I have installed TeXlive from texlive.org and all I need to do now is, too say to my ubuntu system that TeXlive is installed.
I have found this which says:
Tell APT about your TeX Live installation by building a dummy package using equivs:
$ aptitude install equivs # as root mkdir /tmp/tl-equivs && cd /tmp/tl-equivs equivs-control texlive-local # edit texlive-local (see below) $ equivs-build texlive-local $ sudo dpkg -i texlive-local_2017-1_all.deb
At the step "edit texlive-local", edit the Maintainer field and the list of the packages provided by your local TeX Live installation as appropriate. If you installed scheme-full except collection-texinfo as recommended, the file should look like the following example file for TL 2017.
I am a bit new to ubuntu so sorry for the maybe stupid question: I just have to type the six line into the terminal (with that $ signs?) and what do I have to do at the forth line?