Changing the IMAGE ID of a docker image?

General Discussions
1 
prusso@yoga:~$ sudo docker image ls
[sudo] password for prusso: 
REPOSITORY        TAG         IMAGE ID       CREATED        SIZE
dolfinx/dolfinx   v0.6.0-r1   71751c3cd13d   5 months ago   3.35GB
prusso@yoga:~$

Is there a way to change the IMAGE ID to a more friendly type of alpha numeric name or something like it?

What about backing up to a file by a tag name? Is such a thing possible? I see a command to use the image id which is a little bit tough to type out each time the code.

2

The image id is calculated from the content of the image, you can’t customize it, but you don’t need to. USe the tags instead. In your case it is:

dolfinx/dolfinx:v0.6.0-r1

So docker run would be something like this:

docker run --rm -it dolfinx/dolfinx:v0.6.0-r1 sh

That is just the syntax. It may not work with that image depending on the entrypoint and whether it has a shell or not.