How can i install a third party software on the web, I am new on endless os, just install on my laptop this morning, when i use for a dew hour i realize that it’s is very different from the other linux distro, not arch, fedora, or slacko, i am sure that it is base in debian, but many command dose not work, especially “apt”, i even have a stupid mind to test pacman and yum 
, if “apt” command not work, i just stuck on the flatpak, i haven’t try the installer file “xxx.deb”, but i bet it is not that easy too.
BTW, what software that I need is Hardinfo for hardware and software information, i install it on any linux machine that i have, and the other one is xpadneo driver for the xbox controller, this is what i need now, but the later time maybe i will needing some other software too, if anybody can help, that very thankful 
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another thing, the flatpak apps center was very slow when install a apps, it took very long time to install, after it says the apps was finish install, some app “Pending”, the experience of software install is horrible on endless os, other things is “ok”, not very good but not bad too.