What does . mean in docker? Does it mean the current working directory of the image or the local machine?

Question

I am confused about whether . means that it\'s a shortened abbreviation of the current directory of the image or if it\'s the current working directory on the l

Answer 1

I saw 3 . characters on your question, so let me expand one by one.

The first, as you imagine, the . character means the current directory.

In your Dockerfile

COPY . .

The second dot represented the current location on your virtual machine. Whenever you run cd command in the Dockerfile. That may be easy to understand.

The first dot more unintelligible a little. The first dot character represented the current location on your host machine. The location you input after docker build command like that:"docker build [options] ".

Docker build command

The dot character means the current directory whenever you call your docker build command. For example:

[~]$ docker build .

The dot character represented for default home directory of this user on your real machine.