linux network utilization

In Linux, the Ethernet interface is named: Eth0,eth1, and so on. 0, 1 represents the NIC number.To view the network card information, you can use the Ifconfig commandIfconfig-a View All interfacesIfconfig eth0 Viewing specific interfacesTo turn the NIC on and off:Ifup eth0 turn on the NIC Eth0Ifdown eth0 Turn off the NIC Eth0The NIC is not visible in ifconfig after it is closedThe Setup command can be used

Linux network speed-up guide Level: Entry Chris Walden (cmwalden-at-us.ibm.com)E-commerce architect, IBM Developer RelationsJanuary 2004 IBM e-commerce architect Chris Walden willDeveloperworksThe nine articles published in this article will guide you how to use your Windows Operating Skills in Linux. This section will discuss the

There are many open-source network monitoring tools for Linux operating systems on the Internet. for example, you can use the iftop command to check the bandwidth usage. netstat is used to view the interface Statistics Report, as well as the current processes of the top monitoring system. however, if you want to find a tool that can calculate network bandwidth

27.3 "Linux learning is not difficult" Linux Network Command (3): ping command to test connectivity to the target computerUse the ping command to test connectivity to the target computer. The ping command uses the ICMP transport protocol to emit information that requires a response, and if the remote host has no problem with the

Linux operations-related command rollup GitHub address: Https://github.com/zhwj184/shell-work Copy Code code as follows: #/bin/sh #查看http请求的header Tcpdump-s 1024-l-a-n Host 192.168.9.56 Tcpdump-s 1024-l-A src 192.168.9.56 or DST 192.168.9.56 sudo tcpdump-a-S 1492 DST Port 80 #本地网络中IP地址为192.168.0.5 host is now communicating with the outside world sudo tcpdump-i eth0 src host 192.168.0.5 #查看网卡eth0的http请求的tcp包 Tcpdump-i eth0 Port htt

Set the host name and domain name of the Linux host /etc/hosts Example 127.0.0.1 localhost.localdomain localhost In general, the content of hosts in the host name (hostname) of the definition, each behavior of a host, each row consists of three parts, each part by a space separated. The lines at the beginning of the # number are described and are not interpreted by the system. The first part: Network IP a

Linux Network Management (i)First, Ifconfig commandThe Ifconfig command can display the NIC and IP parameters, which is a more important command in CENTOS6.Examples of Use:1, network card stop and network card start Ifdown (NIC name)Ifup (NIC name) Note the Ifdown command can no longer be used alone in the Xshe

Linux basic network construction experiment, linux Basic ConstructionI. Lab Objectives Use three virtual machines to build two host-only networks: vmnet2 and vmnet3. Ii. experiment environment Intranet Internet Gateway IP 192.168.0.10/24 202.3.4.10/24 Eth0: 192.168.0.254/24Eth1: 202.3.4.254/24 GW 192.168.0.254 2

NIC configuration: Vi/etc/sysconfig/network-scripts/ifcfg-eth0device=eth0Hwaddr=00:0c:29:d4:a4:b1Type=ethernetUuid=45744d6c-8ec4-4c68-9342-384515579b07onboot= "Yes"Nm_controlled=yesbootproto= "Static"Ipaddr= "192.168.1.120"Gateway= "192.168.1.1" netmask= "255.255.255.0" # # #启用/sbin/ifdown eth0/sbin/ifup eth0service netword restart Firewall chkconfig iptables on|off/etc/selinux/config Disable # # # # # # # # # # # # # # # # 1, edit/etc/udev/rules.d/70

Linux Security Basics: network configuration commands and linux basic configuration commands 1. ifconfig view and configure network interface information(1) set an IP addressIfconfig eth0 192.168.0.1(2) temporarily disable or enable the NICIfconfig eth0 downIfconfig eth0 up(3) set the subnet maskIfconfig eth0 netmask 2

@turbogears@web-server@web-servlet@work Station-policycertmongerdevice-mapper-persistent-datakrb5-workstationoddjobpam_ Krb5paxperl-cgiperl-dbd-sqlitesamba-winbindsgpio%end[[emailprotected]pxelinux.cfg]#cp/root/anaconda-ks.cfg/var/www/html/ks.cfg[[ Emailprotected]pxelinux.cfg]#chmod+r/var/www/html/ks.cfg[[emailprotected] pxelinux.cfg]#vim/var/lib/tftpboot/pxelinux.cfg/defaultdefaultvesamenu.c32# prompt1timeout600displayboot.msgmenubackgroundsplash.jpgmenutitle welcometocentos6.5!menucolorborder0

Network Communication commands (relatively simple ): 1. write/usr/bin/write Write [user name] Used to send information to a user, provided that the user has logged on to the server host Otherwise, there is no way to leave a message for him. Therefore, write is a real-time communication tool. End the communication with Ctrl + D E.g. write guest 2. wall [write all]/usr/bin/wall Used to broadcast information to all users Wall [message] [file name] 3. pin

The main advantage of computer network is that it can realize the sharing of resources and information, and users can access information remotely. Linux provides a powerful set of network commands to serve users, which can help users log on to remote computers, transfer files, and execute remote commands. This chapter describes the following common commands for

Statistics on high-speed network traffic and Linux traffic in linuxNetpps. sh counts the data volume per second, including receiving (RX) or sending (TX) Netpps. sh eth0#! /Bin/bashINTERVAL = "1" # update interval in secondsif [-z "$1"]; then echo usage: $0 [network-interface] echo e.g. $0 eth0 echo shows packets-per-second exitfiIF = $1 while truedo R1 = 'cat/sy

/tcp_max_syn_backlog The maximum number that can be saved in the queue for connection requests that have not yet been confirmed by the other. If the server is overloaded frequently, try increasing this number. 2048 2048 /proc/sys/net/ipv4/tcp_low_latency This option should be disabled if the TCP/IP stack is allowed to accommodate low latency under high throughput conditions. 0 /proc/sys/net/ipv4/tcp_westwood Enables the sender-side

Linux has a lot of "virtual network cards" in the driver. Earlier articles once detailed analysis of TUN,IFB and other virtual network cards, similar ideas, in the virtualization of the trend of the big line, the Linux source tree in the growing "network virtualization" supp

Linux-Network C Programming epoll function, linux-cepoll As mentioned above, epoll is equivalent to a mobile phone if take-out is taken from different places of 100. When the take-out arrives, the deliveryman can notify you so that each take-out can go a lot less. How does it implement these functions? Epoll Functions Epoll is a strong version of select/poll. It

BSD Socket Network Programming API creates socket objectint socket (int __domain, int __type, int __protocol) : Successfully returns the socket file descriptor, failure returns-1.Parameter 1:socket the address cluster or protocol family used by the objectCommonly used are pf_local (native communication), Pf_inet (IPV4 protocol cluster), PF_INET6 (IPV6 protocol cluster)The type of the parameter 2:socket. Common: connection-oriented data flow mode; Non-

can be purchased from the American Pci-sig Association.Common PCI cards include network cards, sound cards, modems, TV cards, and hard disk controllers, as well as ports such as USB and serial ports. The original card is usually a PCI device, but soon its bandwidth is not enough to support the performance of the graphics card. PCI graphics cards are now used only when there are no AGP and PCI Express slots on the external monitor or motherboard that

the syntax in the following format:Traceroute website(9) NetstatThe netstat command is used to display network-related information , where the path is/bin/netstat, with the syntax in the following format:netstat [options]where the-t option represents the TCP protocol, the-U option represents the UDP protocol,-L for listening,-R for routing, and-n for displaying the IP address and port number .such as: view the local listening port-----netstat-tlunVie