Ubuntu Texlive add package

The solution is listed as follows.

Using texlive on Ubuntu, the *.sty files are located at

/usr/share/texmf-texlive/tex/latex/
mine is /usr/share/texmf/tex/latex/

Adding a new style foo.sty usually means
create folder foo

sudo mkdir /usr/share/texmf-texlive/tex/latex/foo

copy the file foo.sty there

sudo cp foo.sty /usr/share/texmf-texlive/tex/latex/foo/

run texhash

sudo texhash

Works for me with texlive on Xubuntu 14.04LTS