Failed Apply Kernel Variables error, what is it and how to fix it?

Question

linux

Here is the output of the command:

$ systemctl --failed
  UNIT                   LOAD   ACTIVE SUB    DESCRIPTION                
● systemd-sysctl.service loaded failed failed Apply Kernel Variables     

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

1 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.

And also, in addition to the error, sometimes ripples on the screen slip through

Answer 1

The first line in Google search for the text of the error is https://ubuntugeeks.com/questions/118526/failed-to...
You have crooked lines in /etc/sysctl.conf or /etc/sysctl.d files.