In /usr/bin/pdftexi2dvi line 6:
  && { UNAMES=`uname -s`; test "x$UNAMES" = xULTRIX; } 2>/dev/null \
              ^--------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
  && { UNAMES=$(uname -s); test "x$UNAMES" = xULTRIX; } 2>/dev/null \


In /usr/bin/pdftexi2dvi line 7:
  && { RUNNING_KSH=true; export RUNNING_KSH; exec /bin/ksh $0 ${1+"$@"}; }
                                                           ^-- SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
  && { RUNNING_KSH=true; export RUNNING_KSH; exec /bin/ksh "$0" ${1+"$@"}; }


In /usr/bin/pdftexi2dvi line 11:
  && { UNAMES=`uname -s`; test "x$UNAMES" = xAIX; } 2>/dev/null \
              ^--------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
  && { UNAMES=$(uname -s); test "x$UNAMES" = xAIX; } 2>/dev/null \


In /usr/bin/pdftexi2dvi line 12:
  && { RUNNING_BSH=true; export RUNNING_BSH; exec /bin/bsh $0 ${1+"$@"}; }
                                                           ^-- SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
  && { RUNNING_BSH=true; export RUNNING_BSH; exec /bin/bsh "$0" ${1+"$@"}; }


In /usr/bin/pdftexi2dvi line 16:
test -n "${ZSH_VERSION+set}" && alias -g '${1+"$@"}'='"$@"'
                                         ^----------------^ SC2142: Aliases can't use positional parameters. Use a function.


In /usr/bin/pdftexi2dvi line 18:
rcs_revision='$Revision$'
             ^----------^ SC2016: Expressions don't expand in single quotes, use double quotes for that.


In /usr/bin/pdftexi2dvi line 19:
rcs_version=`set - $rcs_revision; echo $2`
            ^----------------------------^ SC2006: Use $(...) notation instead of legacy backticked `...`.
                                       ^-- SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
rcs_version=$(set - $rcs_revision; echo "$2")

For more information:
  https://www.shellcheck.net/wiki/SC2142 -- Aliases can't use positional para...
  https://www.shellcheck.net/wiki/SC2016 -- Expressions don't expand in singl...
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...