Cant boot anymore after command pkill x

[nikgnomic]

The first link in post #2 has additional links after “OK, I have a terminal prompt. What now?”

Try this:

@jonathon

The second thing to try

Log into a text console as above and run startx . This should either start X, in which case the issue lies with your Display Manager (e.g. GDM, LightDM, SDDM), OR you will be presented with some output and returned to the console. Of particular interest are Error (EE) lines.