Over about the last week or two, I have been seeing something odd with my Linux mint PC.
Over a day or 2, at some point, my CPU usage hits and saturates at or near 100 at some point (according to my conky, htop shows 1 of my CPUs saturated at 100% in red). Now I see that my memory usage is starting to reach extremely high levels (3gb) while the highest mem usage process is firefox, by far(600mb).
Is it possible I have some sort of virus/malware/rootkit? I understand that this kind of behavior is the forte of rootkits. If possible, is there a way for me to fix this? Or just reinstall?
TL;DR - Often my CPU Usage and/or my Mem Usage is high, but top/htop do not show any processes that might be responsible for this.