Linux

  A simple example of select in Linux: # Include # include # include # include # include # include int main () {int keyboard; int ret; fd_set readfds; char key; struct timeval timeout; char * Path = "/dev/tty"; keyboard = open (path,

1. awk obtains the specified item in the file: The system reads a row of data and determines the specific item based on the "$" matching number. Then, it continues to read the next row until the end of the file.For example:Awk '{print $2}' awktest.

Wget network download, supporting HTTP/https/FTP protocol Wget [Option] [url] By default, downloads are stored in the current folder. Of course, you can set your own location. -O is to put the download in the specified folder. -PCreate a

1. Use setup to select Telnet and xinetd services in System Service, exit setup, and restart the xinetd service. Service xinetd restart 2. Edit the/etc/xinetd. d/telnet file to ensure that disable = No 3. By default, the root user cannot be used

1 Linux security is non-toxic 2. There are few Linux games, especially those that do not have live football. This prevents you from directly clicking the live football icon when you start your system like windows. 3 programming tools such as GCC,

I. Compile and install the source file. Here we use version 1.7 for installation, but some content uses version 1.6. Therefore, during installation, we should change the two versions of source file 1.6: subversion source file subversion-1.6.1.tar.gz

1.4.1 standard (ansi c, POSIX, svid, xpg ,...) Ansi c: This is the C language standard set by ANSI (US National Standards Agency) in 1989. It was later accepted as a standard by ISO (International Organization for Standardization) and therefore

Linux --- inotify file system change notification mechanism In the development process of Linux, the user State requires the kernel to provide some mechanisms so that the user State can know in time what happened to the kernel or underlying

Translator: Guo shaobei2009/12/09 Linux-2.6/documentation/driver-model/platform.txt Platform devices and drivers~~~~~~~~~~~~~~View the driver model interface for the platform bus in : Platform DeviceAnd platform-driven. This pseudo bus is used to

Baidu Linux dnw can find a lot of download information. The download file contains two files, one is the dnw USB driver secbulk, and the other is the dnw application. The two files must be compiled separately. The method used to compile secbulk is

Http://blog.chinaunix.net/u1/46715/showart_1663653.html Author: wmmwang (UNC, Wang Minmin)Environment: fedora8Arm-Linux-GCC 3.4.1MiniGUI: 1.3.3Date: Based on previous experience, change the place to be changed. Then make, no problem.Then, sudo make

Install SSL first, compile and install Apache, and then configure the certificate. 1. Download Apache and OpenSSLWeb: http://www.apache.orgHttp://www.openssl.org2. Extract# Tar zxvf httpd-2.0.54.tar.gz# Tar zxvf openssl-0.9.7g.tar.gz3. Compile and

The waiting queue of Linux kernel is based on the double-loop linked list and closely integrates with the process scheduling mechanism to implement the core asynchronous event notification mechanism. There are two data structures in this linked list:

--- Excerpt from laruence's private dish- Http://linux-vbird.bluedata.org/linux_base/0320bash.htm#variable Although Http://blog.csdn.net/zhuying_linux/article/details/6633022 Http://blog.csdn.net/longxibendi/article/details/6125075 But the statement

38. Sort instance details 1. Sort-T:-r sorttext: The separator is ":", and is classified by the first domain.-R indicates the reverse order. 2. Sort-t': '-K2 sorttext:-K2 indicates sorting by the second region 3. Sort-T:-k3n-K4 sorttext:-k3n

Errors such as "undefined derefence" will be reported in the curl library in Linux, static library in GCC or G ++ static llink libcurl, therefore, you must pay attention to the selection of the compilation library during use (note the static

1. WC count or number of lines: Echo "Hello \ n leeboy" | WC-L: Output 2: two lines Echo "Hello word \ n leeboy" | WC-W: Output 3, indicating 3 words 2. The etc/passwd and etc/shadow files both store the user and password. Shadow has strong security

Chapter 6: User Programming: terminal control and Signal 6.1 1. Software Tools: Programs that do not distinguish disk files from Device Files 2. User Program:Specific DevicePrograms -------- These programs set the Terminal Driver's shortcut keys and

The full text of this article is reproduced at http://blog.csdn.net/mianjunan/article/details/6676906. The boot process refers to the entire process from powering on the computer until the user logon screen is displayed in Linux. Analyzing the Linux

The full text of this article is reproduced at http://blog.csdn.net/dog250/article/details/6243276. I have not studied other architectures in depth, but many of us know about x86. Its memory can support 4 GB (PAE is not considered), because the