Netstat command explanation

Function: Print the status information of network system in Linux, know the network condition of Linux system

Options:

-A shows all sockets in the connection -a lists the relevant addresses in the network type line- C continuously lists the network status - C display router configuration's cache information - E Display network Other related information - G display multi-group list - L Display monitor server socket - n Direct use IP address, not through the domain name server - n Display symbolic link names for network hardware peripherals- p displays the program ID and program name of the socket you are using - t Displays the connection status of the TCP transport protocol - u shows the connection status of the UDP transport protocol - x--unix

Instance:

* List all ports (including listening and not listening) netstat-a List all ports netstat-at List all TCP ports netstat-au List all UDP ports * List all sockets out of listening status Netstat-l only monitor ports are displayed netstat-lt list only all listening TCP ports netstat-lu lists only all UDP ports that are listening NETSTAT-LX only lists all listening Unix ports * Show statistics for each protocol netstat-s displaying statistics for all ports netstat-st displaying statistics for TCP ports Netstat-su displaying statistics for UDP ports * PID and process names are displayed in the Netstat output netstat-pt * hosts, ports and usernames (host, port or user) are not displayed in the Netstat output Netstat-an netstat-a--numeric-ports/hosts/users * Continuous output netstat information netstat-c #每一秒输出网络信息 * Display of address families not supported by the system (addr families) netstat--verbose netstat:no support for ' AF IPX ' on the This system. netstat:no support for ' AF AX25 ' on the This system. netstat:no support for ' AF X25 ' on the This system. netstat:no support for ' AF Netrom ' on the This system. * Show Core routing information netstat-r/Route-n * Display Network interface list netstat-i Iface MTU Met rx-ok rx-err rx-drp rx-ovr tx-ok tx-err tx-drp tx-ovr FLG eth0 0 412469225 0 0 0 374093441 0 0 0 Bmru Lo 16436 0 1417 0 0 0 1417 0 0 0 LRU netstat-ie/ifconfig-a *ip and TCP analysis view the IP addresses that link the most ports on a server Netstat-ntu | grep:80 | awk ' {print $} ' | cut-d:-f1 | awk ' {++ip[$1]} END {for (i-in IP) print ip[i], "\ t", i} ' | so Rt-nr 4 172.16.5.177 4 172.16.5.143 3 172.20.44.23 2 172.16.5.163 2 172.16.5.140 2 172.16.210.133 1 172.20.99.2 *tcp various status lists netstat-nt | grep-e 127.0.0.1-e 0.0.0.0-e:::-v | awk '/^tcp/{++state[$NF]} END {for (I-in state) print I, "\ T", St Ate[i]} ' time_wait 4 close_wait 1 established * View the number of phpcgi processes, if close to the preset value, the description is not enough. Netstat-anpo | grep "php-cgi" |wc-l (Root view) Netstat-anpo | grep "UNIX" |wc-l
-

Netstat command explanation