What is the purpose of the "i" flag when running the 'docker run' command?

What is the purpose of the "i" flag when running the 'docker run' command?

• A. To enable verbose logging
• B. To make the container interactive
• C. To detach the container from the terminal
• D. To allocate a pseudo-TTY

Answer: (B)

The i flag makes the container interactive by keeping the standard input open so you can send input to the processes running inside. This is what allows you to type commands into a shell inside the container when you attach to it. In practice, you often pair it with the -t flag to get a real terminal (for example, docker run -it ubuntu bash). Without this flag, a shell would not receive your keystrokes as input in an interactive session. The other options in the question relate to detaching from the terminal or allocating a pseudo-TTY, which are different behaviors.

The i flag makes the container interactive by keeping the standard input open so you can send input to the processes running inside. This is what allows you to type commands into a shell inside the container when you attach to it. In practice, you often pair it with the -t flag to get a real terminal (for example, docker run -it ubuntu bash). Without this flag, a shell would not receive your keystrokes as input in an interactive session. The other options in the question relate to detaching from the terminal or allocating a pseudo-TTY, which are different behaviors.