Issue with `docker pull interledgerrs/ilp-cli` command in tutorial

[LoisRP]

@kincaidoneil I had an error with the first docker command in the tutorial. I wonder if there is a permissions issue for me.

REM-ZN4L2L-M:ko-test lpatterson$ docker pull interledgerrs/ilp-cli
Using default tag: latest
Error response from daemon: dial unix docker.raw.sock: connect: connection refused

In contract, I have no problem with the second command.

REM-ZN4L2L-M:ko-test lpatterson$ docker pull interledgerrs/ilp-settlement-ethereum
Using default tag: latest
latest: Pulling from interledgerrs/ilp-settlement-ethereum
c9b1b535fdd9: Pull complete
e5798d4291ca: Pull complete
54e8f7f818a4: Pull complete
6c5e7c352108: Pull complete
Digest: sha256:c1b341d438743204a1a3fbfc835c8d3d77c9974dad50051ea348528293f3d3bf
Status: Downloaded newer image for interledgerrs/ilp-settlement-ethereum:latest
docker.io/interledgerrs/ilp-settlement-ethereum:latest

[LoisRP]

Follow-up: I ran docker pull interledgerrs/ilp-cli again (after successfully running the ethereum command), and this time it worked. Was there a momentary outage that prevented it before?