Linux

Implementation of IP protocol (V4) in Linux (1)First, let's look at some Validation-related structures: 1 net_device structure: Contains a features domain, which indicates some features of the device (such as control Verification). The following

# Include # Include Int get_self_path (char * Buf, int buf_len) {Int ret = readlink ("/proc/self/EXE", Buf, buf_len );If (-1 = RET) goto fail_exit;If (Ret> = buf_len) goto fail_exit;   /* Readlink only copies the content of the soft link

Introduction Research on LFS (Linux from scratch)For a while, I found that some problems, such as tutorials on the official website and analysis articles by some third parties, have one thing in common. The details are too detailed. Too practical

# Include #include #include using namespace STD; # define alphabet_num 256 typedef Enum {enum_path, enum_data} enumtype; char FSM [9] [alphabet_num]; void initfsm () {memset (FSM [0], 0, alphabet_num); // initial state memset (FSM [1], 1,

Everything has a reason. Let's start with this problem ~~~ q: There is a main execution program, which implements the function Foo () and calls the dynamic library LIBA. so function bar (), and dynamic library LIBA. so also implements the Foo ()

For an operating system, the two most important modules are file system and process management. In Linux, files have a wide range of meanings. All information that can be generated or consumed is files. In addition to its ext2 file system, Linux

/Documentation/x86/x86_64/mm.txt Virtual Memory Map with 4 level page tables: 0000000000000000-00007 fffffffff (= 47 bits) user space, different per mmHole caused by [48: 63] sign extensionFfff800000000000-ffff80ffffffff (= 40 BITs) Guard holeFfff88

Step by step to build an embedded Linux system platform --   Let's take a look at some of the articles I wrote earlier... In order to meet the requirements of the embedded system operating platform in terms of performance, cost, and reliability,

Recently, a Linux MQ server frequently experiences Abnormal Termination of the queue manager. Check the mqlog to learn that the MQ key process is terminated abnormally, and view the information in/var/log/messgaes, the MQ process is killed by

Fork is the meaning of fork in English. In fork, take the meaning behind it. The fork function creates a sub-process. The sub-process and the parent process start to run the program after the split at the same time (in fact, it is a CPU time-sharing

This chapter describes the communication between kernel subsystems. Communication between kernel subsystems uses the notification linked list mechanism? For example, the system detects that the network of an interface is disconnected, so it notifies

Original link http://www.banping.com/2010/01/12/linux_gssftp/   Both RedHat and centos provide a gssftp service. The usage is as follows: [Root @ Linux local] # cd/etc/xinetd. d[Root @ Linux xinetd. d] # lsChargen cups-LPD daytime-udp echo-udp

  Int ip_rcv (struct sk_buff * SKB, struct net_device * Dev, struct packet_type * PT) // Several structures: sk_buff socket cache. The net_device network device structure is the basic data structure of all network structures. , Packet_type prototype

Common options for Linux static and shared libraries-C ※preprocessing: only object files are generated and generated. o file-O ※generate the target file. If this option is not included,. out-ANSI ※support For ansi c-include file ※specify the include

Http://www.nomachine.com/It is n times smoother than VNC graphics and consumes less resources. Server: centos 5.5 64-bit Hardware 400 MHz Processor 128 MB RAM 35 MB free disk space on your hard drive Network Connection (either a LAN, or

U disk to start Linux1. Install grub to the USB flash drive1. Use the fdisk tool provided by Linux to format the USB flash disk as the boot disk.1), => fdisk-l view the mount point of the USB flash diskMy USB flash drive is mounted to/dev/SDC, And

Run the Mount-t cifs-O username = administrtor/192.168.1.5/123/mnt/NAND command to mount Windows shared folders in Linux. Sometimes, various errors may occur, such as host is Dow and errno 112. The error may be due to the following reasons: 1.

Create Linux boot U disk this entry was posted by admin "href =" http://linuxstartu.jiaogen.com/author/admin/ "> Admin Friday, 9 then l, 2010 I use RedHat As5 32 bit. The approximate steps are as follows: 1. Insert a USB flash drive into the Linux

Http://www.cnblogs.com/magicbox/archive/2012/02/01/2363880.html ========================================================== ======================== I. Basic concepts of Message QueueMessage Queue (also called Message Queue) is one of the three inter-

As mentioned above, there are so many common commands that we often use, which are timer and calendar. They are generally run through crontab; crontab specifies to execute specific scripts at a fixed time or interval. Common crontab parameters