Script to verify that a path is synchronized across multiple machines via ssh

This is a script I wrote for work to look through a number of remote servers via ssh (shared keys or include a .pem (id_rsa) file to compare a paths and all it’s subfolders.

The result is a report of which files are out of synch and if duplicates found they are listed separately.

#!/bin/bash
## Parameters  sync_check [-i id.pem] [-u <user for ssh>] -p <path_to_diff>  <target-system-IP1> <target-system-IP2> ...

# David Saliba [dx@sudoall.com]

RED='\033[0;31m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color


PEMFILE=""
SSH_USER="root"

function usage {
	echo 
	echo -e "\t$0 usage as follows :"
	echo -e "\t$0 [-i <pem_file>] [-u <ssh_user_name>] -p <path_to_diff> <ref-system-IPADDR1> <target-system-IP1> <target-system-IP2>..."
	echo 
}


[ $# -le 2 ] && echo && echo -e "${RED}Incorrect number of parameters ${NC}" && usage && exit 128


while getopts "i:u:p:" opt; do
echo $opt $OPTARG
  case $opt in
  	i ) PEMFILE=$OPTARG; shift $((OPTIND-1)); OPTIND=1 ; 
          if [[ -f "$PEMFILE" ]]; then 
              PEMFILE="-i ""$PEMFILE" 
          else
          	  echo "Pemfile : $PEMFILE not found. Quitting .. " 
          	  exit 1  
          fi
          ;;
	u ) SSH_USER=$OPTARG ; shift $((OPTIND-1)); OPTIND=1 ;;
	p ) PATH_TO_CHECK=$OPTARG ; shift $((OPTIND-1)); OPTIND=1 ;;
    * ) usage
       exit 128
  esac
done



extfile="_target.md5.sync_check"

		echo; echo

rm -f /tmp/*.sync_check
for i in $* ; do
	ipcalc -cs $i
	if [ $? == 0 ] ; then
		echo -n "Retrieving Signature List from ..  :[$i] : " 
		ssh $PEMFILE $SSH_USER@$i "hostname"

		COMMAND="ssh $PEMFILE $SSH_USER@$i \"find  $PATH_TO_CHECK -type f -exec md5sum {} \\; | sed -e 's/^/$i\t/'| sort -k 2 \""
		#echo "Running : $COMMAND  /tmp/$i""_target.md5.sync_check"
		bash -c "$COMMAND" > /tmp/$i$extfile
		
	else
		echo "Parameter $i not a valid IP skipping .."
	fi
done

echo ;echo; echo "Comparing data ... "; echo

 OLDIFS=$IFS; 
 IFS=$'\n'; 

 for i in `cat /tmp/*.sync_check  | sort -k3 | uniq -f 1 -c | sort | egrep -v "^[\ \t]*$#" | sort -k4 ` ;do 
 	
 	NUMBER_OF_HITS=`echo "$i" | awk '{print ($1)}'`

 	echo $i

 	if [ $NUMBER_OF_HITS -gt 1 ] ; then
 		
 		MD5Onward=`echo "$i" | awk '{print substr($0, index($0,$3))}'`
		echo -e -n "${YELLOW}"	
			grep -h "$MD5Onward" /tmp/*.sync_check  | awk '{print "\t\t",NR, $0}'
		echo -e -n "${NC}"	


 	fi


 done ;

 IFS=$OLDIFS


echo
echo

link to file here: http://jist.sudoall.com/sync_check/sync_check.sh

nJoy 😉