Change Debian server hostname

Executing the command hostname newHostName alone, apparently, is not enough.

To change the hostname:

1.  Edit /etc/hostname using your favorite text editor. Mine is vi improved vim.

2.  Change the old host name into the new host name in /etc/hosts.  Usually the second line that states oldHostName

3. Issue the command hostname newHostname

4. Log out and then log back in.  No need to restart.

This also works on Debian-based distributions like Ubuntu and Linux Mint.

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