I'd like to know what's the most publicly installed or widely used Linux system performance monitoring software that is available and compatible with Ubuntu 64 bit ?
I've installed Nagios in place for availability report but for the monitoring performance of more than 10 it is impractical to open SSH console running top for each server.
what I'd like to monitor is:
1. Disk space issue.
2. Resource hog.
3. Failed root / sudo login attempt.
4. anything else here ?
any kind of suggestion would be greatly appreciated.