root $ 
root $ docker images
REPOSITORY           TAG                 IMAGE ID            CREATED             SIZE
redislabs/redis      latest              59018075aa2a        11 days ago         1.2GB
redis                latest              84c5f6e03bf0        2 weeks ago         104MB
mysql/mysql-server   latest              8a3a24ad33be        2 months ago        366MB
root $ 
root $ docker inspect redis | grep URL
                "REDIS_DOWNLOAD_URL=http://download.redis.io/releases/redis-6.0.8.tar.gz",
                "REDIS_DOWNLOAD_URL=http://download.redis.io/releases/redis-6.0.8.tar.gz",
root $ 
root $ docker inspect redislabs/redis | grep URL
root $