Use the API method:

/billing.php?do=apidoch#5



Once you need to ask support for unique key to access the API, don't give it to anyone!



EXAMPLE



To reinstall via a browser, follow this link:



/api/reinstall.php?userid=1111&apikey=22222222222&orderid=3333&os=ubuntu-20.04-standard_20.04-1_amd64



Where 1111 - your billing ID (you can find it on the top right by clicking on the spaceman icon)

Where 22222222222 - your unique API key (you can view and change it in the settings)

Where 3333 - the number of your order on which the OS needs to be reinstalled.

Where ubuntu-20.04-standard_20.04-1_amd64 - the name of the distribution.



Replace the data in the link with your own.



List of available operating systems:



alpine-3.13-default_20210419_amd64

centos-6-default_20191016_amd64

centos-7-default_20190926_amd64

centos-8-default_20201210_amd64

debian-10-standard_10.7-1_amd64

debian-8.0-standard_8.11-1_amd64

debian-9.0-standard_9.7-1_amd64

fedora-33-default_20201115_amd64

ubuntu-16.04-standard_16.04.5-1_amd64

ubuntu-18.04-standard_18.04.1-1_amd64

ubuntu-20.04-standard_20.04-1_amd64

ubuntu-21.04-standard_21.04-1_amd64





WARNING



After reinstallation you will have a completely clean OS and need to install the correct DNS and allow SSH login.



- Allow login via SSH:

Login to the Proxmox control panel (login details can be found in the ordering information)

Open the file `/etc/ssh/sshd_config`.

You can use the editor nano or vim.



nano /etc/ssh/sshd_config

vi /etc/ssh/sshd_config



Find the following line (or similar) there.



#PermitRootLogin prohibit-password





It should be reduced to the following form:



PermitRootLogin yes



Next, restart the SSH server with the following command:



service sshd restart # For CentOS/Fedora

service ssh restart # For Ubuntu/Debian



or restart the server.



How to solve the DNS problem is described here:

/billing.php?do=faq&group=9&fgroup=0&item=53