How do you disable, lock or blacklist certain package updates using apt tool in debian and ubuntu distributions.

APT means Advanced Packaging Tool is another package manager found on Linux based systems. Initially designed as a front-end for dpkg to work with .deb packages, apt has succeeded to show his visibility on Mac OS, Open Solaris etc.

In this article we will see various techniques to disable/lock package from install, upgrade and remove in Debian Linux and its derivatives such as Ubuntu and Linux Mint.