dumpcap: add page (#8042)

pages/common/dumpcap.md

@@ -0,0 +1,20 @@
+# dumpcap
+
+> A network traffic dump tool.
+> More information: <https://www.wireshark.org/docs/man-pages/dumpcap.html>.
+
+- Display available interfaces:
+
+`dumpcap --list-interfaces`
+
+- Capture packets on a specific interface:
+
+`dumpcap --interface {{1}}`
+
+- Capture packets to a specific location:
+
+`dumpcap --interface {{1}} -w {{path/to/output_file.pcapng}}`
+
+- Write to a ring buffer with a specific max file limit of a specific size:
+
+`dumpcap --interface {{1}} -w {{path/to/output_file.pcapng}} --ring-buffer filesize:{{500000}} --ring-buffer files:{{10}}`