Ubuntu administrator to modify the password and login in xshell

A. Ubuntu open port 22

　　sudo apt-get install openssh-server　　下载ssh

　　systemctl ssh start to open

Two. Ubuntu root password initialization

　　sudo passwd root

Three. Ubuntu login root on xshell

　　vi / etc / ssh / sshd_config commented PermitRootLogin prohabit-password

　　Add PermitRootLogin yes

　　Restart /etc/init.d/ssh restart