If you want to display only the latest posts from a specific subreddit, you need to use exactly the same names has defined in the API (ATTENTION: these names are case-sensitive).

Here is a list of all the names that work:

• html
• javascript
• webdev
• node
• npm
• powershell
• shell
• commandline
• bash
• computerscience
• linux
• Ubuntu
• linux4noobs
• Technology
• opensource
• ProgrammingLanguages