ISPConfig is an Open-source Hosting Control Panel for Linux. It is used widely as it is free of cost. Please refer to the following article to install ISPConfig on Debian 10.

1. First of all, login to your Debian machine with root access using SSH.
   
   
2. Download the Debian installation file and extract it. 
   
   

   wget --no-check-certificate -O installer.tgz https://github.com/servisys/ispconfig_setup/tarball/master && tar zxvf installer.tgz

3. Let us now open and install the installer file. 
   
   

   cd *ispconfig* && bash install.sh

4. Once you run the installer, it will ask you to provide your fully qualified domain name. Make sure you provide the FQDN or the installer will give you an error. 
   
   
   
   
5. Setup server quota to default. 
   
   
6. Setup user quota to default.
   
   
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7. Select default in the unattended setup of expert mode for ISPConfig.
   
   
   
   
8. Install jailkit. 
   
   
   
   
9. Select Roundcube as your webmail client.
   
   
   
   
10. Select your country code for the SSL Certificate. Here, we have selected the US for United Status. You can choose your own. 
    
    
    
    
11. Provide the province and locality.
    
    
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12. Provide the Organization name and Company name. 
    
    
    
    
13. Once you are done with all the information, it will move further for the installation in the SSH.
    
    
14. It will install Web-server, Postfix, Clamwin, BIND, etc. in the installation process. Once the installation is completed, you will find the below screen. 
    
    
    
    
15. Login to your ISPConfig controlpanel using https://IPAddress:8080 with username: admin and password: admin
    
    
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16. Click on advance and proceed.
    
    
    
    
17. Login to your ISP Config.
    
    
    
    
18. You will get below screen once you are done with logging in.