I was using the Original image+GP4.2, then I moved to the Merlin image, but after a while I noticed that there was something different in the sharpness and colors of the picture on the screen, so I wanted to make sure that the Enigma was updated to the latest official update on 29-10-2021, so I replaced Merlin feed with the Original feed and searched to see if there were updates available or not. I found that there are over 400 updates available! It seems that Merlin image is not updated to the latest official Enigma. So I went back to the Original image as the picture quality and colors on the screen are better.
I apologize for this. I thought the question was in general and not related to dm920.
This was done on a DM520. I replaced the Merlin feed with the original feed and wrote these commands via telnet:
Then I searched for updates and found that Merlin image does not have the latest official updates 29-10-2021.
When I returned to the original image, I found that the image did not respond to the original feed!, I discovered that Dream Company had changed HTTP to HTTPS, so I downloaded three add-ons from original feed and installed them manually and restarted the device, not the enigma.
1- libcurl4_7.47.1-r0.5_mipsel.deb
2- apt-transport-https_1.0.10.1-r0.5_mipsel.deb
3- ca-certificates_20211017-r0.1_all.deb
And the original feed was connected again.