In /usr/bin/scr_prerun line 13:
  if [ $SCR_DEBUG -gt 0 ] ; then
       ^--------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
  if [ "$SCR_DEBUG" -gt 0 ] ; then


In /usr/bin/scr_prerun line 19:
start_time=`date`
           ^----^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
start_time=$(date)


In /usr/bin/scr_prerun line 20:
start_secs=`date +%s`
           ^--------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
start_secs=$(date +%s)


In /usr/bin/scr_prerun line 29:
pardir=`$bindir/scr_prefix`
       ^------------------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
pardir=$($bindir/scr_prefix)


In /usr/bin/scr_prerun line 50:
if [ $? -ne 0 ] ; then
     ^-- SC2181: Check exit code directly with e.g. 'if mycmd;', not indirectly with $?.


In /usr/bin/scr_prerun line 56:
mkdir -p ${pardir}/.scr
         ^-------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
mkdir -p "${pardir}"/.scr


In /usr/bin/scr_prerun line 68:
rm -f ${pardir}/.scr/flush.scr
      ^-------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
rm -f "${pardir}"/.scr/flush.scr


In /usr/bin/scr_prerun line 69:
rm -f ${pardir}/.scr/nodes.scr
      ^-------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
rm -f "${pardir}"/.scr/nodes.scr


In /usr/bin/scr_prerun line 72:
end_time=`date`
         ^----^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
end_time=$(date)


In /usr/bin/scr_prerun line 73:
end_secs=`date +%s`
         ^--------^ SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
end_secs=$(date +%s)


In /usr/bin/scr_prerun line 74:
run_secs=$(($end_secs - $start_secs))
            ^-------^ SC2004: $/${} is unnecessary on arithmetic variables.
                        ^---------^ SC2004: $/${} is unnecessary on arithmetic variables.

For more information:
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...
  https://www.shellcheck.net/wiki/SC2004 -- $/${} is unnecessary on arithmeti...
  https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...