GNU/Linux RHEL Adding PostgreSQL Repository
How to Add PostgreSQL.x Repository for Red Hat Enterprise based GNU/Linux Based Systems.
And the RHEL PostgreSQL Repository at this time is Valid for EL 6+.
So this Guide is valid for all the RHEL Based Distros like:
- CentOS
- Oracle Enterprise Linux
- Red Hat Enterprise Linux
- Rocky Linux
- AlmaLinux
 
- 1. Accessing Shell- Open a Shell Session 
 (Press “Enter” to Execute Commands)In case first see: Terminal QuickStart Guide.  
- 2. Downloading PostgreSQL Repo- Download PostgreSQL Enterprise Linux Repository Choose the EL Version and then Grab the Latest Available Release.
 Possibly, on Firefox Prompt Choose “Save File”:  
- 3. Installing PostgreSQL Repo- Then to Install PostgreSQL Enterprise Linux Repo 
 Simply play:- sudo dnf install ~/Downloads/pgdg-redhat*.rpm Or:- sudo yum install ~/Downloads/pgdg-redhat*.rpm Authenticate with the User Admin Pass.
 If Got “User is Not in Sudoers file” then see: How to Enable sudo.
 But if you are in Trouble to Find the Location on Terminal then See: How to Access Downloads Folder from Browser.
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