PostgreSQL is a popular open-source relational database management system. Here are the steps to install PostgreSQL on AlmaLinux:
1. Update the package index:
```sudo dnf update
```
2. Install the PostgreSQL server and client packages:
```sudo dnf install postgresql-server postgresql-contrib postgresql
```
3. Initialize the database:
```sudo postgresql-setup --initdb
```
4. Start the PostgreSQL service and enable it to start automatically on boot:
```sudo systemctl start postgresqlsudo systemctl enable postgresql
```
5. Configure the PostgreSQL user and password:
By default, PostgreSQL creates a system user named "Postgres" with no password. To set a password for this user, use the following command:
```
sudo passwd postgres
```
6. Configure PostgreSQL to listen on all network interfaces:
```sudo nano /var/lib/pgsql/data/pg_hba.conf
```
Find the following line:
```# IPv4 local connections:host all all 127.0.0.1/32 ident
```
Add the following line after it:
```host all all 0.0.0.0/0 md5
```
Save the file and exit the text editor.
7. Restart the PostgreSQL service:
```sudo systemctl restart postgresql
```
You have successfully installed PostgreSQL on AlmaLinux. To create and manage PostgreSQL databases, you can use the "psql" command-line tool or a graphical client such as pgAdmin.
