permission      userid   group   time        size    file                      status

 
-rwxr--r--   c66770   dephrs  1:00:00:00   1435    report.java      appeared
-rwxr--r--   c74570   dephrs  2:00:00:00   6993    report2.java     changed
-rwxr--r--   c34569   dephrs  2:00:00:00   6993    report3.sas     disappeared

#!/bin/bash


MONITORDIR=/opt/log.xlsx

cd /opt

NOW='date + %d%B%Y%H%M%S '

 "$MONITORDIR" > /opt/log.xlsx

   for fILE in ls -l $(find /foo/* -type f ) 
    do 
      md5sum "$(FILE)" cut -d " " -f1 > "$(MONITORDIR]"/"$(FILE)"
    done

  while :
  do

  NOW='date + %d%B%Y%H%M%S '

   for fILE in ls -l $(find /foo/* -type f ) 
     do 
  
   prev = 'cat "$(FILE)" || echo 0'
   if [-s "$(FILE); then

#it exists and has content
   md5=md5sum "$(FILE)" cut -d " " -f1 > "($MONITORDIR)"/"$(FILE)"
   
   if ["$prev" != "$md5"]; then

   case "$prev" in 
    0) echo "'date' $FILE appeared."
   *) echo "'date' $FILE changed."
   esac
  cp "$[FILE]" "$(MONITORDIR)/$(FILE).$NOW"
  
 fi
  else

# doesn't exist; did it exist before?

   if [$prev !=0]; then
   echo "date' :$FILE disappeared."
   echo > 0 "$(MONITORDIR)/$(FILE)"
   fi
 fi
 done
 sleep 10
 done

 mail -a /path/to/file/foo.xlsx -s "monitor directories and files report"         mary.email@example.com; 
jim.email@example.com