p>
as: https://github.com/rstudio/rmarkdown/issues/39
error message
LaTeX Error: File 'framed.sty' not found.
LaTeX Error: File 'titling.sty' not found.
solution
method 1
USES Tex’s TLMGR package to manage the installation of the missing.sty file
tlmgr install framed
method 2
on my system, TLMGR install: package already present: framed
but still reported an error, the following method successfully installed
yum install missing file
yum -y install texlive-framed
yum -y install texlive-titling
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