Linux

Recently, When I deployed the development environment and used the ssh-keygen command to set up SSH password-free login, it did not work. Later, I found that ~ /. Ssh directory and ~ /. Ssh/authorized_keys: Only the user can have the write

Download Software: jsoncpp-src-0.5.0.tar.gz scons-2.1.0.tar.gz # Tar zxvf scons-2.1.0.tar.gz# Tar zxvf jsoncpp-src-0.5.0.tar.gz Set the environment variable [Key], absolute path# Export myscons = decompressed path# Export scons_lib_dir = $ myscons/

Struct buffer_head {Char * B _data;/* pointer to data block (1024 bytes )*/Unsigned long B _blocknr;/* block number */Unsigned short B _dev;/* Device (0 = Free )*/Unsigned char B _uptodate;Unsigned char B _dirt;/* 0-clean, 1-dirty */Unsigned char B _

I am not familiar with the SMP system problems during multi-processor operations. Well. First, each CPU in the SMP system has an idle process. The system must pay attention to the changes of each CPU during process switching. Task_struct has two

Suppose we want to modify the NIC name mybridge The implementation steps are as follows:1. # Vim/etc/modprobe. conf Find alias eth0 vmxnetChange eth0 to the name of the ENI you want. Example: Alias mybridge vmxnet 2. modify the configuration file#

This article describes the components of VMWare Infrastructure and the installation of VMware ESX Server on 64-bit Linux virtual machines. DB2Enterprise 9. 　　Introduction You have to install DB2 9 on a virtual machine for many reasons. For example,

Let's start with a hypothetical scenario, assuming that we want to use RSA Authentication to allow a local Linux workstation (localbox) to open a remote shell on remotebox, remotebox is a machine of our ISP. At this moment, when we try to connect to

Linux Operating Method on the I/O port: 1) directly use the I/O port to operate the Function 1. Apply for the I/O port area when the device is enabled or the driver module is loaded; Request_region (); 2. Then use functions such as INB () and outb ()

The Select system call enables our program to monitor the State Changes of multiple file handles (file descriptor. The program stops at select and waits until one or more of the monitored file handles change their status. There are a lot of files in

Http://hi.baidu.com/bzyy_2008/blog/item/bf8347221048cd5493580774.html The first time I compiled the kernel, I found a tutorial on the network ~ So I tried to compile the kernel with a playful mind .... I don't expect to be able to compile many small

From: http://www.2cto.com/ OS /201203/124813.html You can use split and cat to cut merged files in Linux. The following are some examples.1. There are two file cutting modes: the binary mode of text files. 1.1 The text mode is only applicable to

I2C is a peripheral bus proposed by Philips. i2C only has two lines, one serial data line: SDA, and the other clock line, and the other is the SCL. this facilitates the cabling of engineers. in addition, I2C is a multi-host control bus. it is

Learn concurrency and competition today 1. Concurrency and ManagementThe competition is usually generated as a result of shared access to resources. When designing your own driver, the first rule to be remembered is to avoid sharing resources

2.6 The source code tree directory of the kernel generally contains two texts: kconfig and makefile. Kconfig distributed in various directories forms a distributed Kernel configuration database. Each kconfig describes the Kernel configuration menus

We have previously analyzed that in Linux memory management, the kernel uses 3 GB-> 4 GB address space, with a total size of 1 GB. In addition, some physical mappings (vmalloc) are used for non-contiguous spaces. Apart from this space, only m size

Everyone on Earth knows that LDD is a classic book, but he has never had time to read it (which seems to be an excuse). Now he wants to stick to it. God bless me! To view the print information of the kernel, run the following statement: Echo 8>/proc/

ARM-based Linux Startup Analysis ReportAbstract: This paper mainly analyzes the ARM-based Linux-2.2.26 kernel startup process. First from/Start with arch/ARM/makefile, introduce three different startup schemes, and then analyze the typical

Waiting queue in Linux kernel-init_waitqueue_head, etc. Waiting queue in Linux Kernel      LinuxThe kernel wait queue is based on the double-loop linked list and is closely integrated with the process scheduling mechanism to implement the core

Reprinted from:

  Start Step 1 -- load BIOS When you turn on the computer power, the computer will first load the BIOS information, BIOS information is so important that the computer must find it at the very beginning. This is because the BIOS contains CPU