Question: What is the default port used by Redis?

Answer

By default, Redis uses port 6379 for client connections. If you want to change this port number to a different value, you can modify the port configuration option in the Redis configuration file (redis.conf). Here's a concise guide on how to change the default port:

1. Open the Redis Configuration File: On Linux systems, use the following command to open the file in the nano text editor:
   ```
   sudo nano /etc/redis/redis.conf
   ```
2. Locate the Port Configuration Line:
   Find the line that specifies the port:
   ```
   port 6379
   ```
3. Modify the Port Number:
   Change 6379 to your desired port number (e.g., 6380):
   ```
   port 6380
   ```
4. Save and Exit:
   Save the changes and close the editor. In nano, you can do this by pressing Ctrl+O to write the changes and Ctrl+X to exit.
5. Restart the Redis Server:
   Apply the changes by restarting the Redis server:
   ```
   sudo systemctl restart redis
   ```

After restarting, clients will need to connect using the new port number (6380 in this example).