How to Install PostgreSQL in Rocky Linux 9

PostgreSQL is a powerful, open-source object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.

Update the system

First, we will update the system to the latest with the following commands,

dnf update

Install PostgreSQL Repository

Add the official PostgreSQL Repository for the Rocky Linux system by running the below command,

dnf install -y

Install the PostgreSQL Server

At the time of writing this article, version 14.4 is the latest version available from PostgreSQL, we will manually select this version for installation in our case.

Check PostgreSQL official website to find out the latest version available at the time of installation.

Install the latest version of PostgreSQL with the below command,

dnf install -y postgresql14-server


[root@vps ~]# dnf install -y postgresql14-server
Last metadata expiration check: 0:00:36 ago on Thu 28 Jul 2022 04:52:12 PM UTC.
Dependencies resolved.
 Package                              Architecture            Version                              Repository               Size
 postgresql14-server                  x86_64                  14.4-1PGDG.rhel9                     pgdg14                  5.8 M
Installing dependencies:
 libicu                               x86_64                  67.1-9.el9                           baseos                  9.6 M
 lz4                                  x86_64                  1.9.3-5.el9                          baseos                   58 k
 postgresql14                         x86_64                  14.4-1PGDG.rhel9                     pgdg14                  1.4 M
 postgresql14-libs                    x86_64                  14.4-1PGDG.rhel9                     pgdg14                  281 k

Transaction Summary
Install  5 Packages

Creating a New PostgreSQL Database Cluster

Initialize a database storage area on disk by using the following command:

/usr/pgsql-14/bin/postgresql-14-setup initdb


[root@vps ~]# /usr/pgsql-14/bin/postgresql-14-setup initdb
Initializing database ... OK

Start the PostgreSQL service:

systemctl start postgresql-14

Enable the PostgreSQL service:

systemctl enable postgresql-14

Verify the PostgreSQL service:

systemctl status postgresql-14


[root@vps ~]# systemctl status postgresql-14
● postgresql-14.service - PostgreSQL 14 database server
     Loaded: loaded (/usr/lib/systemd/system/postgresql-14.service; enabled; vendor preset: disabled)
     Active: active (running) since Thu 2022-07-28 16:53:54 UTC; 11s ago
    Process: 28389 ExecStartPre=/usr/pgsql-14/bin/postgresql-14-check-db-dir ${PGDATA} (code=exited, status=0/SUCCESS)
   Main PID: 28394 (postmaster)
      Tasks: 8 (limit: 11129)
     Memory: 16.4M
        CPU: 75ms
     CGroup: /system.slice/postgresql-14.service
             ├─28394 /usr/pgsql-14/bin/postmaster -D /var/lib/pgsql/14/data/
             ├─28395 "postgres: logger "
             ├─28397 "postgres: checkpointer "
             ├─28398 "postgres: background writer "
             ├─28399 "postgres: walwriter "
             ├─28400 "postgres: autovacuum launcher "
             ├─28401 "postgres: stats collector "
             └─28402 "postgres: logical replication launcher "

PostgreSQL Roles

We'll switch to a postgres account for this.

sudo -i -u postgres

you can access a PostgreSQL prompt using the psql utility.



[root@vps ~]# sudo -i -u postgres
[postgres@vps ~]$ psql
psql (14.6)
Type "help" for help.

To exit out of the PostgreSQL shell type.


To create PostgreSQL Role:

createuser --interactive


[postgres@vps ~]$ createuser --interactive
Enter name of role to add: Adam
Shall the new role be a superuser? (y/n) y

PostgreSQL Database

Create a Database by using the following command:

createdb db_name

Enter the Database name

[postgres@vps ~]$ createdb my_db

Opening a Postgres Prompt with the New Role

We will add a new user for managing the roles accordingly. For this, switch back to the root user account by exiting the current user mode with the following command:


Then, run the adduser command to add the new user on the system.

adduser username


    [root@vps ~]# adduser Adam

Now, switch over to the newly added user and enter into the Database.

sudo -i -u username

psql -d database_name


   [root@vps ~]# sudo -i -u Adam
   [Adam@vps ~]$ psql -d my_db
   psql (14.6)
   Type "help" for help.

Once you logged in as jones and check your current connection information.



my_db=# \conninfo
You are connected to database "my_db" as user "Adam" via socket in "/var/run/postgresql" at port "5432".

This concludes the topic on installing PostgreSQL on Rocky Linux.