I donot have any server with internet, installed docker through rpm packages. how do i download images/ image tarball to use in my server.
You need a server or any machine with internet, download the images, and save them with
docker save one or more tar file, copy the tar files to the offline server and load the images with
docker image load.
Or you could use aproxy server which has access to the internet and allow only domains and IP addresses related to Docker registries you use.