Added systemd file, installer stats and ssh known host ignore option

CHANGELOG.md

@@ -14,7 +14,12 @@ KNOWN ISSUES
 RECENT CHANGES
 --------------
 
-! XX Mar 2016: osync v1.1 released
+! XX Apr 2016: osync v1.1 released
+! Updated documentation (+README.md file)
+- Redirected ERROR and WARN messages to stderr to systemd catches them into it's journal
+!- Added a systemd unit file (needs testing in file monitor mode yet)
+- Added an option to ignore ssh known hosts (use with caution, can lead to security risks), also updated upgrade script accordingly
+- Added optional installation statistics
 - Fixed a nasty bug with log writing and tree_list function
 - Improved mail fallback
 - Improved more logging

README.md

@@ -1,8 +1,8 @@
 osync
 =====
 
-A two way filesync script with fault tolerance, resuming, deletion backup and conflict backups running on linux and virtually any system supporting bash.
+A two way filesync script with fault tolerance, resume, soft deletion, conflictual file backups running on bash (linux, BSD and virtually any system supporting bash).
-File synchronization is bidirectional, based on rsync, and can be run manually, by cron, or triggered whenever a file changes on master.
+File synchronization is bidirectional, based on rsync, can be run manually, as scheduled task, or triggered on file changes.
 
 ## About
 
@@ -22,12 +22,14 @@ Osync uses a master / slave sync schema. It can sync local to local or local to
 Osync uses pidlocks to prevent multiple concurrent sync processes on/to the same master / slave replica. Be sure a sync process is finished before launching next one, or use osync-batch.
 You may launch concurrent sync processes on the same system but only for different master replicas.
 
-Currently, it has been tested on CentOS 5.x, 6.x, 7.x, Debian 6.0.7, Linux Mint 14, 15 and 16, Ubuntu 12.04 and 12.10, FreeBSD 8.3 and 10.1.
+Currently, it has been tested on CentOS 5.x, 6.x, 7.x, Debian 6.0.7, Linux Mint 14-17, Ubuntu 12.04 and 12.10, FreeBSD 8.3 and 10.1.
-Some users report osync to work on MacOS X too. Microsoft Windows is supported via MSYS environment.
+Microsoft Windows is supported via MSYS or Cygwin.
+Some users report osync to work on MacOS X too.
+
 
 ## Installation
 
-Please note that development of version 1.1 has begun. Stable release is v1.01.
+Stable release is v1.1 and will be the last of v1 series.
 
 Osync has been designed to not delete any data, but rather make backups of conflictual files or soft deletes.
 Nevertheless, you should always have a neat backup of your data before trying a new sync tool.
@@ -36,7 +38,7 @@ You can download the latest stable release of Osync at www.netpower.fr/osync or
 
 You may also get the last development version at https://github.com/deajan/osync with the following command
 
-	$ git clone -b "v1.01" https://github.com/deajan/osync
+	$ git clone -b "v1.1" https://github.com/deajan/osync
 	$ sh install.sh
 
 Osync will install itself to /usr/local/bin and an example configuration file will be installed to /etc/osync
@@ -49,6 +51,17 @@ If bash is not your default shell, you may invoke it using
 On *BSD, be sure to have bash installed.
 On MSYS, On top of your basic install, you need msys-rsync and msys-coreutils-ext packages.
 
+## Upgrade from v1.0x
+
+Since osync v1.1 the config file format has changed in semantics and adds new config options.
+Also, master is now called initiator and slave is now called target.
+
+You can upgrade all v1.0x config files by running the upgrade script
+
+	$ ./upgrade-v1.0x-v1.1x.sh /etc/osync/your-config-file.conf
+
+The script will backup your config file, update it's content and try to connect to master and remote replicas to update the state dir.
+
 ## Usage
 
 Osync can work with in three flavors: Quick sync mode, configuration file mode, and daemon mode.
@@ -114,6 +127,11 @@ You may run the install.sh script which should work in most cases or copy the fi
 	$ service osync-srv start
 	$ chkconfig osync-srv on
 
+Systemd specific
+
+	$ systemctl start osync-srv@configfile
+	$ systemctl enable osync-srv@configfile
+
 Troubleshooting
 ---------------
 You may find osync's logs in /var/log/osync-*.log (or current directory if /var/log is not writable).

dev/debug_osync.sh

@@ -5,13 +5,13 @@
 #TODO: explain why osync daemon process can still exist after quit for 30s
 
 PROGRAM="osync" # Rsync based two way sync engine with fault tolerance
-AUTHOR="(L) 2013-2016 by Orsiris de Jong"
+AUTHOR="(C) 2013-2016 by Orsiris de Jong"
 CONTACT="http://www.netpower.fr/osync - ozy@netpower.fr"
 PROGRAM_VERSION=1.1-dev
 PROGRAM_BUILD=2016031002
 IS_STABLE=no
 
-## FUNC_BUILD=2016032201
+## FUNC_BUILD=2016032901
 ## BEGIN Generic functions for osync & obackup written in 2013-2016 by Orsiris de Jong - http://www.netpower.fr - ozy@netpower.fr
 
 ## type -p does not work on platforms other than linux (bash). If if does not work, always assume output is not a zero exitcode
@@ -95,11 +95,15 @@ function Dummy {
 }
 
 function _Logger {
-	local svalue="${1}" # What to log to screen
+	local svalue="${1}" # What to log to stdout
 	local lvalue="${2:-$svalue}" # What to log to logfile, defaults to screen value
+	local evalue="${3}" # What to log to stderr
 	echo -e "$lvalue" >> "$LOG_FILE"
 
-	if [ $_SILENT -eq 0 ]; then
+	# <OSYNC SPECIFIC> Special case in daemon mode where systemctl doesn't need double timestamps
+	if [ "$sync_on_changes" == "1" ]; then
+		cat <<< "$evalue" 1>&2	# Log to stderr in daemon mode
+	elif [ $_SILENT -eq 0 ]; then
 		echo -e "$svalue"
 	fi
 }
@@ -117,15 +121,15 @@ function Logger {
 	# </OSYNC SPECIFIC>
 
 	if [ "$level" == "CRITICAL" ]; then
-		_Logger "$prefix\e[41m$value\e[0m" "$prefix$level:$value"
+		_Logger "$prefix\e[41m$value\e[0m" "$prefix$level:$value" "$level:$value"
 		ERROR_ALERT=1
 		return
 	elif [ "$level" == "ERROR" ]; then
-		_Logger "$prefix\e[91m$value\e[0m" "$prefix$level:$value"
+		_Logger "$prefix\e[91m$value\e[0m" "$prefix$level:$value" "$level:$value"
 		ERROR_ALERT=1
 		return
 	elif [ "$level" == "WARN" ]; then
-		_Logger "$prefix\e[93m$value\e[0m" "$prefix$level:$value"
+		_Logger "$prefix\e[93m$value\e[0m" "$prefix$level:$value" "$level:$value"
 		WARN_ALERT=1
 		return
 	elif [ "$level" == "NOTICE" ]; then
@@ -276,7 +280,7 @@ function SendAlert {
 
 	# pfSense specific
 	if [ -f /usr/local/bin/mail.php ]; then
-		cmd="echo \"$MAIL_ALERT_MSG\" | /usr/local/bin/mail.php subject=\"$subject\""
+		cmd="echo \"$MAIL_ALERT_MSG\" | /usr/local/bin/mail.php -s=\"$subject\""
 		Logger "Mail cmd: $cmd" "DEBUG"
 		eval $cmd
 		if [ $? != 0 ]; then
@@ -875,6 +879,11 @@ function PreInit {
                 SSH_COMP=
         fi
 
+	## Ignore SSH known host verification
+	if [ "$SSH_IGNORE_KNOWN_HOSTS" == "yes" ]; then
+		SSH_OPTS="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"
+	fi
+
         ## Support for older config files without RSYNC_EXECUTABLE option
         if [ "$RSYNC_EXECUTABLE" == "" ]; then
                 RSYNC_EXECUTABLE=rsync
@@ -976,7 +985,7 @@ function PostInit {
         __CheckArguments 0 $# ${FUNCNAME[0]} "$@"    #__WITH_PARANOIA_DEBUG
 
 	# Define remote commands
-        SSH_CMD="$(type -p ssh) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY $REMOTE_USER@$REMOTE_HOST -p $REMOTE_PORT"
+        SSH_CMD="$(type -p ssh) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY $SSH_IGNORE_KNOWN_HOSTS $REMOTE_USER@$REMOTE_HOST -p $REMOTE_PORT"
         SCP_CMD="$(type -p scp) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY -P $REMOTE_PORT"
         RSYNC_SSH_CMD="$(type -p ssh) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY -p $REMOTE_PORT"
 }

dev/merge.sh

@@ -49,5 +49,5 @@ Unexpand
 Merge
 CleanDebug
 rm -f tmp_$PROGRAM.sh
-rm -f tmp_install.sh
+rm -f ../tmp_install.sh
 CopyCommons

dev/n_osync.sh

@@ -5,7 +5,7 @@
 #TODO: explain why osync daemon process can still exist after quit for 30s
 
 PROGRAM="osync" # Rsync based two way sync engine with fault tolerance
-AUTHOR="(L) 2013-2016 by Orsiris de Jong"
+AUTHOR="(C) 2013-2016 by Orsiris de Jong"
 CONTACT="http://www.netpower.fr/osync - ozy@netpower.fr"
 PROGRAM_VERSION=1.1-dev
 PROGRAM_BUILD=2016031002

dev/ofunctions.sh

@@ -1,4 +1,4 @@
-## FUNC_BUILD=2016032201
+## FUNC_BUILD=2016032901
 ## BEGIN Generic functions for osync & obackup written in 2013-2016 by Orsiris de Jong - http://www.netpower.fr - ozy@netpower.fr
 
 ## type -p does not work on platforms other than linux (bash). If if does not work, always assume output is not a zero exitcode
@@ -82,11 +82,15 @@ function Dummy {
 }
 
 function _Logger {
-	local svalue="${1}" # What to log to screen
+	local svalue="${1}" # What to log to stdout
 	local lvalue="${2:-$svalue}" # What to log to logfile, defaults to screen value
+	local evalue="${3}" # What to log to stderr
 	echo -e "$lvalue" >> "$LOG_FILE"
 
-	if [ $_SILENT -eq 0 ]; then
+	# <OSYNC SPECIFIC> Special case in daemon mode where systemctl doesn't need double timestamps
+	if [ "$sync_on_changes" == "1" ]; then
+		cat <<< "$evalue" 1>&2	# Log to stderr in daemon mode
+	elif [ $_SILENT -eq 0 ]; then
 		echo -e "$svalue"
 	fi
 }
@@ -104,15 +108,15 @@ function Logger {
 	# </OSYNC SPECIFIC>
 
 	if [ "$level" == "CRITICAL" ]; then
-		_Logger "$prefix\e[41m$value\e[0m" "$prefix$level:$value"
+		_Logger "$prefix\e[41m$value\e[0m" "$prefix$level:$value" "$level:$value"
 		ERROR_ALERT=1
 		return
 	elif [ "$level" == "ERROR" ]; then
-		_Logger "$prefix\e[91m$value\e[0m" "$prefix$level:$value"
+		_Logger "$prefix\e[91m$value\e[0m" "$prefix$level:$value" "$level:$value"
 		ERROR_ALERT=1
 		return
 	elif [ "$level" == "WARN" ]; then
-		_Logger "$prefix\e[93m$value\e[0m" "$prefix$level:$value"
+		_Logger "$prefix\e[93m$value\e[0m" "$prefix$level:$value" "$level:$value"
 		WARN_ALERT=1
 		return
 	elif [ "$level" == "NOTICE" ]; then
@@ -263,7 +267,7 @@ function SendAlert {
 
 	# pfSense specific
 	if [ -f /usr/local/bin/mail.php ]; then
-		cmd="echo \"$MAIL_ALERT_MSG\" | /usr/local/bin/mail.php subject=\"$subject\""
+		cmd="echo \"$MAIL_ALERT_MSG\" | /usr/local/bin/mail.php -s=\"$subject\""
 		Logger "Mail cmd: $cmd" "DEBUG"
 		eval $cmd
 		if [ $? != 0 ]; then
@@ -862,6 +866,11 @@ function PreInit {
                 SSH_COMP=
         fi
 
+	## Ignore SSH known host verification
+	if [ "$SSH_IGNORE_KNOWN_HOSTS" == "yes" ]; then
+		SSH_OPTS="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"
+	fi
+
         ## Support for older config files without RSYNC_EXECUTABLE option
         if [ "$RSYNC_EXECUTABLE" == "" ]; then
                 RSYNC_EXECUTABLE=rsync
@@ -963,7 +972,7 @@ function PostInit {
         __CheckArguments 0 $# ${FUNCNAME[0]} "$@"    #__WITH_PARANOIA_DEBUG
 
 	# Define remote commands
-        SSH_CMD="$(type -p ssh) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY $REMOTE_USER@$REMOTE_HOST -p $REMOTE_PORT"
+        SSH_CMD="$(type -p ssh) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY $SSH_IGNORE_KNOWN_HOSTS $REMOTE_USER@$REMOTE_HOST -p $REMOTE_PORT"
         SCP_CMD="$(type -p scp) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY -P $REMOTE_PORT"
         RSYNC_SSH_CMD="$(type -p ssh) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY -p $REMOTE_PORT"
 }

install.sh

@@ -4,7 +4,7 @@ PROGRAM=osync
 PROGRAM_VERSION=1.1-dev
 PROGRAM_BINARY=$PROGRAM".sh"
 PROGRAM_BATCH=$PROGRAM"-batch.sh"
-SCRIPT_BUILD=2016032502
+SCRIPT_BUILD=2016032903
 
 ## osync / obackup daemon install script
 ## Tested on RHEL / CentOS 6 & 7, Fedora 23, Debian 7 & 8, Mint 17 and FreeBSD 8 & 10
@@ -12,7 +12,10 @@ SCRIPT_BUILD=2016032502
 
 CONF_DIR=/etc/$PROGRAM
 BIN_DIR=/usr/local/bin
-SERVICE_DIR=/etc/init.d
+SERVICE_DIR_INIT=/etc/init.d
+SERVICE_FILE_INIT="osync-srv"
+SERVICE_DIR_SYSTEMD=/usr/lib/systemd/system
+SERVICE_FILE_SYSTEMD="osync-srv@.service"
 
 USER=root
 
@@ -38,6 +41,17 @@ if [ "$(whoami)" != "$USER" ]; then
   exit 1
 fi
 
+if [ -f /sbin/init ]; then
+	if file /sbin/init | grep systemd > /dev/null; then
+		init=systemd
+	else
+		init=init
+	fi
+else
+	echo "Can't detect init system."
+	exit 1
+fi
+
 if [ ! -d "$CONF_DIR" ]; then
 	mkdir "$CONF_DIR"
 	if [ $? == 0 ]; then
@@ -95,13 +109,26 @@ if [  -f "./ssh_filter.sh" ]; then
 	fi
 fi
 
-if [ -f "./osync-srv" ]; then
+if ([ -f "./$SERVICE_FILE_INIT" ] || [ -f "./$SERVICE_FILE_SYSTEMD" ] ); then
-	cp "./osync-srv" "$SERVICE_DIR"
+	if [ "$init" == "systemd" ]; then
+		cp "./$SERVICE_FILE_SYSTEMD" "$SERVICE_DIR_SYSTEMD"
 		if [ $? != 0 ]; then
-		echo "Cannot copy osync-srv to [$SERVICE_DIR]."
+			echo "Cannot copy the systemd file to [$SERVICE_DIR_SYSTEMD]."
 		else
-		chmod 755 "$SERVICE_DIR/osync-srv"
+			echo "Created osync-srv service in [$SERVICE_DIR_SYSTEMD]."
-		echo "Created osync-srv service in [$SERVICE_DIR]."
+			echo "Activate with [systemctl start osync-srv@instance.conf] where instance.conf is the name of the config file in /etc/osync."
+			echo "Enable on boot with [systemctl enable osync-srv@instance.conf]."
+		fi
+	elif [ "$init" == "init" ]; then
+		cp "./$SERVICE_FILE_INIT" "$SERVICE_DIR_INIT"
+		if [ $? != 0 ]; then
+			echo "Cannot copy osync-srv to [$SERVICE_DIR_INIT]."
+		else
+			chmod 755 "$SERVICE_DIR_INIT/$SERVICE_FILE_INIT"
+			echo "Created osync-srv service in [$SERVICE_DIR_INIT]."
+			echo "Activate with [service $SERVICE_FILE_INIT start]."
+			echo "Enable on boot with [chkconfig $SERVICE_FILE_INIT on]."
+		fi
 	fi
 fi
 

osync-batch.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 SUBPROGRAM=osync
 PROGRAM="$SUBPROGRAM-batch" # Batch program to run osync / obackup instances sequentially and rerun failed ones
-AUTHOR="(L) 2013-2016 by Orsiris de Jong"
+AUTHOR="(C) 2013-2016 by Orsiris de Jong"
 CONTACT="http://www.netpower.fr - ozy@netpower.fr"
 PROGRAM_BUILD=2016031301
 

osync-srv@.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=A robust two way (bidirectional) file sync script based on rsync with fault tolerance
+After=time-sync.target local-fs.target network-online.target
+Requires=time-sync.target local-fs.target
+Wants=network-online.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/osync.sh /etc/osync/%i --on-changes --silent
+
+[Install]
+WantedBy=multi-user.target

osync.sh

@@ -5,13 +5,13 @@
 #TODO: explain why osync daemon process can still exist after quit for 30s
 
 PROGRAM="osync" # Rsync based two way sync engine with fault tolerance
-AUTHOR="(L) 2013-2016 by Orsiris de Jong"
+AUTHOR="(C) 2013-2016 by Orsiris de Jong"
 CONTACT="http://www.netpower.fr/osync - ozy@netpower.fr"
 PROGRAM_VERSION=1.1-dev
 PROGRAM_BUILD=2016031002
 IS_STABLE=no
 
-## FUNC_BUILD=2016032201
+## FUNC_BUILD=2016032901
 ## BEGIN Generic functions for osync & obackup written in 2013-2016 by Orsiris de Jong - http://www.netpower.fr - ozy@netpower.fr
 
 ## type -p does not work on platforms other than linux (bash). If if does not work, always assume output is not a zero exitcode
@@ -90,11 +90,15 @@ function Dummy {
 }
 
 function _Logger {
-	local svalue="${1}" # What to log to screen
+	local svalue="${1}" # What to log to stdout
 	local lvalue="${2:-$svalue}" # What to log to logfile, defaults to screen value
+	local evalue="${3}" # What to log to stderr
 	echo -e "$lvalue" >> "$LOG_FILE"
 
-	if [ $_SILENT -eq 0 ]; then
+	# <OSYNC SPECIFIC> Special case in daemon mode where systemctl doesn't need double timestamps
+	if [ "$sync_on_changes" == "1" ]; then
+		cat <<< "$evalue" 1>&2	# Log to stderr in daemon mode
+	elif [ $_SILENT -eq 0 ]; then
 		echo -e "$svalue"
 	fi
 }
@@ -112,15 +116,15 @@ function Logger {
 	# </OSYNC SPECIFIC>
 
 	if [ "$level" == "CRITICAL" ]; then
-		_Logger "$prefix\e[41m$value\e[0m" "$prefix$level:$value"
+		_Logger "$prefix\e[41m$value\e[0m" "$prefix$level:$value" "$level:$value"
 		ERROR_ALERT=1
 		return
 	elif [ "$level" == "ERROR" ]; then
-		_Logger "$prefix\e[91m$value\e[0m" "$prefix$level:$value"
+		_Logger "$prefix\e[91m$value\e[0m" "$prefix$level:$value" "$level:$value"
 		ERROR_ALERT=1
 		return
 	elif [ "$level" == "WARN" ]; then
-		_Logger "$prefix\e[93m$value\e[0m" "$prefix$level:$value"
+		_Logger "$prefix\e[93m$value\e[0m" "$prefix$level:$value" "$level:$value"
 		WARN_ALERT=1
 		return
 	elif [ "$level" == "NOTICE" ]; then
@@ -265,7 +269,7 @@ function SendAlert {
 
 	# pfSense specific
 	if [ -f /usr/local/bin/mail.php ]; then
-		cmd="echo \"$MAIL_ALERT_MSG\" | /usr/local/bin/mail.php subject=\"$subject\""
+		cmd="echo \"$MAIL_ALERT_MSG\" | /usr/local/bin/mail.php -s=\"$subject\""
 		Logger "Mail cmd: $cmd" "DEBUG"
 		eval $cmd
 		if [ $? != 0 ]; then
@@ -806,6 +810,11 @@ function PreInit {
                 SSH_COMP=
         fi
 
+	## Ignore SSH known host verification
+	if [ "$SSH_IGNORE_KNOWN_HOSTS" == "yes" ]; then
+		SSH_OPTS="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"
+	fi
+
         ## Support for older config files without RSYNC_EXECUTABLE option
         if [ "$RSYNC_EXECUTABLE" == "" ]; then
                 RSYNC_EXECUTABLE=rsync
@@ -906,7 +915,7 @@ function PreInit {
 function PostInit {
 
 	# Define remote commands
-        SSH_CMD="$(type -p ssh) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY $REMOTE_USER@$REMOTE_HOST -p $REMOTE_PORT"
+        SSH_CMD="$(type -p ssh) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY $SSH_IGNORE_KNOWN_HOSTS $REMOTE_USER@$REMOTE_HOST -p $REMOTE_PORT"
         SCP_CMD="$(type -p scp) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY -P $REMOTE_PORT"
         RSYNC_SSH_CMD="$(type -p ssh) $SSH_COMP -i $SSH_RSA_PRIVATE_KEY -p $REMOTE_PORT"
 }

sync.conf

@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 
 ###### Osync - Rsync based two way sync engine with fault tolerance
-###### (L) 2013-2015 by Orsiris "Ozy" de Jong (www.netpower.fr)
+###### (C) 2013-2015 by Orsiris "Ozy" de Jong (www.netpower.fr)
-###### Config file rev 2016012701
+###### Config file rev 2016032901
 
 ## ---------- GENERAL OPTIONS
 
@@ -63,6 +63,9 @@ PATH_SEPARATOR_CHAR=";"
 ## ssh compression should be used unless your remote connection is good enough (LAN)
 SSH_COMPRESSION=yes
 
+## Ignore ssh known hosts. DANGER WILL ROBINSON DANGER ! This can lead to security issues. Only enable this if you know what you're doing.
+SSH_IGNORE_KNOWN_HOSTS=no
+
 ## Check for connectivity to remote host before launching remote sync task. Be sure the hosts responds to ping. Failing to ping will stop sync.
 REMOTE_HOST_PING=no
 

upgrade-v1.0x-v1.1x.sh

@@ -2,11 +2,11 @@
 
 PROGRAM="osync instance upgrade script"
 SUBPROGRAM="osync"
-AUTHOR="(L) 2015 by Orsiris \"Ozy\" de Jong"
+AUTHOR="(C) 2015 by Orsiris \"Ozy\" de Jong"
 CONTACT="http://www.netpower.fr/osync - ozy@netpower.fr"
 OLD_PROGRAM_VERSION="1.0x"
 NEW_PROGRAM_VERSION="v1.1x"
-PROGRAM_BUILD=2016021101
+PROGRAM_BUILD=2016032901
 
 function Init {
 	OSYNC_DIR=".osync_workdir"
@@ -333,6 +333,9 @@ function RewriteConfigFiles {
 		sed -i '/^LOGFILE=*/a RSYNC_PATTERN_FIRST=include' "$config_file"
 	fi
 
+       	if ! grep "^SSH_IGNORE_KNOWN_HOSTS=" "$config_file" > /dev/null; then
+                sed -i '/^SSH_COMPRESSION=*/a SSH_IGNORE_KNOWN_HOSTS=no' "$config_file"
+
 	if ! grep "^RSYNC_INCLUDE_PATTERN=" "$config_file" > /dev/null; then
 		sed -i '/^RSYNC_EXCLUDE_PATTERN=*/a RSYNC_INCLUDE_PATTERN=""' "$config_file"
 	fi