晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/share/doc/traceroute/README
This is a new modern implementation of the traceroute(8)
utility for Linux systems.

Traceroute tracks the route packets taken from an IP network on their
way to a given host. It utilizes the IP protocol's time to live (TTL)
field and attempts to elicit an ICMP TIME_EXCEEDED response from each
gateway along the path to the host.

Main features:
- Full support for both IPv4 and IPv6 protocols
- Several tracerouting methods, including:
  * UDP datagrams (including udplite and udp to particlular port)
  * ICMP ECHO packets (including dgram icmp sockets)
  * TCP SYNs (in general, any TCP request with various flags and options)
  * DCCP Request packets
  * Generic IP datagrams
- UDP methods do not require root privileges
- Ability to send several probe packets at a time
- Ability to compute a proper time to wait for each probe
- perform AS path lookups for returned addresses
- show ICMP extensions, including MPLS
- perform path MTU discovery automatically
- show guessed number of hops in backward direction
- command line compatible with the original traceroute
- and much more, see traceroute(8)

This code was written from the scratch, using some ideas of
Olaf Kirch's traceroute, the original implementation of Van Jacobson
(which was long used before) and some current BSD's ones.

This traceroute requires Linux kernel 2.6 and higher.

You can try to contact the author at <Dmitry at Butskoy dot name> .


Good tracerouting!

Dmitry Butskoy

haha - 2025