包含标签 ss articles

ss -p输出users项详解

 | Linux/unix/mac
使用iproute2 工具包里的ss 进行查看，发现在输出的users项里会出现三个参数，第一个是进程名、第二个为pid，第三项代码什么意思呢？输出示例如下： 1[root@361way ~]# ss -lp|column -t 2State Recv-Q Send-Q Local Address:Port Peer Address:Port 3LISTEN 0 128 *:ssh *:* users:(("sshd",11155,3)) 4LISTEN 0 128 *:cslistener *:* users:(("hhvm",6925,17)) 5LISTEN 0 20 *:mysql *:* users:(("mysqld",27967,10)) 6LISTEN 0 128 *:http *:* users:(("nginx",20211,9),("nginx",20212,9),("nginx",26283,9)) 由于网上未到准确的答复，通过查看其源代码 ，在iprou……

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lsof -i与ss、netstat

 | Linux/unix/mac
现网使用的teastore主机，经业务侧同事反馈通过lsof -i:port进行查看时，耗时非常长，需要支撑定位解决。问题不算是大问题，这里想把lsof 、netstat、ss三个指令串一下，三个指令都可以查看具体某个端口是由什么进程引用。 一、查看所有监听端口信息 三个指令可以通过以下……

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SS Utility: Quick Intro

 | Linux/unix/mac
1. Why? /procinterface is inadequate, unfortunately.When amount of sockets is enough large,netstator even plaincat /proc/net/tcp/cause nothing but pains and curses.In linux-2.4 the desease became worse: even if amountof sockets is small reading/proc/net/tcp/is slow enough. This utility presents a new approach, which is supposed to scale well. I am not going to describe technical details here and will concentrate on description of the command. The only important thing to say is that it is not so bad idea to load moduletcp_diag, which can be found in directoryModulesofiproute2. If you do not make thissswill work, but it falls back to/procand becomes slow likenetstat, well, a bit faster yet (see section “Some numbers”). 2. Old news In the simplest formssis equivalent to netstat with some small deviations. 1ss -t -adumps all TCP sockets 2ss -u -adumps all UDP sockets 3ss -w -adumps all RAW sockets 4ss -x -adumps all UNIX sockets Option-oshows TCP timers state.……

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Linux网络状态工具ss命令使用详解

 | Linux/unix/mac
ss命令用于显示socket状态. 他可以显示PACKET sockets, TCP sockets, UDP sockets, DCCP sockets, RAW sockets, Unix domain sockets等等统计. 它比其他工具展示等多tcp和state信息. 它是一个非常实用、快速、有效的跟踪IP连接和sockets的新工具.SS命令可以提供如下信息： 所有的TCP sockets 所有的UDP sockets 所有ssh/……

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