Cassandra Installation on Ubuntu Steps

$ sudo apt-get upgrade

$ sudo apt autoremove

$ sudo apt-key adv --keyserver pool.sks-keyservers.net --recv-key A278B781FE4B2BDA

$ sudo apt-get update

// verify Python version
$ python -V
Python 2.7.15+



Installing Casandra:
-----------------------
$ echo "deb http://www.apache.org/dist/cassandra/debian 311x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list
deb http://www.apache.org/dist/cassandra/debian 311x main

$ curl https://www.apache.org/dist/cassandra/KEYS | sudo apt-key add -

$ sudo apt-get update

$ sudo apt-get install cassandra

//start cassandra server
$ sudo service cassandra start

$ sudo update-rc.d cassandra defaults

hadoop@hadoop:/usr/local$ nodetool status
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address    Load       Tokens       Owns (effective)  Host ID                               Rack
UN  127.0.0.1  103.67 KiB  256          100.0%            a8c39288-3d56-4768-ba56-9910e9ce02e2  rack1

//start CLI for Cassandra
$ cqlsh localhost
Connected to Test Cluster at localhost:9042.
[cqlsh 5.0.1 | Cassandra 3.11.4 | CQL spec 3.4.4 | Native protocol v4]
Use HELP for help.