Well, I come with a big answer, for anybody having more or less the same problem. Many, many thanks to @Davislor for the previous answer and for the help. I am using Ubuntu 20.04.
I'll try to divide the problem because all the things that helped me where on different sites and for different problems, I'll try to give all the references and the credit for the ...
You don’t go into detail about how you installed TeX on your system, so it’s difficult to diagnose your problem.
However, you should not be running sudo latex. If you need to, your system is not properly configured. Either install the texlive packages you need on your system or do a custom installation. On Ubuntu, this is either texlive-publishers, or ...
Able to get all output files moved over to /tmp in latex suite with these lines added to .vimrc
let g:Tex_CompileRule_pdf='pdflatex --output-directory=/tmp -aux-directory=/tmp -interaction=nonstopmode $*'
let g:Tex_ViewRule_pdf='cd /tmp; AcroRd32'
Here I am in 2020 and I found that TeXWorks (Version 0.6.2 (Debian) [r.7ecce17, 2017-04-29 10:23 AM]) could not find the xcolor package from my TeXLive 2019 installation on Ubuntu 18.04 LTS while another IDE like TeXMaker could do it.
The fix was to bump up the path where the .sty file gets copied to (or the soft link to it anyway): /usr/local/bin, in the ...