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
| CMD | ENTRYPOINT |
| 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.