ps -ef displays kerneloops - is that harmful?
No it's not harmful...
apt show kerneloops
kerneloops is a daemon that collects kernel crash information and then submits the extracted signature to the oops.kernel.org website for statistical analysis and presentation to the Linux kernel developers.
If you have aptitude
installed you can run:
aptitude why kerneloops
to see why it has been installed (if it wasn't installed by default).
I guess it's installed by default, because at least you should have ubuntu-desktop
installed on a default installation (Main flavor) and it's depend on kerneloops
:
$ apt-cache rdepends kerneloops | grep desk
lubuntu-qt-desktop
lubuntu-gtk-desktop
lubuntu-desktop
xubuntu-desktop
vanilla-gnome-desktop
ubuntustudio-desktop-core
ubuntustudio-desktop
ubuntukylin-desktop
ubuntu-mate-desktop
ubuntu-budgie-desktop
lubuntu-qt-desktop
lubuntu-gtk-desktop
lubuntu-desktop
kubuntu-desktop
ubuntu-desktop