How to Install Webmin on Rocky Linux 8

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Webmin is a web-based dashboard that allows sysadmins to manage Linux and Unix-like systems (especially servers). Webmin allows system administrators to manage user accounts, update packages, system log files, configure firewalls, email, database, postfix, etc.

First, check for any pending system updates,

dnf update

At the time of writing this article, version 1.997 is the latest. You can check and download the latest version of .rpm source file from their official site.

Download and Install Webmin

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We will download using wget command as shown below,

dnf install wget tar perl -y

wget https://prdownloads.sourceforge.net/webadmin/webmin-2.105.tar.gz

Install the downloaded tar.gz source file using the command,

tar xvf webmin-2.105.tar.gz

Next, Create a new directory for Webmin

mkdir -p /usr/local/webmin

After creating now run the install and press with y script with the command:

webmin-2.105/setup.sh /usr/local/webmin/

Output:

[root@vps ~]# webmin-2.105/setup.sh /usr/local/webmin/
****************************************************************************
           Welcome to the Webmin setup script, version 2.105
****************************************************************************
Webmin is a web-based interface that allows Unix-like operating
systems and common Unix services to be easily administered.

Installing Webmin from /root/webmin-2.105 to /usr/local/webmin/

****************************************************************************
Webmin uses separate directories for configuration files and log files.
Unless you want to run multiple versions of Webmin at the same time
you can just accept the defaults.

Config file directory [/etc/webmin]: 
Log file directory [/var/webmin]: 

****************************************************************************
Webmin is written entirely in Perl. Please enter the full path to the
Perl 5 interpreter on your system.

Full path to perl (default /usr/bin/perl): 

Testing Perl ..
.. done

****************************************************************************
Operating system name:    Rocky Linux
Operating system version: 8.10

****************************************************************************
Webmin uses its own password protected web server to provide access
to the administration programs. The setup script needs to know :
 - What port to run the web server on. There must not be another
   web server already using this port.
 - The login name required to access the web server.
 - The password required to access the web server.
 - If the web server should use SSL (if your system supports it).
 - Whether to start webmin at boot time.

Web server port (default 10000): 
Login name (default admin):      
Login password: 
Password again: 
Use SSL (y/n): y
Start Webmin at boot time (y/n): y

****************************************************************************
Copying files to /usr/local/webmin/ ..
.. done

Creating web server config files ..
.. done

Creating access control file ..
.. done

Inserting path to perl into scripts ..
.. done

Creating start and stop scripts ..
.. done

Copying config files ..
.. done

Configuring Webmin to start at boot time ..
.. done

Creating uninstall script /etc/webmin/uninstall.sh ..
.. done

Changing ownership and permissions ..
.. done

Running postinstall scripts ..
.. done

Enabling background status collection ..
.. done

Attempting to start Webmin web server ..
.. done

****************************************************************************
Webmin has been installed and started successfully.

Since Webmin was installed outside the package manager, ensure the
following recommended Perl modules and packages are present:
 Perl modules:
  - DateTime, DateTime::Locale, DateTime::TimeZone, Data::Dumper
  - Digest::MD5, Digest::SHA, Encode::Detect, File::Basename
  - File::Path, Net::SSLeay, Time::HiRes, Time::Local, Time::Piece
  - lib, open
 Packages:
  - openssl - Cryptography library with TLS implementation
  - shared-mime-info - Shared MIME information database
  - tar gzip unzip - File compression and packaging utilities

Use your web browser to go to the following URL and login
with the name and password you entered previously:

  https://vps.server.com:10000

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.

Access the Webmin Web Interface.

firewall-cmd --add-port=10000/tcp --permanent
firewall-cmd --reload

For Install start Webmin, you can use the following command:

dnf install -y webmin
service webmin start
ss -tulpn | grep 10000

To access Webmin, open the URL from your web browser: https://IP_address:10000

Note:

1. When logging in for the first time, you will see an 'invalid SSL' warning.
2. Simply click on the 'Advanced' tab and then 'Accept the risk and Continue'.

Login to the Webmin web interface using your root user and password.

Once you log in, you will be redirected to the Webmin dashboard.