A Undocumented Command
terminal exec prompt timestamp
And here a Sample:
evil-router#terminal exec prompt timestamp
evil-router#show ip route
Load for five secs: 0%/0%; one minute: 1%; five minutes: 1%
Time source is hardware calendar, *20:39:37.135 UTC Sun Jun 1 2008
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.2.0/24 is directly connected, FastEthernet0