In /usr/bin/rpdcp line 4:
if test $PDSH_RCMD_TYPE; then
        ^-------------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
if test "$PDSH_RCMD_TYPE"; then


In /usr/bin/rpdcp line 10:
  PDSH_RCMD_TYPE=`cat /etc/pdsh/rcmd_default`
                 ^--------------------------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
  PDSH_RCMD_TYPE=$(cat /etc/pdsh/rcmd_default)

For more information:
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...
  https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...