Find the host name and port using PSQL commands

📝 Tech Blog Post: Finding Host Name and Port Using PSQL Commands 🚀

Introduction: Hey there tech enthusiasts! Today, we are going to dive into the world of PostgreSQL and explore how to find the host name and port using PSQL commands. 🐘

Common Issues and a Specific Problem: Have you ever found yourself scratching your head, wondering how to connect your Perl application to a PostgreSQL database? Well, fret not! One of the first steps is to identify the host name and port on which your database is running. 🤔

Solution: Fortunately, PSQL provides us with a straightforward solution to this problem. 🙌 Let's take a look at the command:

psql -c "SELECT inet_server_addr() AS host, inet_server_port() AS port;" -d your_database_name

Explanation:

• psql: Launches the PSQL command-line interface.

• -c: Executes the specified command.

• "SELECT inet_server_addr() AS host, inet_server_port() AS port;": This PostgreSQL command retrieves the server address and port. We provide aliases "host" and "port" for easier understanding.

• -d your_database_name: Connects to the specified database. Replace "your_database_name" with the name of your PostgreSQL database.

Example: Let's say we have a Perl application, "my_perl_app," and our PostgreSQL database is named "my_postgres_db." In this case, the command would be:

psql -c "SELECT inet_server_addr() AS host, inet_server_port() AS port;" -d my_postgres_db

Output: After running the command, you should receive output similar to the following:

host     |  port   
---------------+---------
 192.168.1.100 | 5432

The "host" field shows the IP address or hostname where your database is running, and the "port" field indicates the port number being used.

Call-to-Action: There you have it, folks! Now that you know how to find the host name and port using PSQL commands, go ahead and try it out for yourself. 🚀 Connect your Perl application seamlessly with your PostgreSQL database!

Have any questions or suggestions? Feel free to drop them in the comments section below. Let's engage in a tech discussion together! 💬🤝

Happy coding! 😊✨