traceroute
The Linux manual documents traceroute in 6 places. Pick the section you want.
lft.db (1)print the route packets trace to network host33 optstraceproto.db (1)print the route packets trace to network host33 optstraceroute-nanog (1)print the route packets trace to network host33 optstraceroute.db (1)print the route packets trace to network host33 optstraceroute6.db (1)print the route packets trace to network host33 optstcptraceroute.db (8)print the route packets trace to network host33 opts