Socket Statistics

ss是Socket Statistics的缩写。

netstat tips

1, netstat some of the commonly used options

netstat-s option to the various agreements were displayed according to their statistics.

netstat-e This option is used to display statistics on the Ethernet.

netstat-r This option displays information on the routing table.

netstat-a This option displays a list of all the valid connection information, including the connection has been established and the monitoring connection requests LISTENING ESTABLISHED connection.

netstat-n shows all connections established and effective

Show local listening TCP/UDP ports, and the process they belong to:

netstat -tulpn

它利用到了TCP协议栈中tcp_diag。tcp_diag是一个用于分析统计的模块，可以获得Linux
内核中第一手的信息，这就确保了ss的快捷高效。当然，如果你的系统中没有tcp_diag，ss也可以正常运行，只是效率会变得稍慢。（但仍然比 netstat要快。）

netstat命令是net-tools工具集中的一员
而ss
4000
命令是iproute工具集中的一员：

yum
install
iproute
iproute-doc