Elimination: Check whether the server system works normally; whether the server is down; whether the modem works normally; and whether the local server works normally.7. fault: no client can access the Internet except the server in the LAN of the Internet cafe.Analysis and troubleshooting: Check whether the HUB or vswitch works normally. Check whether the network part (including Nic, network cable, connector, and network configuration) of the server
Atz soft reset modem.At K0 disable traffic control.At K3 uses the RTS/CTS stream control.At W0 saves the current settings to the factory settings configuration file 0 written to the permanent storage of the modem.At y0: When the modem is powered on, it automatically calls factory settings 0. This ensures that the preset parameters are restored each time the modem is powered on.Atdn dialing, where N is t
Iv. Modem Problems
I feel that the example of Bridge pattern in Agile Software Development-principles, models and practices is good. (The encapsulation of changes in chapter 33 of Java and patterns is also well written and recommended.Everyone reads it. It elaborates on design to interfaces in design patterns explained.2) favor composition over inheritance. 3) Find What varies andEncapsulate it .).
There are a large number of
Article Title: Simple Network check (2 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
2. confirm that there are no problems with the online devices such as the network line, hub, modem, and so on:
Hardware:
After you have completed the network card check (please confirm that the network card can really work
Elimination: Check whether the server system works normally; whether the server is down; whether the modem works normally; and whether the local server works normally.
7. fault: no client can access the Internet except the server in the LAN of the Internet cafe.
Analysis and troubleshooting: Check whether the HUB or vswitch works normally. Check whether the network part of the server connected to the HUB or vswitch includes Nic, network cable, connec
There are two common ways of Internet access through ADSL: server sharing and router sharing. If you don't want to waste a computer as a server, you can check whether your ADSL Modem has the routing function (the instructions are provided ), if the ADSL Modem with the routing function is used, the Modem itself can be used as a host. Let's take a look at the speci
Diagnosis Technology
1. the physical layer and its diagnostic physical layer are the most basic layers in the OSI layered structure system. Based on the communication media, the physical interfaces of the system and the communication media are implemented to transparently transmit data link entities, provides services to establish, maintain, and remove physical connections between computers and networks. Physical Layer faults mainly occur when the physical connection mode of the device is corre
RAM: 128 MB
HD: 10 GB IDE
FD: 1.44 MB
CD-ROM: 8 x DVD
MODEM: Lucent Winmodem v.90
LANCard: car000010/100 Fast Ethernet Adapter II
SoundCard: ESS Technology | ES1978 Maestro 2E
VideoCard: Trident Cyber9525xDVD 2 MB RAM
PCMCIA: Type II x2
It is difficult to install a Linux system on a laptop, because most of its hardware support is poor. Fortunately, my hardware is supported (but the problem persists ). Desktop problems, especially self-collected is
. In this example. All of the files are root, the group that belongs to is root, and the file access permission is drwxr-xr-x. For files and folders, each file and folder has a set of permission flags that are combined with them, and in the example above, the contents of the first domain. To analyze the meaning of each symbol in this field in detail:The field is made up of 10 characters. Be able to divide them into four groups, with the detailed meanings of each:D rwx R-x R-xFile type All rights
characters, which can be divided into four groups, with the following meanings:D rwx R-x R-xFile type Owner permission Flag Group permission flag other user rights flagwhichFile type: first character. Since the Linux system treats devices, directories, and files as files, this character indicates the type of the file, and the meaning of the character corresponds to the following table:
file type
example
-
Normal file
Data files,ASCI
When using an embedded development Board running a Linux system (example imx6 Saber Lite), important commands are often used, such as viewing the system version of the brush into the development Board, the CPU of the Development Board, the various external devices that the Development Board inserts (such as the USB wifi,3g MODEM, SATA hard drive ..... ), the memory footprint.
System
# uname-a #查看内核/operating system/CPU information
# head-n 1/etc/issue
Small Business office network using ADSL sharing internet economic benefits. Upgrading the ADSL modem is a highly technical work. If you are careless, you may be able to cause the device to not work properly, so please think twice before you do it!
The common practice is to use a hub with Proxy server software, using a computer as a proxy server, other computers through this agent sharing ADSL Internet. But this way of sharing the Internet, with the
/dev/lp[0-3]: and the mouth
/dev/console: Console
/dev/fb[0-31]:framebuffer
/dev/cdrom =>/DEV/HDC
/dev/modem =>/dev/ttys[0-9]
/dev/pilot =>/dev/ttys[0-9]
/dev/random: Random number device
/dev/urandom: Random number device
In a Linux system, the/dev directory is used to hold device files. Each file points to a system device. The user's program can use these device files,
operate on devices that are real hardware. For example:
32-bit I/O and DMA in Linux are disabled by default, but the hard disks on the computer are not that outdated! Linux is good, but if you use 16-bit I/O, your computer's performance will not be fully utilized! It doesn't matter. Come with me.
To enable 32-bit I/O and DMA, you must set it as root. To reduce the damage to the file system caused by system restart due to an error, it is best to use the single-user mode. You can use the following command to check the I/O of the hardware drive.
# Hdpar
One, DF command; DF is from the Coreutils software package, the system is installed, it comes with, we can use this command to see the disk usage and the location of the file system is mounted; Example: [Email protected] beinan]# DF-LH Filesystem capacity used% mount point available /dev/hda8 11G 6.0G 4.4G 58%/ /dev/shm 236M 0 236M 0%/dev/shm /DEV/SDA1 56G 22G 35G 39%/mnt/sda1 As we can see, the system is installed in/dev/hda8, and a 56G disk partition/dev/sda1 mounted in/mnt/sda1; Other paramet
use of cable modem technology to realize the "triple net integration" based on the original CATV network, and to build a unified The network can carry a variety of service types, flexible user interface and wide spectrum of access bandwidth from narrowband to broadband, and take advantage of the existing equipment and unique advantages of CATV network, by providing high speed Internet access method and appropriately developing local service in accord
All vro users have encountered vro configuration faults. Here we mainly introduce how to completely solve vro configuration faults. In the case of connectivity problems in the serial port, in order to eliminate the serial port faults, generally, the show interface serial command is used to analyze its screen output report content and locate the problem. The start of the serial port report provides the interface status and line protocol status. Possible Combinations of interfaces and line protoco
Details of several common troubleshooting methods for routers, and details of several troubleshooting methods1. Serial Port troubleshooting
When a connectivity problem occurs in the serial port, in order to eliminate the serial port fault, the show interface serial command is generally used to analyze its screen output report content and locate the problem. The start of the serial port report provides the interface status and line protocol status. Possible Combinations of interfaces and line pro
Z500 dual-core CPU,CPU speed is 800MHz, memory space 512MB, hard disk space 8GB, the screen is 4.3 inches, the resolution of up to 800x480 pixels, is a no-compromise netbook [2]. However, the VCP08 battery can only support 2 hours of computer operation [1].Word, VCP08 equivalent to a MTK Feature Phone on an XP computer.Figure 8.3 faked picture, a laptop bundled a MTK phone.Courtesy Http://farm3.static.flickr.com/2735/4308553311_a01df766d6_o.pngIs it possible to make a computer phone, that is, a
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.