Today I had to work with some pdf files.
Actually, I needed to convert some LibreOffice files to pdf format. That was not a problem: it was as easy as clicking the button "export as pdf."
The problem was that I needed to add an image to a specific page and that for some strange reason was not possible on LibreOffice. Well, it was, but moving or resizing did not work.
Thus, I thought of Inkscape. Still, Inkscape only works with one page at a time and thus I ended up with a split document.
Now, merging pdfs on Linux is not hard. I followed this tutorial.
And that took care of the problem!
I learned a useful command on the CLI: pdfunite.