$ sudo apt-get update
$ sudo apt-get install eclipse-mylyn-context-jdt 

eclipse-mylyn-context-jdt is installed in your system.

Make ensure the eclipse-mylyn-context-jdt package were installed using the commands given below,

$ sudo dpkg-query -l | grep eclipse-mylyn-context-jdt *

You will get with eclipse-mylyn-context-jdt package name, version, architecture and description in a table

eclipse-mylyn-context-jdt package basic information: