There is a new version of this tutorial available for Ubuntu 22.04 (Jammy Jellyfish).

Installing Webmin On Ubuntu Feisty Fawn (7.04) - Page 3

Attempting to start Webmin mini web server..
Starting Webmin server in /opt/webmin/webmin-1.360
Webmin has been installed and started successfully. Use your web
browser to go to
and login with the name and password you entered previously.
Because Webmin uses SSL for encryption only, the certificate
it uses is not signed by one of the recognized CAs such as
Verisign. When you first connect to the Webmin server, your
browser will ask you if you want to accept the certificate
presented, as it does not recognize the CA. Say yes.
[email protected]:/opt/webmin/webmin-1.360$

Thunderbirds Are Go ... Or At Least Webmin Is

Being the paranoid person I am I rebooted my linux box in order to see there were no errors after the install had completed. It also ensures that the service is starting automatically after a server restart. For me, the reboot went successfully. For you it will hopefully do the same. However, if you are on a live system ... do not reboot unless you want the wrath of users to fall on you hard.

sudo reboot
Broadcast message from [email protected] (/dev/pts/1) at 7:05 ... The system is going down for reboot NOW!

Alternatively you can check that webmin is running correctly (without rebooting) by running the following command:

sudo /etc/init.d/webmin status

Which should show something like

webmin (pid 4326) is running

To check it is listening on the correct port (23646 in this case):

sudo netstat -tap
tcp 0 0 *:23646 *:* LISTEN 4326/perl

So What Are You Waiting For?

Log in and use it:
Copy this url into your web browser:

You should see the following screen 

Webmin SSL Cert
SSL Cert Confirmation

Accept it and click OK.

The logon screen should appear. 

Webmin Logon Screen

Enter your details:

        User: admin
        Password: myS3cr3t

Please note: If you use the following message will appear:

Error - Bad Request
This web server is running in SSL mode. Try the URL instead.
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