I'm new to Zimbra and I'm trying to install it on ubuntu, Though I get this error when I'm installing it:

Setting up syslog.conf.../opt/zimbra/bin/zmsyslogsetup: line 108: killall: command not found Failed

Code:
Done
Setting MTA auth host...Done
Creating domain zimbra.drift24.se...Done
Creating user admin@zimbra.drift24.se...Done
Creating postmaster alias...Done
Creating user wiki@zimbra.drift24.se...Done
Creating user spam.o9xkptagt@zimbra.drift24.se...Done
Creating user ham.ebtekmxyb@zimbra.drift24.se...Done
Setting spam training accounts...Done
Initializing store sql database...Done
Setting zimbraSmtpHostname for zimbra.drift24.se...Done
Initializing logger sql database...Done
Initializing mta config...Done
Configuring SNMP...Done
Setting services on zimbra.drift24.se...Done
Setting up zimbra crontab...sh: crontab: command not found
Done
Setting up syslog.conf.../opt/zimbra/bin/zmsyslogsetup: line 108: killall: command not found
Failed

You have the option of notifying Zimbra of your installation.
This helps us to track the uptake of the Zimbra Collaboration Suite.
The only information that will be transmitted is:
        The VERSION of zcs installed (4.5.3_GA_733_UBUNTU6)
        The ADMIN EMAIL ADDRESS created (admin@zimbra.drift24.se)

Notify Zimbra of your installation? [Yes] n
Notification skipped
Starting servers...Done.
Installing zimlets...
        com_zimbra_email
        com_zimbra_phone
        com_zimbra_date
        com_zimbra_search
        com_zimbra_url
Done
Initializing Documents...Done
Restarting tomcat...Done


Operations logged to /tmp/zmsetup.log.4629


Configuration complete - press return to exit
And now after the install is complete I cant see any status data from the administration website. I dont know why I did get that error or how I can correct it, maybe some of you might?

thanks.