stable"

OK. Now you can install the new version.

$ Apt-get update
$ Apt-get krb5 *

You can use # dpkg-l to verify the installation.