Module getting started - knowledge check - root flag

hello. I tried since 3 days to get the root flag. I have user shell, run linpeas.sh, LinEnum.sh, tried sudo , tried local exploit,… and now i have no idea what i should look for. Any help would be appreciated.
Thank You.

Ok. I do it right now. Sorry for question. i was stuck and was more easy than i think.
regards.