Google used to have a custom search for Linux at google.com/linux but they discontinued it. Supposedly it's enough to add linux as a search term, but that doesn't always work well.
So here's a replacement: Linux Search
This is useful:
- if you want to avoid spammy search results
- when searching for a rarely used term such as a model number - such searches often give hits which mention merely Linux in a sidebar or footer etc, but where the page itself is are not actually about Linux.
By narrowing the search down to only Linux-specific websites, you avoid these problems.
If you find it useful, consider it a small thank you to the Linux community.