How to Enable SSH root login on Ubuntu Server

• Change your root user password :-

        ==> sudo passwd root

• Open the sshd_config file :-

        ==> sudo nano /etc/ssh/sshd_config

• Find the following line in sshd_config :-

        ==> PermitRootLogin prohibit-password

• Change the following line :-

        ==> PermitRootLogin yes

• Then restart the ssh service :-

        ==> sudo /etc/init.d/ssh restart

How to change Ubuntu from DHCP to Static IP Address

• Open the /etc/network/interfaces file :-

        ==> sudo nano /etc/network/interfaces

• You can see the following lines in interfaces file :-

        ==> auto eth0
                iface eth0 inet dhcp

• Change the following lines :-

        ==> auto eth0
                iface eth0 inet static
                address 192.168.1.11
                netmask 255.255.255.0
                network 192.168.1.0
                broadcast 192.168.1.255
                gateway 192.168.1.1
                dns-nameservers 8.8.8.8

• Then reboot the server.