From 845668414fe12b23123564e31cf13f7ada765ac8 Mon Sep 17 00:00:00 2001
From: Felix Yan <felixonmars@gmail.com>
Date: Thu, 27 Feb 2014 00:51:09 +0800
Subject: [PATCH] add ss.md

---
 linux/ss.md | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 linux/ss.md

diff --git a/linux/ss.md b/linux/ss.md
new file mode 100644
index 000000000..9000f4fb1
--- /dev/null
+++ b/linux/ss.md
@@ -0,0 +1,19 @@
+# ss
+
+> Utility to investigate sockets
+
+- Dump all TCP/UDP/RAW/UNIX sockets
+
+`ss -a {{-t/-u/-w/-x}}`
+
+- Filter TCP sockets by states, only/exclude
+
+`ss {{state/exclude}} {{bucket/big/connected/synchronized/...}}`
+
+- Filter sockets by address and/or port
+
+`ss {{dst/src/dport/sport}} {{==/!=/>/</...}} {{prefix:port/unix:STRING/:port/...}}`
+
+- Only list IPv4 or IPv6 sockets
+
+`ss {{-4/-6}}`