mosquitto password documentation off

[the1gofer]

the wiki says

To create a username and password, use the following as a template.

$ docker exec mosquitto mosquitto_passwd -b /mosquitto/pwfile/pwfile «username» «password»
Replace «username» and «password» with appropriate values, then execute the command.

when you use that command with the current image, you get

-bash: $: command not found

From what I gather whatever image that's based off doens't have bash. If you do
docker exec -it sh. then
mosquitto mosquitto_passwd -b /mosquitto/pwfile/pwfile «username» «password»
it seems to work.

[Paraphraser]

I suspect a typo. The Mosquitto image has both ash and sh (as symlinks to busybox) but that really only matters if you need shell services.

In words:

1. Show the version of Mosquitto running inside the container (2.0.14).
2. Go into the external directory holding the password file.
3. Show the password file is empty.
4. Add a password (note that no -it and no sh is needed).
5. Show the password made it into the password file.
6. Delete the password using the same approach as step 4.
7. Show the password file is empty again.

If you can't replicate then there must be some explanation other than the mosquitto_password not being there because that command is still in my instance and I didn't do anything special.

Also, once you are running in an interactive shell inside the container, mosquitto mosquitto_password will invoke "mosquitto" and pass it "mosquitto_password" etc as arguments. When I try that I get "Error: Unknown option 'mosquitto_passwd'." so, to me, that means mosquitto (the command) is unable to invoke mosquitto_passwd (another command).

I wonder if you're misunderstanding the command syntax. It's:

$ docker exec container command arguments

so, in something like:

$ docker exec mosquitto mosquitto -h

the first "mosquitto" is the container, the second "mosquitto" is the command to run inside the container, and "-h" is an argument to pass to that command running inside the container.

Make sense?

[the1gofer]

anything is possible, but I thought I was copy pasting. I went back and tried to add another one, and it worked. So I don't know. Thanks for your detailed response.

[Paraphraser]

You're welcome. I did something similar the other day. The commands were still in my history file and they looked perfectly OK but, somehow, there was this problem in the space between the keyboard and the chair... 🤦‍♂️