update redis on ubuntu 18.04 code example

Example 1: how to install redis in ubuntu

sudo apt update
sudo apt install redis-server

sudo nano /etc/redis/redis.conf

# change "supervised no" to "supervised systemd" 
supervised systemd

sudo systemctl restart redis.service

sudo systemctl status redis

redis-cli

Example 2: install redis ubuntu

sudo apt update
sudo apt install redis-server

sudo systemctl restart redis.service

sudo systemctl status redis

redis-cli