Open source alternative for Canonical Landscape? [closed]
Solution 1:
For monitoring you can use Munin or Cacti and for management you could use Puppet. If it absolutely has to be web based, you can install ebox but it doesn't manage multiple servers (AFAIK).
Solution 2:
An answer to another question pointed me to app-dater which claims to support Debian, OpenSuSE and CentOS. I haven't tried it yet but it looks like a good alternative when it comes to keeping packages up-to-date. It has a cli UI only though.
Solution 3:
I would suggest the opensource tool http://theforeman.org