In /usr/bin/rhost line 21:
echo $1 | jdresolve -r -n $2 $3 $4 -
     ^-- 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.
                                ^-- SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
echo "$1" | jdresolve -r -n "$2" "$3" "$4" -

For more information:
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...