How to Install PostgreSQL in CentOS 7
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Summary: Learn how to install PostgreSQL on CentOS 7 with step-by-step instructions. PostgreSQL, an open-source relational database management system, is widely used for various applications. Follow this guide to set it up on your CentOS 7 system.
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PostgreSQL is a powerful open-source relational database management system used by many organizations worldwide. If you’re running CentOS 7 and need to install PostgreSQL, here’s a step-by-step guide to help you through the process:
Step 1: Update Your System
Before installing any new software, it’s a good idea to update your system to ensure you have the latest packages and security patches. You can do this by running the following commands:
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Step 2: Enable PostgreSQL Repository
PostgreSQL isn’t included in the default CentOS repositories, so you’ll need to enable the PostgreSQL repository. This can be done by installing the yum-utils package and then adding the PostgreSQL repository:
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Step 3: Install PostgreSQL
Once you’ve enabled the PostgreSQL repository, you can proceed to install PostgreSQL using the following command:
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Replace postgresql13 with the version you want to install, e.g., postgresql12 or postgresql11.
Step 4: Initialize the Database
After the installation is complete, you need to initialize the PostgreSQL database. You can do this by running the following command:
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Again, replace 13 with the version you installed.
Step 5: Start and Enable PostgreSQL Service
Now that PostgreSQL is installed and the database is initialized, you can start the PostgreSQL service and enable it to start on boot by running the following commands:
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Step 6: Set PostgreSQL Password
By default, PostgreSQL is configured to use ‘ident’ authentication, which means it trusts the operating system user to log in. To set a password for the default ‘postgres’ user, switch to the ‘postgres’ user and access the PostgreSQL prompt:
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Then, set the password for the ‘postgres’ user:
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Enter and confirm the new password when prompted.
That’s it! PostgreSQL is now installed and running on your CentOS 7 system. You can now start creating databases and managing your data with PostgreSQL.
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