detect docker image exists on remote without pull.
dockerimageexists -image ubuntu:18.04 # need auth dockerimageexists -image some_private:tag -username $user -password $pwd # output file (empty file currently) when found dockerimageexists -image some_private:tag -outfile $filename image: wangpeiwen/dockerimageexists settings: username: someone password: pwd image: ubuntu:18.04 outfile: outfile