- chrony
Chrony daemon statistics: Local clock drift, offset to peers, etc.
+ - connectivity
+ Event-based interface status.
+
- conntrack
Number of nf_conntrack entries.
- processes
Process counts: Number of running, sleeping, zombie, ... processes.
+ - procevent
+ Listens for process starts and exits via netlink.
+
- protocols
Counts various aspects of network protocols such as IP, TCP, UDP, etc.