Following instructions from this link on my test machine.
https://docs.datastax.com/en/install/6.0/install/installDEBdse.html
root@pramod03:~# apt-get install dse-full=6.0.11-1 Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: dse-full : Depends: dse (= 6.0.11-1) but 6.7.7-1 is to be installed Depends: dse-libgraph (= 6.0.11-1) but 6.7.7-1 is to be installed Depends: dse-libsolr (= 6.0.11-1) but 6.7.7-1 is to be installed Depends: dse-libtomcat (= 6.0.11-1) but 6.7.7-1 is to be installed Depends: dse-liblog4j (= 6.0.11-1) but 6.7.7-1 is to be installed Depends: dse-libspark (= 6.0.11-1) but 6.7.7-1 is to be installed E: Unable to correct problems, you have held broken packages.
Don't understand why its asking some thing related to 6.7 although trying for 6.0