From 4ebfabeb0a29e58e6ac06435601b81ad11c564d9 Mon Sep 17 00:00:00 2001 From: johannst Date: Thu, 14 Jan 2021 21:30:05 +0000 Subject: deploy: 4de58de1947bf4fcfe16db8e9d2c9c920b1441d1 --- monitor/index.html | 3 +- monitor/lsof.html | 10 ++- monitor/pgrep.html | 2 +- monitor/pidstat.html | 6 +- monitor/pmap.html | 2 +- monitor/pstack.html | 2 +- monitor/ss.html | 246 +++++++++++++++++++++++++++++++++++++++++++++++++++ 7 files changed, 261 insertions(+), 10 deletions(-) create mode 100644 monitor/ss.html (limited to 'monitor') diff --git a/monitor/index.html b/monitor/index.html index 38681d7..a301e57 100644 --- a/monitor/index.html +++ b/monitor/index.html @@ -81,7 +81,7 @@ @@ -151,6 +151,7 @@

Resource analysis & monitor

lsof
ss
pidstat
pgrep
pmap

Show open connections to localhost for $USER:

lsof -a -u $USER -i @localhost

Open connection to specific port

Show open connections to port :1234 for $USER:

lsof -a -u $USER -i :1234
+

IPv4 TCP connections in `ESTABLISHED` state

lsof -i 4TCP -s TCP:ESTABLISHED

- + @@ -195,7 +195,7 @@ major_pagefault: Happens when the page needed is NOT in memory, the kernel

- + diff --git a/monitor/pmap.html b/monitor/pmap.html index ee5b2c4..c56b47e 100644 --- a/monitor/pmap.html +++ b/monitor/pmap.html @@ -81,7 +81,7 @@ diff --git a/monitor/pstack.html b/monitor/pstack.html index b3f96ce..8baf382 100644 --- a/monitor/pstack.html +++ b/monitor/pstack.html @@ -81,7 +81,7 @@ diff --git a/monitor/ss.html b/monitor/ss.html new file mode 100644 index 0000000..4497805 --- /dev/null +++ b/monitor/ss.html @@ -0,0 +1,246 @@ + + + + + + ss - Notes + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

+ +

+ + + + + + +

+ + + +

+ + + + +

+ + + + + + + + +

ss(8)

ss [option] [filter]
+

[option]
+  -p ..... Show process using socket
+  -l ..... Show sockets in listening state
+  -4/-6 .. Show IPv4/6 sockets
+  -x ..... Show unix sockets
+  -n ..... Show numeric ports (no resolve)
+  -O ..... Oneline output per socket
+

[filter]
+  dport/sport PORT .... Filter for destination/source port
+  dst/src ADDR ........ Filter for destination/source address
+
+  and/or .............. Logic operator
+  ==/!= ............... Comparison operator
+
+  (EXPR) .............. Group exprs
+

Examples

Show all tcp IPv4 sockets connecting to port 443:

ss -4 'dport 443'
+

Show all tcp IPv4 sockets that don't connect to port 443 or connect to address 1.2.3.4.

ss -4 'dport != 443 or dst 1.2.3.4'
+

+ +

+ + +

+ + + +

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + -- cgit v1.2.3

Resource analysis & monitor

Open connection to specific port

IPv4 TCP connections in ESTABLISHED state

IPv4 TCP connections in `ESTABLISHED` state