db25 loopback

Grub. cfg: set timeout=1set default=0menuentry "ArchLinux-2012.01-1-archboot.iso" { set isofile="/boot/iso/archlinux-2012.01-1-archboot.iso" loopback loop $isofile linux (loop)/boot/vm64 ro initrd (loop)/boot/initrd64.img}# see GRUB2 - ArchWiki [via]menuentry "ArchLinux-2011.08.19-core-x86_64.iso" { set isofile="/boot/iso/archlinux-2011.08.19-core-x86_64.iso" set dev_label="MULTIBOOT" loopback loop $isofile

RedHat6.5 Nic problem summary Problem description: Prepare to use RedHat6.5 to install Oracle 12c RAC. After the system environment is ready, find that the configuration of the new RedHat Nic is not the same as before. The problem and solution are summarized as follows: 1. The eth0 file cannot be found. In the use of RedHat6.5, the new installed system, found that no eth0 Nic, the default first Nic is the Auto-eth0 [Root @ rac01 ~] # Cat/etc/sysconfig/network-scripts/ifcfg-Auto_eth0 TYPE = Ether

machines;1. Simulate the creation of a virtual machine disk device and build a local loopback file: Create Virtual Disk storage directory: # MKDIR/XEN/IMAGES-PV Enter directory to create virtual machine disk device: # cd/xen/images/ # dd If=/dev/zero of=./ Busybox.img bs=1m oflag=direct seek=2047 count=1 View device size, you can find the actual size is 1MB: # ll-h Total 1.0M -rw-r--r--1 Root root 2.0G Feb 6 20:15 busybox.img 2). format

replace-> the Replace command. When we look at the code we wrote two weeks ago, it's often like we saw it for the first time, so it's necessary to have a name that helps us understand its meaning.2, even if you do not use visual Studio. NET programming, using code support files also helps improve application performance In all asp.net Web projects, such as Web applications, Web services, or Web controls, Visual Studio. NET uses code support files. The code support file makes the project better

simulation terminal. Usually HyperTerminal software is used in Windows OS. Connect the PC to the vro: 1. Configure terminal simulation software parameters. 2. Connect one end of the rolover cable to the control port of the router. 3. Connect one end of the rolover cable to the conversion adapter from the RJ-45 to the DB-9. 4. Connect the other end of the DB-9 adapter to the PC. When we configure a cisco router for the first time, we need to configure the console port from the Cisco router

the famous Free Software GNU, and has been optimized and strictly tested. Debugger: source code-level debugging. It provides two debugging methods: graphical and Command Line Debugging, including breakpoint settings, single-step execution, and Exception Handling. You can view and modify memory, registers, and variables, you can view function stacks and perform disassembly. Debugging device: Embest JTAG simulator. One end is a DB25 interface, connecte

independently, and cannot be connected to other analyzer master or connection types). The main analyzer cannot be connected to other master or independent analyzer, however, it can be connected to a maximum of nine connector analyzers. The connector analyzers are mainly used to expand the connection capabilities of the master analyzer, and the connection cable length cannot exceed 15 meters. Both stand-alone and master analyzer are connected to the database through 10BASE-T Ethernet and TCP/IP

height is 1U or 6U. 2. analyzer with 1U height can monitor 240 ports 3. The analyzer with a standard 6U height can monitor 480 ports. You can monitor up to 1920 ports by adding an expansion card (six expansion slots in the analyzer ). 4. Each expansion card in the 6U height analyzer can monitor 240 ports Department-level Analyzer 1. analyzer provides 128 monitoring ports through the DB25 connector and a RJ-45 Connector 2. provide two continuous outpu

The Cisco Router performs very well in the market. Here we will mainly focus on Cisco routers and explain in detail the detailed steps of Cisco router configuration. Cisco routers are the core devices for network communication, currently, it has been widely used. I will introduce my experience in practice as follows. Control port interface practices and connections Connect one end of the control cable RJ45 in the Cisco2500/1000 series router accessories to the Cisco CONSOLE port, and the Cisco70

RS-232, RS-422 and RS-485 standards only to interface electrical characteristics to make provisions, and does not involve connectors, cables or protocols, on this basis, users can establish their own high-level communication protocols. The most frequently used plug-ins we encounter in our actual work have three DB9 DB25 RJ45 plug-ins. The above three plug-ins can be used as serial port plug-ins, you can also switch between sockets through cables. Nex

Currently, the commonly used serial ports include 9-pin serial ports (DB9) and 25-pin serial ports (db25). When the communication distance is close ( The connector can be divided into the public header and the mother header: The public header generic pointer connector; the mother header generic finger socket connector. There are unified rules on the pins of all connectors, and the serial numbers are printed on the connectors. Check the serial numbers

Original address: http://www.cnblogs.com/feisky/archive/2009/10/23/1588771.html Linux operating system from the beginning of the serial port provides a good support, this article on Linux under the serial port communication programming simple introduction. Introduction of Serial portSerial port is a kind of common interface of computer, with few connecting lines, simple communication and wide use. The common serial port is the Rs-232-c interface (also known as EIA Rs-232-c), which w

First blog, the first record of the one weeks of learning content.The first of the UART learning path is the introduction of the basic concept of the UART. Follow-up will use stm32f407 serial port and PC communication. Finally, Verilog HDL is used to write the serial transmitting module and receiving module, complete the simulation and complete the communication on the Zedboard board.First clarify what is uart,com mouth, ttl,rs-232.The universal Asynchronous transceiver transmitter (Universal as

-Sub connectors ): Various shell sizes: DA, DB, DC, DD, And DE. Contact Count: 9, 15, 25, 37, and 50 Contact Count HD: 15, 26, 44, 62, 78 and 104 Power Supply: 3W3, 3WK3, 5W5, 8W8, and 3, 5, 8 single-row high-capacity power contacts Type: Board Mount (Right Angle, Through-Hole, Surface Mount, Dual Port, Press-fit, Wire Wrap), Cable (IDC, Crimp Snap-in, Solder Cup) D-Sub connector terminology: HD: High Density, 3 rows of feet in 2 rows of shell, such as 15PIN in 9PIN Shell Filtered: EMI or RF

-pin db25 connector, specify the signal content of each pin of the connector and the level of each signal. (1) The signal content of the interface is actually 25 of the RS-232-C lead many are rarely used, in the computer and terminal communication generally only use 3-9 lead. The signal content of the nine most commonly used RS-232-C leads is shown in Table 1 (2) Electrical Characteristics of the interface in the RS-232-C, the voltage of any signal li

1 control port connectionFirst, connect one end of the control cable RJ45 in the cisco2500/1000 series router accessories to the Cisco conOn the sole port, the ciso7000/4000 series router connects one end of the db25 of the modem cable to the COn the onsole port, one end of DB9 is connected to COM1/2 of the PC.Set the simulation terminal program on the PC: for example, use the terminal program in windows, use COM1/2,9600 BPS, 8Data bit, 2 stopBit. Oth

switch, such as the switch only has the fiber port, and the routing device provides the RJ-45 port or AuI port, the connection between the two can be achieved only through the SC-to-RJ-45 or SC-to-AuI transceiver. The twisted pair jumper between the transceiver and the switch must also use a straight line. However, it is rare that a vswitch is a pure fiber interface. Figure 11 2. connection between a router and an Internet access device The main applications of routers are Internet connections

is, one-bit and one-bit transmission. We often say that the serial port refers to the RS-232C interface, which was in 1970 by the American Electronics Industry Association (EIA) the serial communication standard jointly developed by Bell systems, modem manufacturers, and computer terminal manufacturers. Its full name is "Technical Standard for Serial Binary data exchange interfaces between data terminal devices (DTE) and data communication devices (DCE ". The traditional RS-232-C interface stan

2005/09/28 3Com SuperStack II Switch 3300 Configuration: Prepare a data line to connect the vswitch and PC Use Windows accessories-communication-Super Terminal Power on the switch Press the enter keys on the Super Terminal. The logon prompt is displayed. Enter the default username/password: admin/(no password) After setting the IP address, you can configure the vswitch in Web mode. You can use transcend network supervisor to find the vswitch with the IP address set. The cable for Cisco 2

the most commonly used serial communication interfaces at present. It was established in 1970 by the United States Electronics Association (EIA) Joint Bell System, modem manufacturers and computer terminal manufacturers to develop a standard for serial communications. Its full name is "the technical standard for serial binary data interchange interfaces between data terminal equipment (DTE) and Data communication devices (DCE)" which provides for the adoption of a 25-foot