tracepath: add page (#5744)

* tracepath: add page

* Apply suggestions from code review

Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com>

* specify the preferred initial port

* explain initial destination port better

* include IPv6 usage use case

* Update pages/linux/tracepath.md

Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com>

Co-authored-by: marchersimon <50295997+marchersimon@users.noreply.github.com>

pages/linux/tracepath.md

@@ -0,0 +1,28 @@
+# tracepath
+
+> Trace the path to a network host discovering MTU along this path.
+> More information: <https://manned.org/tracepath>.
+
+- A preferred way to trace the path to a host:
+
+`tracepath -p {{33434}} {{host}}`
+
+- Specify the initial destination port, useful with non-standard firewall settings:
+
+`tracepath -p {{destination_port}} {{host}} `
+
+- Print both hostnames and numerical IP addresses:
+
+`tracepath -b {{host}}`
+
+- Specify a maximum TTL (number of hops):
+
+`tracepath -m {{max_hops}} {{host}}`
+
+- Specify the initial packet length (defaults to 65535 for IPv4 and 128000 for IPv6):
+
+`tracepath -l {{packet_length}} {{host}}`
+
+- Use only IPv6 addresses:
+
+`tracepath -6 {{host}}`