check network throughput linux

heartbeat line is not allowed. Because the heartbeat line is connected to the network card to detect the server status, you should focus on viewing the network card status and configuration of each machine's heartbeat line connection. Check that the network card status is correct, nic lights are also on. Is the

\" or the name [0] is a space.Use your device as an Ethernet device. Ethernet devices have a uniform naming format, ethx. For EthernetThis special treatment is probably related to the history of Linux.The init method must be provided. register_netdev () will call this method to check the hardware and.Register_netdev () returns 0, indicating that the operation is successful. Otherwise, the operation fails. 2.4.8 sk_buffData transmission between differ

/usr/local/libexec/qemu-bridge-helper, usually without customization, with default values. Sndbuf=nbytes limits the send buffer size of the tap device to n bytes, which can be set when traffic is required for traffic control. The default value is "Sndbuf=0", which does not limit the size of the send buffer. Here again the following command launches the virtual machine: /usr/libexec/qemu-kvm-m 8096-cpu qemu64,+vmx-net nic,vlan=0,macaddr=52:54:00:12:34:01-net tap,vlan=0,ifname=tap0- SMP 4,socke

Linux Bond modeThrough multiple network card binding technology can not only increase the reliability of the server, but also increase the available network broadband, to provide users with uninterrupted network services;Seven types of bond modes:First mode:Mod=0, i.e.: (BALANCE-RR) round-robin policy (balanced Whirl c

addresses as other computers, you can gain the trust of other computers. 　　 Tunable Linux kernel network parameters 　　 ICMP-related kernel configuration parameters 　　 Overview: We usually use icmp packets to check whether other protocols (such as tcp and udp) on the target host are available. For example, an icmp packet containing "destination unreachable" is th

gateway three kinds of basic types. The firewall package provided by Linux is built into the Linux kernel and is a kind of firewall implementation technology based on packet filtering. The main idea is to control the flow of packets according to the source address, destination address and package type in the IP header of the network layer. A more thorough filter

group information for files.7.2.2 Changing the user/group to which the file belongsGrammar:Chown username file # change files belong to user chgrp groupname file # change files belong to groupThis has been introduced before, do not repeat.7.3 Other GroupsIn addition to the owner of the file and the user in the group, other users of the system are other groups of files.7.4 Changing the group to which the user belongsYou can change the group in which a user resides by using root administrativ

Linux Advanced Programming --BSD Socket of network programmingTenet: The learning of technology is limited and the spirit of sharing is limitless.a Fundamentals of network communicationTCP/IP Protocol Cluster Foundation: TCP/IP is a protocol cluster because TCP/IP includes TCP, IPS, UDP, ICMP, and many other protocols. is the OSI model and the TCP/IP model, TCP/

Linux server network configuration details 1. use the basic commands for Linux network configuration (1) use the ifconfia command to configure and view the network connection n. on the Linux console, enter/bin/ifconfig. the displa

/DHCPD. confDdns-Update-style interim;Allow booting; # define the ability to start PXEAllow BOOTP; # define support for BOOTPNext-server 192.168.0.1; # IP address of the TFTP ServerFilename "pxelinux.0"; # Bootstrap file (NBP)Default-lease-time 1800;Max-lease-time 7200;Ping-check true;Option domain-name-servers 192.168.0.1;Subnet 192.168.0.0 netmask 255.255.255.0{Range 192.168.0.128 192.168.0.220;Option routers 192.168.0.1;Option broadcast-address 192

Linux network security skills-network intrusion check The log file in the operating system is an important clue for detecting network intrusion. Of course, this assumes that your logfile is not damaged by the intruders, if you have a server that uses a leased line to connect

should know that Vmnet1 is a hostonly interface, and VMNET8 is a network interface that uses NAT. Here we don't want to use VMware's own DHCP nor do we want to use his NAT. So we just set the VMnet1. 2, we will use hostonly this network interface to connect the virtual machine and host, and then take advantage of the Windows xp/2000 with the Internet Connection Sharing (in fact, a simple route NAT) to allo

the subnet mask, Gateway is the next hop address, iface is the sending interface, and the U mark in flags indicates that the entry is valid (some entries can be disabled ), the G flag indicates that the next hop address of this route entry is the address of a vro, And the entry without the G flag indicates that the destination network address is a network directly connected to the local interface and does

By Sreekrishnan Venkateswaran Linux Bluetooth Bluetooth is a short-range wireless technology used to replace cables. It supports 723 kbps (asymmetric) and 432 kbps (symmetric) speeds to transmit data and voice. The transmission range of a Bluetooth device is about 10 meters (30 feet ). BlueZ is the official Linux Bluetooth Stack. It consists of the Host Control Interface (HCI) layer, Bluetooth Protocol co

in the embedded development, we often use a variety of Linux commands, today and everyone to share is the basic Linux Network command, which is inadvertently seen on the internet in a well-organized article, to share to everyone, I hope to help everyone. The most important and basic Linux

?Temporary shutdown Selinux:setenforce 0Permanently shut down, edit/etc/selinux/config change selinux=enforcing to selinux=disabled and restart Linux10. How do I temporarily configure my host name? And how do you get it to restart and still take effect?If you want to change the hostname to "aming.com", you need to do thisHostname aming.comTo take effect after reboot, you need to modify the configuration file/etc/sysconfig/network to hostname=aming.com

Linux Enquiry IPNote:(1) lo--local Loppback (the callback of this machine, Windows cannot pass this connection, this is the network card is not configured IP,ifconfig can configure IP).(2) If only lo does not appear eth0, you can do this by doing the following: Double-click the Network button in the lower right corner-networkadaptorNetwork AdaptorBridging-The vir

(excluding Wi-Fi NICS), including Tx/RX, checksumming, and wake-on-LAN Settings. The following are some useful commands: Display the driver information of a network adapter, which is suitable for querying software compatibility: Ethtool-I Display network data: Ethtool-S Set the adapter connection speed (mbps) Ethtool speed Detailed introduction: ethtool for Linux