Commands for Relevant Tech Stacks

These are lists of commands that I commonly use for my personal projects as well as for work.

Docker

List the file parameters with their values on your docker-compose.yml file

docker-compose config

Delete all images:

docker rm -vf $(docker ps -a -q)
docker rmi $(docker images -a -q)

Delete containers:

docker rm -f $(docker ps -a -q)

Delete all volumes:

docker volume rm $(docker volume ls -q)
docker volume prune

Remove all unused containers, networks, images (both dangling and unreferenced), and optionally, volumes.

Docker system prune -a

All Docker commands in one. This is meant to be used to wipe all docker images, containers, and volumes across board. yes | * is used to force user acceptance. Use this only at a last resort as this is a very destructive command. Will delete everything even outside the scope of this directory.

docker rm -vf $(docker ps -a -q)
docker rm -f $(docker ps -a -q)
docker rmi $(docker images -a -q)
docker volume rm $(docker volume ls -q)
yes | docker volume prune
yes | docker system prune -a

Kubernetes

List all services

kubectl get svc

Retrieve all deployments

kubectl get deployments

Exposes the service externally so they can hit that point. -type from TYPE when listing all kubetcl services.

kubectl expose deployment httpbin —type=LoadBalancer —name=myhttpbin

Give information about which cluster you’re connecting to.

kubectl  cluster info

MongoDB

List all available databases

show dbs || show databases

Connect to the database

mongo "mongodb://Admin:${DBPASSWORD}@<host>:<port>/admin?authSource=admin"

Example of the above connection

mongo mongodb://root:rootpassword@localhost:27017/admin?authSource=admin

List the entries of a database

show <db_entry_name>

Start using into the database

use <database_name>

Create a user (on admin db)

db.createUser(
  {
    user: "kifarunixdemoAdmin",
    pwd: passwordPrompt(),
    roles: [ { role: "userAdminAnyDatabase", db: "admin" }, "readWriteAnyDatabase" ]
  }
)

Create Collection

db.createCollection(“<collection_name>”)

Index your collection for performance reasons

db.invoices.createIndex({<>:1})

Insert Documents

db.<collection_name>.insertMany([<json_parameter_value_pairs])

Search for documents

db.<collection_name>.find().pretty()