Move pages under tldr, lint run.sh, update docs

tldr/linux/tshark

@@ -0,0 +1,41 @@
+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# tshark
+
+> Packet analysis tool, CLI version of Wireshark.
+> More information: <https://tshark.dev/>.
+
+- Monitor everything on localhost:
+
+`tshark`
+
+- Only capture packets matching a specific capture filter:
+
+`tshark -f '{{udp port 53}}'`
+
+- Only show packets matching a specific output filter:
+
+`tshark -Y '{{http.request.method == "GET"}}'`
+
+- Decode a TCP port using a specific protocol (e.g. HTTP):
+
+`tshark -d tcp.port=={{8888}},{{http}}`
+
+- Specify the format of captured output:
+
+`tshark -T {{json|text|ps|…}}`
+
+- Select specific fields to output:
+
+`tshark -T {{fields|ek|json|pdml}} -e {{http.request.method}} -e {{ip.src}}`
+
+- Write captured packet to a file:
+
+`tshark -w {{path/to/file}}`
+
+- Analyze packets from a file:
+
+`tshark -r {{path/to/file.pcap}}`