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Install iTerm2 from https://www.iterm2.com/
Install oh-my-zsh from https://ohmyz.sh/ or https://github.com/robbyrussell/oh-my-zsh
Set iTerm2 theme tab theme to Dark - Preferences | Appearance | Tabs | Theme > Dark
Install Fira Code fonts from https://github.com/tonsky/FiraCode (Clone and navigate to dstr > ttf, install all font files by double clicking)
Install Powerline fonts from https://github.com/powerline/fonts
Set fonts for iTerm2 - Preferences | Profiles | Text
- Change Font to 14pt Fira code regular and Check Use Ligatures checkbox
- Change Non ASCII Font to 14pt Fira mono and Check Use Ligatures checkbox
Install iTerm2 snazzy theme from https://github.com/sindresorhus/iterm2-snazzy
- Navigate to Preferences | Profiles | Color Presets > Snazzy

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096

	# Check the alias
	keytool -list -keystore ${MYKEY}.jks

	# Export to PKCS12
	keytool -importkeystore -srckeystore ${MYKEY}.jks -destkeystore ${MYKEY}.pkcs -srcstoretype JKS -deststoretype PKCS12 -alias ${MYALIAS}

	# Convert to PEM
	openssl pkcs12 -in ${MYKEY}.pkcs -out ${MYKEY}.pem

	[root@kafka-a-01 /]# /opt/kafka_current/bin/kafka-console-consumer.sh
	The console consumer is a tool that reads data from Kafka and outputs it to standard output.
	Option Description
	------ -----------
	--blacklist <blacklist> Blacklist of topics to exclude from
	consumption.
	--bootstrap-server <server to connect REQUIRED (unless old consumer is
	to> used): The server to connect to.
	--consumer-property <consumer_prop> A mechanism to pass user-defined
	properties in the form key=value to

	import org.apache.spark.sql.SparkSession
	import org.apache.spark.SparkContext
	import org.apache.spark.SparkConf
	import org.apache.spark.sql.SQLContext
	import org.apache.spark.sql.types.{StructType,ArrayType}
	import org.apache.spark.sql.DataFrame
	import org.apache.spark.sql.Column
	import org.apache.spark.sql.functions.col
	import org.apache.spark.sql.functions.explode_outer

	ssh-keygen -t rsa -b 4096 -N '' -C "[email protected]" -f ~/.ssh/id_rsa
	ssh-keygen -t rsa -b 4096 -N '' -C "[email protected]" -f ~/.ssh/github_rsa
	ssh-keygen -t rsa -b 4096 -N '' -C "[email protected]" -f ~/.ssh/mozilla_rsa