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PostgreSQL is a powerful, open-source object-relational database system that is known for its reliability, flexibility, and scalability. It provides advanced features like full-text search, geospatial support, and extensibility through its extension framework. In this guide, we will walk you through the installation process of PostgreSQL on Ubuntu 18.04.
Before installing any software, it's important to update the system packages to their latest versions. Open a terminal and run the following command:
sudo apt update
Once the system packages are updated, you can proceed with the installation of PostgreSQL. Run the following command in the terminal:
sudo apt install postgresql
After the installation is complete, you can verify it by checking the version of PostgreSQL. Run the following command:
psql --version
By default, PostgreSQL creates a system user named "postgres" during the installation. You can switch to the "postgres" user and access the PostgreSQL shell using the following command:
sudo su - postgres
You can now use commands like "psql" to interact with the PostgreSQL database.
To create a new user and database in PostgreSQL, you can follow these steps:
sudo su - postgres
psql
CREATE USER myuser WITH PASSWORD 'mypassword';
CREATE DATABASE mydatabase OWNER myuser;
GRANT ALL PRIVILEGES ON DATABASE mydatabase TO myuser;
\q
To start, stop, or restart the PostgreSQL service on Ubuntu, you can use the following commands:
sudo service postgresql start
sudo service postgresql stop
sudo service postgresql restart
Congratulations! You have successfully installed PostgreSQL on Ubuntu 18.04. You can now use PostgreSQL to build and manage powerful databases for your applications.
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