Linux

1. DUP functionThe 1.1 DUP function is used to copy a file descriptor , and the copied file descriptor can be used normally (see Example 1). The DUP function returns one of the smallest available file descriptors in the current File descriptor table

1 IntroductionThe meaning of GCC is only GNU C Compiler. After so many years of development, GCC has not only supported the C language; it now also supports the ADA, C + +, Java, Objective C, Pascal, COBOL, and Mercury languages that support

I. Introduction of HTOPThis is htop, a interactive process viewer for Linux. It is a text-mode application (for console or X terminals) and requires ncurses.Comparison between Htop and top In ' htop ' can scroll the list vertically and

1. Commands for managing files and directories:(1) Pwd:print working directory (print working directory), when entering PWD, requires the Linux system to display the current location.(2) CD command: The CD command is used to change the directory in

quickly build NTP time synchronization server under LinuxBackground:server more, time consistency and readiness is particularly important, although this problem is always ignored, but the unification of time is very necessary, because the time

Help information for the date command[Email protected] source]# date--helpUsage: date [options] ... [+ format]Or: Date [-u|--utc|--universal] [MMDDHHMM[[CC]YY][.SS]]Displays the current time in the given format, or sets the system date.-D,--date=

The RCU of lock mechanism in Linux kernel, the big kernel lockIn the last blog post, the author analyzes the use of completion and mutual exclusion and some classic questions, the following author will focus on this blog post on the RCU mechanism of

Originally from: http://lwn.net/Articles/336224/Select the content of interest simply translated below :The interest in the kernel community has always been to ensure quality. We need to ensure and improve quality is obvious. But how to do it is

In a previous blog post Linux kernel module, a way to find out about memory leaks >> , I introduced a method of finding kernel memory leaks. This is a few months, and customers complain: using the product 5 days or so, the SUSE server due to memory

1) Local is windows:First, install the Xmind and xming-fonts 2 software, the latter is the font plug-inSecond, use the Telnet software to turn on the "X11 forwarding function" (X11 Forward)Finally, run commands directly in the character window, such

One, compression, decompression command1. Compact format: GZ, bz2, XZ, zip, Z2, compression algorithm: The algorithm is different, the compression ratio will be different;3, the original compression command: Compress:filename. ZDecompression:

Du and DF[[email protected] samba]# dumpe2fs/dev/sda3|grep "Block size" 4096 bytesThe actual size of the du content, in bytes, added to the statistical file sizeDF occupies space size, in blocks, statistics block usageThe du-s command increments the

[Linux] How to enable a program on a terminal to close the terminal without exiting, linux terminalZookeeper does not exit when the terminal starts a program to close the terminal. Generally, when the terminal is closed, the background program

CentOS language, time zone, and time modification Modify language: # Vi/etc/sysconfig/i18nLANG = "en_US.UTF-8"SYSFONT = "latarcyrheb-sun16" Modify the/etc/sysconfig/clock file: ZONE = "Asia/Shanghai" UTC = true ARC = false Add the/etc/profile

Linux Command 2 and Linux Command 2 In the process of viewing linux, File Attribute management is a difficult point. Therefore, as a beginner, I put it directly behind it for further research, therefore, I personally think it is an excellent opinion

Install the Java 8 Development Environment under Debian7.4 (wheezy) For Ubuntu systems, installing sun-java is relatively simple. After adding the source, you can directly use the command to install it. The previous Ubuntu installation of java 7 ()

How to fix the problem that the PPA source cannot be added to Ubuntu/Mint? Chetan Jain, an ordinary It's FOSS reader, contacted me today and asked me how to fix the problem that the PPA source cannot be added in Ubuntu 14.04. Chetan encountered

VirtualBox Security Android-x86 4.0 graphic tutorial Why are Android virtual machines much slower than iOS and WP7 virtual machines? The reason is as follows: 1. the Android Simulator simulates the ARM architecture (arm-eabi), while the target

Use UEFI to protect the environment before the operating system is loaded We are sorry to find that, in some comments, there are misunderstandings about how Microsoft implements secure startup. Therefore, we wrote this blog post specially, further

Linux study notes -- Article 1 -- Ubuntu installation and operation, learning notes: ubuntu I am a Windows user. Due to the needs of Coding and the convenience of development in Linux, I started to use Linux. Of course, I still cannot leave Windows.