What does the -w parameter in docker run do?

The -w parameter in the docker run command is used to set the working directory inside the container. This is the directory where the command specified in the container will be executed.

The syntax for using the -w parameter is:

docker run -w <working_directory> <image_name> <command>

• <working_directory>: The path to the directory inside the container where you want to set the working directory.
• <image_name>: The name of the Docker image you are running.
• <command>: The command you want to execute inside the container.

For example:

docker run -w /app -it ubuntu /bin/bash

In this command, the working directory inside the container is set to /app, and when the /bin/bash command is executed, it will start in that directory. If the specified working directory does not exist, Docker will create it automatically.