Install Pulsar 242
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sudo mkdir Pulsar-2.4.2
cd Pulsar-2.4.2
wget https://archive.apache.org/dist/pulsar/pulsar-2.4.2/apache-pulsar-2.4.2-bin.tar.gz
tar xvfz apache-pulsar-2.4.2-bin.tar.gz

------install java 8 dependency
sudo apt install openjdk-8-jre-headless
add this line, minding the file path --> $JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64"

find /usr/lib/jvm/java-8-openjdk-amd64 exists or not
vim /etc/profile
add-
export JAVA_HOME="/usr/lib/jvm/java-8-openjdk-amd64"
echo %JAVA_HOME to test

------install python
sudo apt-get install python
sudo apt-get install monit

------------customize 'ubuntu' to the user name
sudo cp /home/ubuntu/Services/pulsarSQL.service /lib/systemd/system/ && sudo cp /home/ubuntu/Services/pulsarSQL.sh /lib/systemd/system/ && sudo chmod 644 /lib/systemd/system/pulsarSQL.service && sudo systemctl daemon-reload && sudo systemctl enable pulsarSQL.service && sudo systemctl start pulsarSQL.service && sudo cp /home/ubuntu/Services/pulsarSQLMonit /etc/monit/conf.d/ && sudo monit reload

--------------if v2 is used, please rename it to pulsarServer
sudo mv /home/ubuntu/Services/pulsarServerV2.sh /home/ubuntu/Services/pulsarServer.sh 

sudo cp /home/ubuntu/Services/pulsarServer.service /lib/systemd/system/ && sudo cp /home/ubuntu/Services/pulsarServer.sh /lib/systemd/system/ && sudo chmod 644 /lib/systemd/system/pulsarServer.service && sudo systemctl daemon-reload && sudo systemctl enable pulsarServer.service && sudo systemctl start pulsarServer.service && sudo cp /home/ubuntu/Services/pulsarServerMonit /etc/monit/conf.d/ && sudo monit reload

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Install Service
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There's dummy service files in the Services directory

1. RUN COMMAND -- sudo (mv or cp) xxx.service /lib/systemd/system/
2. RUN COMMAND -- sudo chmod 644 /lib/systemd/system/xxx.service
4. RUN COMMAND if it has to START AT BOOT-- sudo systemctl enable xxx.service
3. RUN COMMAND -- sudo daemon-reload && sudo monit reload
5. RUN COMMAND -- sudo systemctl (start, stop, restart, status) xxx

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Please note if you've made any changes to the .sh file, or to Monit or to anything in general, daemon-reload/monit reload it then restart specific services
Otherwise it'll just use the previous instance ¯\_(ツ)_/¯