Bing found the following results
Unix-like - Wikipedia
12 Best open-source Unix like operating systems as of 2024 - Slant
What is UNIX and what's UNIX-like? - Super User
Linux - Wikipedia
What's the Difference Between Linux and Unix? - How-To Geek
Guide to Unix/Why Unix-like - Wikibooks
Linux vs. Unix: What's the difference? | Opensource.com
Unix-like definition by The Linux Information Project (LINFO)
Linux kernel - Wikipedia
What is the Linux operating system? - TechTarget