Mondo rescue is not present in the official debian lenny repositories.
If you want install mondo using apt-get you’ll have to add the following to your /etc/apt/sources.list file:
deb ftp://ftp.mondorescue.org/debian 5.0 contrib
deb-src ftp://ftp.mondorescue.org/debian 5.0 contrib
Then run apt-get update and apt-get install mondo.
That's it.
mondoarchive
