after update, I see container images twice ...

[pakair]

I updated containers with "docker pull containerID" but now "docker images" lists repositories twice (see below).

Q. How do I get rid of the old (4 weeks) and keep the latest? In general,
how do I keep my system up-to-date with changes fixed on the github repo?

Thanks, Paul

REPOSITORY                             TAG       IMAGE ID       CREATED          SIZE
prom/blackbox-exporter                 latest    c9e462ce1ee4   56 minutes ago   20.9MB
miguelndecarvalho/speedtest-exporter   latest    753d258c0c79   7 days ago       62.6MB
miguelndecarvalho/speedtest-exporter   <none>    d33228cf0959   4 weeks ago      62MB
grafana/grafana                        latest    13b20b4fe691   4 weeks ago      204MB
prom/prometheus                        latest    6d6859d1a42a   5 weeks ago      169MB
prom/prometheus                        v2.25.2   9ef343b5ed33   7 weeks ago      175MB
prom/node-exporter                     latest    c19ae228f069   2 months ago     26MB
prom/blackbox-exporter                 <none>    fd1563338c71   7 months ago     20.9MB

[geerlingguy]

The question of keeping things up to date is a little more complicated, so I'll hold off on that, but to clean up images that are no longer in use, you can use docker system prune --all, and it will remove any images or containers not currently running.

[geerlingguy]

See also: geerlingguy/internet-pi#7