When dealing with IP Appliances, where would you go to check information regarding: File system mounts and unmount; upgrade; reboot, backup etc..?

When dealing with IP Appliances, where would you go to check information regarding: File system mounts and unmount; upgrade; reboot, backup etc..?

A.
log under logfile

B.
log under audit

C.
log under system

D.
log under logSystem

E.
log under syslog