Network Vulnerability Scanners
What is the top (or top 2) Network Vulnerability Scanners for Linux?
The requirements for our Enterprise is:
1. Runs on Ubuntu linux
2. Updated or can be updated often.
3. Can be managed entirely from commmand line.
4. We need to be able to detect vulnerabilities in services that we often run such as: ssh, apache, php, ruby, mysql, etc
I've heard a little about Nessus, but the tutorials seem to reference a GUI based console.