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[Linux Network Programming] Use GDB to debug programs and network programming gdb Linux has a powerful debugging tool, GDB (GNU Debugger), which can debug C and C ++ programs. The main functions of GDB are as follows: To use GDB, you must add the-g option (gcc-g xxx. c) to compile the program. When this option is set,
, the MAC address of the bond is unique to avoid the switch from confusing. This mode only provides fault tolerance, so the advantage of this algorithm is that it can provide high network connection availability, but its resource utilization is low, only one interface is working, in the case of N network interface, resource u
Tags: set IP physical completion linu related first step dev other interfaceThe first step is to set up IP-related information for Linux. Using Setup to enter the IP settings interface, select Device configuration IP in the following interface, in the settings IP interface use DHCP in the * Change to space, other IP normal configuration, must remember to configure DNS, or not on the Internet. Save after configuration is complete.The second step, open
One NIC can choose different IP according to the network environmentSometimes we encounter a situation where, when participating in a company project, the network environment does not have a DHCP service, the IP configuration must be specified manually, and when we go home from work, we must change the IP configuration in order to properly surf the internet. In fact, both Windows and
], srvaddr.sin_addr) fprintf (stderr, "Inet_pton error:%s\a\n", Strerror (errno)); Exit (1); } /* Client initiated connection request/* If Connect (sockfd, (struct sockaddr *) (AMP;SRVADDR), sizeof (struct sockaddr)) ==-1) { fprintf (stderr, "Connect error:%s\a\n", Strerror (errno)); Exit (1); } /* The connection was successful * * if ((Nbytes=read (sockfd,buf,1024)) ==-1) { fprintf (stderr, "read error:%s\n", Strerror (errno)); Exit (1); } Buf[nbytes]= ' "; printf ("Received data:
#!/usr/bin/env PythonImport timeImport SysIf Len (SYS.ARGV) > 1:INTERFACE = sys.argv[1]ElseINTERFACE = ' eth0 'STATS = []print ' Interface: ', InterfaceDef RX ():Ifstat = open ('/proc/net/dev '). ReadLines ()For interface in Ifstat:If INTERFACE in INTERFACE:Stat = float (Interface.split () [1])Stats[0:] = [stat]DEF TX ():Ifstat = open ('/proc/net/dev '). ReadLines ()For interface in Ifstat:If INTERFACE in INTERFACE:Stat = float (Interface.split () [9])Stats[1:] = [stat]print ' in Out 'Rx ()TX ()
Linux Network Monitoring Tool ss, network monitoring ss The ss command is used to display information about active sockets. Similar to netstat, but faster and more efficient than netstat. ss -h Usage: ss [OPTIONS] ss [OPTIONS] [FILTER]-h, -- help this message-V, -- version output version information-n, -- numeric don't resolve service names does not parse the se
Linux belongs to the network operating system, so the network function is the important core function of Linux. We know that the network model includes the total Linetype network, the Star net
Overviewthe kernel's PCI subsystem, or PCI layer, provides a number of common features for different devices to simplify various device drivers. The important structure of the PCI layer is as follows: pci_device_iddevice identification, based on the ID defined by the PCI flag, instead of Linux Local. Pci_deva net_device similar to a network device. Each PCI is assigned a Net_dev instance. Pci_driverinterfa
Tags: troubleshoot interface server decimal PROTOC cartoon/etc send control 1. Network Basics Network addressing IP Addressing Subnet mask Communication--mac address between the same network host Communication between different networks Routing Domain name Dns Basic
Linux network subsystem Kernel Analysis, linux subsystem Kernel Select route To send data packets to PC2, the linux system queries the route table to see that the 168.1.1.10 (Destination Address) gateway address is 192.168.1.1. In this case, the linux system selects Nic 1 to
Recently started to toss Linux, installed in this machine VMware and CentOS, after the installation of the virtual machine inside the OS can surf the internet, but use SECURECRT connect not on the virtual machine, start tossing this network. After the installation of VMware, will automatically add two network card (VMNET1 and Vmnet8), the middle card, the entire
Tags: CTO src network related RTT ack SMI bubuko BSP CommandPing[Email protected]/]#PingWww.baidu.comPING www.a.shifen.com (61.135.169.121) About( -) bytes of data. -Bytes from61.135.169.121: icmp_seq=1Ttl= - Time=71.7Ms -Bytes from61.135.169.121: icmp_seq=2Ttl= - Time=72.1Ms -Bytes from61.135.169.121: icmp_seq=3Ttl= - Time=133Ms -Bytes from61.135.169.121: icmp_seq=4Ttl= - Time=119Ms^C---www.a.shifen.comPingStatistics---4Packets Transmitted,4Recei
Unit 14th Linux Network principles and basic settingsThree types of network card mode diagramUse the Ifconfig command to maintain the networkfeatures of the ifconfig commandexamples of the use of IFCONFIG commandsTo start and stop a network card using the Ifup and Ifdown commandsfeatures of the IFUP commandfeatures of
RPS implementation is the goal. Of course, for this purpose, the kernel has to maintain a "flow table", which records the above three types of CPU information. This flow table is not really a tuple-based flow table, but a table that simply records the CPU information above.And my needs are different, I focus on data forwarding rather than local processing. So my focus is on:which CPU is interrupted by the network card that received the stream packet;
Through the Linux network programming-the original socket programming, we know that we can get the link layer packets through the raw sockets and recvfrom (), what is the link Layer Packet we receive ? Link Layer envelope formatMAC head (wired LAN)Note : CRC, PAD can be ignored when group packageOne of the scenarios of a link-layer packet:unsigned char msg[1024] = {//--------------group mac--------------0
1.Linux Configuring IP Address Ifconfig command temporarily configures IP addressIfconfig command, the most common function is to view the local network configuration status (of course, can also configure the network, but temporarily), directly enter the Ifconfig command can see all the network card informationIfconfi
cache. The native RPS implementation is the goal. Of course, for this purpose, the kernel has to maintain a "flow table", which records the above three types of CPU information. This flow table is not really a tuple-based flow table, but a table that simply records the CPU information above.And my needs are different, I focus on data forwarding rather than local processing. So my focus is on:which CPU is interrupted by the network card that received
Linux network settings (version 2) and linux Version 2Linux network settings-network configuration file and command network configuration file 1./etc/sysconfig/network-scripts/ifcfg-eth
} '| sh 1117 how to create multiple X (noclouds)Startx is the first X starting from display: 0.0 by default. Multiple X can be created by passing parameters to xserver:# Startx --: 1.0# Startx --: 2.0...Then switch with Ctrl-Alt-F7/f8. 1118 let a program continue running after logging out (noclouds, Chen Xu)# # DisownOrNohup command 1119 check the screen display information when Linux is started (Chen Xu)Run the dmesg command to view 1120 keep VI ale
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