Hi recently I discovered that rootkits are a thing in Ubuntu too, and that their detection is hard. I has been pretty paranoid about getting one since I read about them.
I have my firewall enabled, I only connect to Internet in my home, I mainly download everything from Ubuntu software center and trusted repos/PPAs (libreoffice/noobslab themes) and download some deb packages from trusted sources (Brackets in example) I'm also using an AMP stack for educational propose and everytime I connect to the Internet I stop their services and I have all connections to the Apache denied and only my local ip added.
Is there any risk about the rootkits if I'm a normal user?
How someone can get infected by them if you need to give you conceal to install something?