Ubuntu installs Hadoop solution to some problems

Issue 1: Installation of Openssh-server failed

Reason:

The following packages have unsatisfied dependencies: Openssh-server: dependent: openssh-client (= 1:5.9p1-5ubuntu1) But 1:6.1p1-4 is about to be installed                  recommended: Ssh-import-id But it will not be Install E: cannot fix the error because you require certain packages to remain current, that is, they destroy the dependencies between software packages

Solve:

First install a dependent version of Openssh-client (Legacy):

sudo apt-get install openssh-client=1:5.9p1-5ubuntu1

And then it's OK to install Openssh-server.

Question 2:

Ubuntu installs Hadoop solution to some problems