Reported this week delayed a couple of days.
This week driving test because less learning time, mainly just completed the installation of Hadoop family environment.
Hadoop as a cross-platform distributed architecture, based on java language, the most suitable operating environment and is a Linux system, so my computer need to install the virtual machine to install java virtual machine to complete the build environment.
Briefly installed virtual machine, I used the desktop version of Ubuntu version 18.04.2, which can also be very convenient visualization.
After adding a hadoop user name used to run the program. (Sudo has been added into the list)
Installed java-jre and jdk no problem (the default is actually java11), Next to begin configuring ssh login.
After installing ssh-server, generating a blank password sshkey, id_rsa.pub authorized_keys file is appended to the unit, the achieved without ssh login password.
Here is the installation of Hadoop-3.1.2 (not clear whether the issue will be used)