Install ThingsBoard CE on Ubuntu Server
Precondition

Step 1. Install Java 8 (OpenJDK)

The ThingsBoard service runs on Java 8. Follow this instructions to install OpenJDK 8:

sudo apt update
sudo apt install openjdk-8-jdk

Don't forget to configure the operating system to use OpenJDK 8 by default. You can configure the default version using the following commands:

sudo update-alternatives --config java

You can check the installation with the following commands:

java -version

The expected command output is:

openjdk version "1.8.0_xxx"
OpenJDK Runtime Environment (...)
OpenJDK 64-Bit Server VM (build ...)

Step 2. ThingsBoard Service Installation

Download the installation package.

wget https://github.com/thingsboard/thingsboard/releases/download/v2.4.1/thingsboard-2.4.1.deb

Install ThingsBoard as a service

sudo dpkg -i thingsboard-2.4.1.deb

Step 3. Configure the ThingsBoard database

PostgreSQL installation
The instructions listed below will help you install PostgreSQL.

sudo apt-get update
sudo apt-get install postgresql postgresql-contrib
sudo service postgresql start

After installing PostgreSQL, you may need to create a new user or set a password for the primary user. The following instructions will help set the password for the primary PostgreSQL user

sudo su - postgres
psql
\password
\q

Then press "Ctrl + D" to return to the main user console and connect to the database to create thingboard DB:

psql -U postgres -d postgres -h 127.0.0.1 -W
CREATE DATABASE thingsboard;
\q

ThingsBoard configuration
Edit ThingsBoard configuration file

sudo nano /etc/thingsboard/conf/thingsboard.conf

Add the following to the configuration file. Don't forget to replace "PUT_YOUR_POSTGRESQL_PASSWORD_HERE" with your real postgres user password:

#DB Configuration
export DATABASE_ENTITIES_TYPE=sql
export DATABASE_TS_TYPE=sql
export SPRING_JPA_DATABASE_PLATFORM=org.hibernate.dialect.PostgreSQLDialect
export SPRING_DRIVER_CLASS_NAME=org.postgresql.Driver
export SPRING_DATASOURCE_URL=jdbc:postgresql://localhost:5432/thingsboard
export SPRING_DATASOURCE_USERNAME=postgres
export SPRING_DATASOURCE_PASSWORD=PUT_YOUR_POSTGRESQL_PASSWORD_HERE

Step 4. [Optional] Memory Update for Slow Computers (1GB RAM)

Edit ThingsBoard configuration file

sudo nano /etc/thingsboard/conf/thingsboard.conf

Add the following to the configuration file.

export JAVA_OPTS="$JAVA_OPTS -Xms256M -Xmx256M"

Step 5. Run the installation script

After installing the ThingsBoard service and updating the database configuration, you can execute the following scripts:

sudo /usr/share/thingsboard/bin/install/install.sh --loadDemo

Step 6. Start the ThingsBoard service

Execute the following command to start ThingsBoard:

sudo service thingsboard start

After startup, you will be able to open the Web UI with the following links:

http://localhost:8080/

If - loadDemo is specified during the execution of the installation script, the following default credentials can be used:

Sysadmin@thingsboard.org/sysadmin
Tenant Administrator: tenant@thingsboard.org/tenant
Customer User: customer@thingsboard.org/customer
You can always change the password of each account in the account profile page