What is docker update and docker wait? Explain with example commands.
update : Update configuration of one or more containers
docker update f4d703072499
Wait : wait Block until one or more containers stop, then print their exit codes
docker wait f4d703072499
|Can be overridden||Cannot be overridden|
|Cannot append additional params||Can be appended|
|Command to run when container starts or arg to ENTRYPOINT if specified||Always first command to run when container starts|
|Multiple times can be added in the dockerfile but the last line will override the previous||Same behavior as CMD|
|Treated as additional param when it is used along with ENTRYPOINT||Always the main command|
what is tempfs in docker volume and how it use it?
If you’re running Docker on Linux, you have a third option: tmpfs mounts. … When you create a container with a tmpfs mount, the container can create files outside the container’s writable layer. As opposed to volumes and bind mounts, a tmpfs mount is temporary, and only persisted in the host memory.