diff --git a/grader-process-check.SAMPLE b/grader-process-check.SAMPLE
--- a/grader-process-check.SAMPLE
+++ b/grader-process-check.SAMPLE
@@ -1,9 +1,12 @@
 #!/bin/bash
-count=`ps aux | grep "algo_grader" | grep "grader grading queue" | wc -l`
 install_dir=/home/john/cafe_grader
 ruby_executable=/home/john/.rvm/wrappers/ruby-2.3.0/ruby
+
+#check number of running grader
+count=`ps aux | grep $install_dir | grep "grader grading queue" | wc -l`
+
+#if there is no grader running, start a new one
 if [ $count -lt 1 ]; then
-  cd $judge_dir/judge
+  cd $install_dir/judge
   $ruby_executable $install_dir/judge/scripts/grader grading queue > $install_dir/judge/grading.log &
 fi
-