Is there a way to convert all Linux man pages to either plain text, html or markdown?
I need to do this for every man file I have installed on my system.
Yes... To convert one of them, say, man of man:
zcat /usr/share/man/man1/man.1.gz | groff -mandoc -Thtml
If you want 'all of installed on your PC', you just iterate through them. For different output (text, for example), use different 'device' (the -T argument).
Just in case... if the 'iteration' was the real problem, you can use:
OUT_DIR=... for i in `find -name '*.gz'`; do dname=`dirname $i` mkdir -p $OUT_DIR/$dname zcat $i | groff -mandoc -Thtml > $OUT_DIR/$i.html done