Linux

The topic is a bit big, but there are some anger!Our gateway products are currently in the system testing phase, not too smooth, is too bad! All the slack, including me! I'm still looking for a chance to hit the counter, except slack! By the way,

In fact, this blog is reading ldd3 Some of the summary, to consolidate their own learning, but also convenient for later use. You can also read the original LDD3 directly.Lock traps are the so-called lock traps that prevent deadlocks.       

first, work management1.&: Throw the command directly into the background to executeEg:tar-jcv-f infor/t.tar.bz2 Infor/test1 & (Compress test1)2,[Ctrl]-Z : Drop the current job in the background to pause3,jobs: View the current background work

Linux is a very strange system, almost every different version, the installation and other important commands it uses are changed. If you want to master an OS, then if you install software/applications, that's the first step in getting started.In

Df-h user-friendly display file system partition informationNote: The directory in Linux is also a file, do not confuse the following directory file to say.The traditional way to view the file size can be used: ll-h/directory/file name, you can see

The Select,epoll is a mechanism for IO multiplexing. I/O multiplexing is a mechanism by which multiple descriptors can be monitored, and once a descriptor is ready (usually read-ready or write-ready), the program can be notified of the appropriate

How to view the number of bits in the Linux operating system1. Programming Implementation:Returns the value of sizeof (int) in the program, and the result is the number of bytes of the operating system. If return 4 is a 32-bit operating system,

To create a cron service for the current user1. Type CRONTAB-E edit crontab service fileFor example, the contents of the file are:*/2 * * * */bin/sh/home/admin/jiaoben/buy/deletefile.shSave the file and exit*/2 * * *

crontab syntax Lists链表值: Comma , indicates the side-by-side, according to order; Examples: "1,2,5,9", "0-4,8-12" . Ranges of numbers区间值: The hyphen - , ' A-B ' for each integer value of the [a, s] interval. Asterisk*to iterate over * a value:

/root directory/ boot system boot related files, such as kernel, INITRD, and Grub (bootloader)/ Dev Device File block device: Random access, data block character device: linear access./ etc system global configuration file/ home directory for

The path to LINUX explorationThe path to LINUX discovery table of Contents 1 Preface 2 configuration 2.1 Vim 2.2 Emacs 2.3 Input Method Configuration 2.4 Bash 2.5 Ag and Percol 2.6 git 2.7

1.uptime commandOutput: 16:11:40 up, 4:21, 2 users, load average:0.00, 0.01, 0.002. View the/proc/uptime file calculation system start timeCat/proc/uptimeOutput: 5113396.94 575949.85The first number is the system has been running for 5,113,396,.94

File descriptorFor the kernel, all open files are referenced by a file descriptor. The file descriptor is a non-negative integer. When an existing file is opened or a new file is created, the kernel returns a file descriptor to the process. When

Set the executable program as the Linux service startup        How to set our own program as a Linux service program, and implement boot up, need to go through the following three steps:       1 put the executable in a place where a Linux system can

In general, we would like to install a partition solution that uses the Mount command because I want/dev/sda3 to install/media/aborn/data by using the following commandsudo mount/dev/sda3 /media/aborn/dataBut the bad thing about this approach is

1. What does a line in the program start with the character "#"?Beginning with the character "#" is a comment in assembly language, and the assembler does not do any processing of the comment.2. What is the difference between assembly language files

Condition variableIf the mutex between threads is used to synchronize access to shared data, then the condition variable is the value used to share data between threads. A condition variable provides a mechanism for notification between threads that

Enable vim to display the row number in CentOSThere may be n accounts in CentOS, so there are two ways for vim to display the row number: to display the row number only for the current user and to display the row number for all users I. only ask

Install LNMP environment source code in CentOS7 System: CentOS 7 x86_64NGINX: nginx-1.7.12Database: mariadb-10.0.13PHP: php-5.5.23First, make some preparations. First, replace the centos7 firewall with iptables. For more information, see the

Solution to the problem that the USB flash drive cannot be started after Centos is installed 1. Switch to the root user # Su -- root 2. Go to grub Mode # Grub 3. Follow these steps: Grub> find/boot/grub/stage1 or find/grub/stage1 It usually