Exec and Attach
docker exec
Run a command in a running container:
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LearnStep 1 of 2
Exec and Attach
Learning Objectives
- •Execute commands in containers
- •Attach to container processes
- •Debug running containers
Lesson Outline
LearnStep 1/2
Exec and Attach
bash
docker attach
Attach to container's main process (PID 1):
bash
Difference: exec vs attach
| exec | attach |
|---|---|
| Creates new process | Connects to main process |
| Multiple sessions possible | Single session to PID 1 |
| Exit doesn't stop container | Exit may stop container |
| Use for debugging | Use for interactive apps |
Copying Files
bash