Please add spaces between words: TheysharemanysimilaritiessuchasDesktopEnvironments,AnInitsystem(forthosewhodidnotswitchtosystemDinLinux),POSIXinterface,andmore.However,again,LinuxisnotUNIX,it'sjustaclone.
They share many similarities such as Desktop Environments, An Init system (for those who did not switch to systemD in Linux), POSIX interface, and more. However, again, Linux is not UNIX, it's just a clone.