Kubernetes Day 3: Understanding File Permissions and Bind Mounts in Docker

File permissions in Linux can be managed using chmod, while the umask command sets default permissions — for example, a umask of 0002 results in 664 permissions for files. Bind mounts in Docker link a host directory to a container directory, functioning as a volume for persistent data sharing. The docker run -v flag is used to map a local folder to a path inside the container, such as ./data to /home/data. Docker images are read-only and cannot be modified in place; any changes result in the creation of a new image layer. A container is essentially a running instance of a Docker image, spun up through the Docker engine.