In /usr/bin/dvipdf line 26:
if [ $# -lt 1 -o $# -gt 2 ]; then
              ^-- SC2166: Prefer [ p ] || [ q ] as [ p -o q ] is not well defined.


In /usr/bin/dvipdf line 27:
	echo "Usage: `basename \"$0\"` [options...] input.dvi [output.pdf]" 1>&2
                     ^---------------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
	echo "Usage: $(basename \"$0\") [options...] input.dvi [output.pdf]" 1>&2


In /usr/bin/dvipdf line 36:
	  *.dvi)	base=`basename "${infile}" .dvi` ;;
                             ^-------------------------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
	  *.dvi)	base=$(basename "${infile}" .dvi) ;;


In /usr/bin/dvipdf line 37:
	  *)		base=`basename "${infile}"` ;;
                             ^--------------------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
	  *)		base=$(basename "${infile}") ;;


In /usr/bin/dvipdf line 46:
exec dvips -Ppdf $DVIPSOPTIONS -q -f "$infile" | $GS_EXECUTABLE $OPTIONS -q -P- -dSAFER -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sstdout=%stderr -sOutputFile="$outfile" $OPTIONS -
                 ^-----------^ SC2086: Double quote to prevent globbing and word splitting.
                                                                ^------^ SC2086: Double quote to prevent globbing and word splitting.
                                                                                                                                                                     ^------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
exec dvips -Ppdf "$DVIPSOPTIONS" -q -f "$infile" | $GS_EXECUTABLE "$OPTIONS" -q -P- -dSAFER -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sstdout=%stderr -sOutputFile="$outfile" "$OPTIONS" -

For more information:
  https://www.shellcheck.net/wiki/SC2166 -- Prefer [ p ] || [ q ] as [ p -o q...
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...
  https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...