[Amresh]

Before beginning I want to elaborate why I started this thread....
I installed ajenti and changed the port in-between  7801-7820 to access it but later on I wanted to uninstall it and install cyberpanel.
But as soon as I tried sudo apt-get remove ajenti it gave me a error that no package ajenti found.
I asked @chanalku91 as he also owns one nanokvm vps on how to change os.
He stated me some steps which I tried and it worked out well after I tried it twice.....
So, the whole credits to @chanalku91 for this
I am just going to elaborate it more
And yes thnx to @Neoon for giving us such a nice NanoKVM VPS

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Okay, So let's get started!

Step 1: As Usual first login to the NanoKVM panel

Step 2: Select the ISO which you want from the ISO Option on the panel


Step 3: Then restart the vps by clicking that Restart button

Step 4: Now click on the VNC button to open the VNC details.
            It get changed in few seconds so as soon as the VNC details page opens then connect to it by using your preferred VNC client.
            Here, I am gonna use RealVNC VNC Viewer.
            Now as soon as you get connected you will get a screen like this(If you haven't tried installing any iso then you will get something like                    this):


Step 5: Restarting the machine to select the BOOT from option. For this click on the ctrl + alt + del button


Step 6: As soon as you click that button the system will start restarting. Once you see this page immediately click Esc button.


Step 7: Now you will reach the Boot Menu if you performed all the above steps clearly!


Now select the 3rd option which contains the installation ISO file.

And Voila! The new OS Installation page will open up!

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FEEL FREE TO ASK Me(@Amresh), @chanalku91, @Neoon and Staff if you have any doubt
Contributions to threads are always welcomed!