Help
$ docker --help
$ docker image --help
$ docker image ls --help
Versions
See the Docker version
$ docker --version
Help
$ docker --help
$ docker image --help
$ docker image ls --help
Versions
See the Docker version
$ docker --version
List
List current directory's directories
ls -ld *
List current directory's directories and their files:
ls -l *
List current directory's contents recursively:
ls -lR
List specified directory's contents:
ls dir123 -ltr
CONCEPTS
Take a clone of a remote repository and run git branch -a (to show all the branches git knows about). It will probably look something like this:
* master
remotes/origin/HEAD -> origin/master
remotes/origin/master
Here, master is a branch in the local repository. remotes/origin/master is a branch named master on the remote named origin. You can refer to this as either origin/master, as in:
git diff origin/master..master
You can also refer to it as remotes/origin/master:
git diff remotes/origin/master..master
What is Kubernetes
* Kubernetes is an open-source container orchestrator
* K8s helps with:
* Cluster Management of machines (perform health checks, bounce them, change cluster size)
* Scheduling containers on those machines (match CPU/memory requirements with right machines).
* Defines API objects to describe your cluster’s desired state.
* Provides basic monitoring, logging, and health checking.
* Reconciles desired state and current state.
DDD
Message types:
Vert.x is a toolkit to build reactive and distributed systems.
It's a server API for writing asynchronous networking applications (e.g. for db connectivity, monitoring, authentication, service discovery, clustering, etc.)
You can use Vert.x callback-based API exclusively, but Vert.x also implements an equivalent Rxified API using RxJava under the hood. This provides a great platform to integrate Vert.x modules within RxJava applications.
Vert.x provides fluent HTTP endpoints and route configuration backed by handlers where the business logic is implemented. But the real nervous system is the event bus that acts as a telecom provider to all Vert.x local or distributed components.
Its event-bus supports:
Ceiling Fan: Connect the tip of the ceiling COPPER wire with the tip of the GREEN ground wires (one from the fan, and another one from the fan base).
Connect all WHITE neutral wires (ceiling, receiver and fan).
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