Troubleshooting - Warning: Possible Dns Spoofing Detected!

Sometimes, when logging into another computer, you'll get a scary looking warning like: Warning: Possible Dns Spoofing Detected! Although this looks bad, all it probably means is that the IP address of the computer you're trying to log into has changed. Because we use DHCP, this can happen every time a computer reboots. To fix the problem, delete the appropriate lines out of the ~/.ssh/known_hosts files.

Enable IPv6 for Server

We can check the current state of the IPv6 address configuration by typing: $ ip -6 addr show eth0 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000 inet6 2604:a880:400:d0::218:2001/64 scope global valid_lft forever preferred_lft forever inet6 fe80::601:c0ff:fea1:4101/64 scope link valid_lft forever…