Commands to add Docker’s official GPG key do not work when copy/pasted.

[zachmorr]

File: engine/install/ubuntu.md

When commands in step 2 of "Install using the repository" are copy/pasted the docker.gpg file isn't downloaded. This causes a GPG error on the next step.

Here is the terminal output:

zach@DESKTOP-B1UUGUV:~/projects/npi$ sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpgcurl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpgzach@DESKTOP-B1UUGUV:~/projects/npi$ ll
total 8
drwxr-xr-x 2 zach zach 4096 Jan  2 10:38 ./
drwxr-xr-x 4 zach zach 4096 Jan  2 10:38 ../
zach@DESKTOP-B1UUGUV:~/projects/npi$

Notice the lack of newline after the second command, maybe that's related to whatever is causing the issue?

I am on Windows, using WSL, and this problem occurs in powershell, cmd, and ubuntu.exe but NOT Windows Terminal.

Copy/pasting each of the two commands individually fixed the problem for me.

[OneCricketeer]

I think the problem is that piping into sudo sometimes doesn't work on first time.

this problem occurs in powershell, cmd, and ubuntu.exe but NOT Windows Terminal

Windows Terminal (powershell/cmd) don't use sudo...?

[zachmorr]

Sorry, I forgot to mention, I was opening wsl through those four apps before attempting the command.

[OneCricketeer]

Did the dollar sign accidentally get copied in your command? The commands are indeed meant to be ran separately. Typed, or copied one at a time

[zachmorr]

I don't think so, I don't see an extra dollar sign in the terminal output. It seems like the second command isn't being executed

[OneCricketeer]

Something got messed up when you pasted. Notice that curl got put twice on the same line, so there is likely an error hidden behind the sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpgcurl -fsSL ... since -fsSL aren't all valid gpg flags, then that error is piped into the next | sudo gpg section

Plus, nothing is downloaded to the current folder, so I'm not sure what ll is supposed to show for this issue

[zachmorr]

Nice catch, I didn't see that curl was in there twice. For some reason the second command is being pasted twice. I played around with it some more, it appears to be related to WSL specifically. Here is the output I just tested in cmd.exe

Microsoft Windows [Version 10.0.19045.2364]
(c) Microsoft Corporation. All rights reserved.

C:\Users\Zach>sudo mkdir -p /etc/apt/keyringscurl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
'sudo' is not recognized as an internal or external command,
operable program or batch file.

C:\Users\Zach>wsl
zach@DESKTOP-B1UUGUV:/mnt/c/Users/Zach$ sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpgcurl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpgzach@DESKTOP-B1UUGUV:/mnt/c/Users/Zach$ ll /etc/apt/keyrings/
total 8
drwxr-xr-x 2 root root 4096 Jan  3 11:38 ./
drwxr-xr-x 8 root root 4096 Oct 25 14:36 ../
zach@DESKTOP-B1UUGUV:/mnt/c/Users/Zach$

The first attempt is pasted correctly and we see the expected 'sudo' is not recognized error, but once WSL is started the problem appears. I only copied the commands once, before opening cmd.exe, so the problem isn't caused by a bad copy.

It's looking like this is a problem with WSL, not the docker docs. No idea what could be causing it though. I'd be interested if this can be replicated on another machine.

Also, in the op I meant to do ll /etc/apt/keyrights/ not ll to show that the file wasn't there, my mistake.

[OneCricketeer]

Interesting.

In any case, you should not be following those docs at all for WSL. You can install Docker for Windows, then in the Settings of Docker Desktop, you can enable WSL2 integration for your Ubuntu distro, which will install the docker CLI within it.

[zachmorr]

In any case, you should not be following those docs at all for WSL

I was able to get it working on WSL2 using the Ubuntu docs + an extra sudo service docker start at the end, but that isn't the first time I've seen someone mention that. I'll probably convert over to Docker for Windows eventually

[OneCricketeer]

The service should ideally be managed as a Windows process, rather than a Unix one. There shouldn't be anything to "convert" since your built/pulled images would all work the same.

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