YouTrack installation Issues

Hello all,

I'm currently trying to get YouTrack standalone working. I followed the instructions on the YouTrack website: http://confluence.jetbrains.com/display/YTD6/YouTrack+JAR+as+a+Service+on+Linux

I followed all the instructions but when I type the command service youtrack start I get this error:

/etc/init.d/youtrack: 21: /etc/init.d/youtrack: pushd: not found
Starting youtrack...
"/home/youtrack/standalone/bin/wrapper" "/home/youtrack/standalone/conf/wrapper.conf" wrapper.syslog.ident=youtrack wrapper.pidfile="/home/youtrack/standalone//youtrack.pid" wrapper.daemonize=TRUE

There was a previous thread about this issue:
http://forum.jetbrains.com/thread/YouTrack-254
The problem is the OP never mentioned how to fix the issue. Is there anybody out there that can help me out?