svnsync problems

I have a little cron job that syncs two svn repos. It runs every ten minutes. For some reason it stopped working so I killed the job. Now when I try to manually run the job, I get:

Failed to get lock on destination repos, currently held by...

Great, the sync is broken!
Here is how to clear it up. Use the following command to remove the lock:

svn propdel --revprop -r0 svn:sync-lock file:///path/to/the/repository

This is the sync script:

svnsync synchronize file:///path/to/the/repository --username svnuser --password svnpassword

Rsync Between Servers Automatically

Part 1 – Setting up SSH key authentication

First, we need to make sure the DESTSERVER has the ability to use key authentication enabled. Find your sshd configuration file (usually ‘/etc/ssh/sshd_config’) and enable the following options if they are not already set.

RSAAuthentication yes
PubkeyAuthentication yes
AuthorizedKeysFile .ssh/authorized_keys

If you edit the file be sure to restart sshd afterwards.

# /etc/init.d/sshd restart

Next, on the SOURCESERVER we will create the public / private key pair to be used for authentication with the following command.

# ssh-keygen -t rsa
  • Note: Do not enter a passphrase for this, just hit enter when prompted.

This should create 2 files, a public key file and a private key file. The public key file (usually [homedir]/.ssh/ we will upload to the DESTSERVER. The private key file (usually [homedir]/.ssh/id_rsa) we will keep on the SOURCESERVER.

  • Be sure to keep this private key safe. With it anyone will be able to connect to the DESTSERVER that contains the public key.

Now we will plant the public key we created on to the DESTSERVER. Choose the user account which you will use to connect to on DESTSERVER, we’ll call this user ‘destuser’ for now.

In that account’s home directory, create a ‘.ssh’ subdirectory, and in that directory create a new text file called ‘authorized_keys’. If it already exists, great, use the existing file. Open the ‘authorized_keys’ file and paste in the contents of the public key you created in the previous step ( It should look something like the following

ssh-rsa <lots and lots of characters…> sourceuser@SOURCESERVER

Save the file and change the permissions to 600 for the file and 700 for the ‘.ssh’ directory.

Now to test that the keys are working. From the SOURCESERVER try logging in as normal using ssh to the DESTSERVER.

# ssh destuser@DESTSERVER

If all is working you should not be prompted for a password but instead connected directly to a shell on the DESTSERVER.

Part 2 – Creating the rsync script


Now for the rsync script.



echo $’\n\n’ >> $LOGFILE
for SERVER in web01 web02
        rsync -av –rsh=ssh $SOURCEPATH $DESTUSER@$SERVER:$DESTPATH 2>&1 >> $LOGFILE
        echo “Completed at: `/bin/date`” >> $LOGFILE
Part 3 – Setting up the cron job

This is optional. I assume web updates will be done manually.

Assuming everything has worked so far all that’s left is to setup a cron job to run the script automatically at a predefined interval.

Use the ‘crontab’ command to create a new cron job.

>sudo crontab -e -u updater

This will open an editor where you can schedule the job.

Enter the following to have the script run once every hour

0 * * * * /var/scripts/

Shell script to list current website IP

If your sites are in multiple geographical locations, this script will show where a site currently is being served from. It colors the output based on location.

#do a dig against the company name servers and spit out the current IP of the sites.

array=( )

for i in “${array[@]}”
dig $i a | grep -v ‘;’ |grep $i | awk ‘{ if ( substr($5, 1, 8) == “x.x.x” ) printf “%-30s %s\n”, “\033[1;32;40m”$5,$1; else printf “%-30s %s\n”, “\033[1;34;40m”$5,$1 }’

done | sort -n
tput sgr0

Deployment Script WIP

This is a work in progress…

SUBJECT=”  Prod Updated:from MANAGE01SRV”
echo “Job started at: `/bin/date`” > $LOGFILE
for SERVER in web01 web02 web03 web04
if $SERVER = “web01” then NSSRV = “wb01”
else NSSRV = “wb02”
ssh nsroot@netscaler ‘disable server site01_$NSSRV’
ssh $DESTUSER@$SERVER service apache2 stop >> $LOGFILE
rsync -avc –delete –exclude=”.git” –exclude=”var/” –exclude=”.gitignore” –rsh=ssh $SOURCEPATH $DESTUSER@$SERVER:$DESTPATH 2>&1 >> $LOGFILE
ssh $DESTUSER@$SERVER rm -rf $DESTPATH/var/cache/*
ssh $DESTUSER@$SERVER /var/scripts/ >> $LOGFILE
ssh $DESTUSER@$SERVER service apache2 start >> $LOGFILE
ssh nsroot@netscaler ‘enable server site01_$NSSRV’
echo “Job completed at: `/bin/date`” >> $LOGFILE
/usr/bin/mail -s “$SUBJECT” “$EMAIL” < $LOGFILE

Analyzing Apache Log Files

List Client IP and Count Hits

awk -F'[ “]+’ ‘$7 == “/” { ipcount[$1]++ } END { for (i in ipcount) { printf “%15s – %d\n”, i, ipcount[i] } }’ access.log


List Client IP and RDNS

cat access.log | awk ‘{print $1}’ | logresolve