Linux Special permissions

A friend who sees the permission to have a directory is RWXRWXRWT is surprised what this t is, how is it not X or-? Search for the following discovery: This t represents the so-called sticky bit. Sticky bit: This bit can be understood

Linux-system calls and library functions

Basic concepts of documentationFileObjects that can be read and writtenHave a certain right attribute, including access rights, types, etc.File systemA collection of files and their attributes, providing a naming and management mechanismFile

What books should you read about Linux?

This is a comprehensive book recommendation article, written on the reader's request, about Linux. Turing Linux Classic book a lot of natural, in addition, the newly published arm, Linnas of the biography, also popular with readers. This time summed

Linux Common commands

The processor architecture of the Arch Display Machine (1) UNAME-M display the processor architecture of the Machine (2) uname-r shows the kernel version being usedDMIDECODE-Q Display hardware system components-(SMBIOS/DMI) hdparm-i/dev/hda A list

Detailed parsing of Linux memory usage methods

I am a programmer, so I am here to explain the use of Linux memory in a programmer's perspective.When it comes to memory management, the two concepts that flash in our minds are virtual memory, with physical memory. These two concepts are mainly

Experiment on--SET-UID program vulnerability in Linux test

SET-UID Program Vulnerability Experiment20125121First, the experimental descriptionSet-uid is an important security mechanism in UNIX systems. When a set-uid program runs, it is assumed to have the permissions of the owner. For example, if the owner

Linux Learning---(compression and decompression of files command zip unzip tar, shutdown and restart commands shutdown reboot ... )


1. Compress and Decompress commandsCommon compression formats:. zip,. gz,. bz2,. tar.gz,. tar.bz2,. rar. zip format compression and decompression commandsZip compressed file name source files: Compressed filesZip-r compressed file name Source

Linux Experiment two: Set-uid Program vulnerability Experiment

SET-UID Program Vulnerability Experiment20125113 ZhaoqiaoFirst, the experimental descriptionSet-uid is an important security mechanism in UNIX systems. When a set-uid program runs, it is assumed to have the permissions of the owner. For example, if

File encryption and decryption of Linux security mechanism

"What is encrypted decryption"encryption: that is, the process of converting plaintext into redact is to use a special algorithm to change the original information data, so that unauthorized users even obtain the encrypted information, but because

Linux Platform x86 compilation (ix): cyclic instruction

"Copyright Notice: respect for the original, reproduced please retain the source:, the article only for learning Exchange, do not use for commercial purposes"loops are also a way to change the order in which instructions are

linux-"Linux system root sub-directory Functions" (2)

"Linux system root sub-directory functions"/root directoryThe corresponding files for the/bin System Execution command are in this directory/sbin System Super Administrator execute command files are in this directory/dev device CPU, memory RAM, disk

How to view CHM files under Linux

Transferred from: sudo dpkg-i chmsee_1.3.0-2ubuntu2_amd64.deb installation package,: Chmsee/chmsee_1.3.0-2ubuntu2_amd64.deb Ubuntu's official

Linux kernel modules

A simple drive The use of the module can make the Linux kernel easy to crop, according to different application needs to get a minimum kernel, while debugging kernel driver is also more convenient, such as if the debug i²c driver, if not the

"Linux" Unix-like operating system process monitoring and control tool Supervisor

Supervisor is a client server system that allows users to monitor and control the number of processes on Unix-like operating systems.Official website http://supervisord.orgInstallation1. Easy_install Supervisor2.Setuptools (latest) from

Linux Yum Command detailed

Yum (full name Yellow dog Updater, Modified) is a shell front-end package manager in Fedora and Redhat and SuSE. Based on RPM package management, the ability to automatically download the RPM package from the specified server and install, can

Linux Regular Expressions-basic regular expressions (based on grep)

Linux Regular Expressions:In short, a regular expression is a set of rules and methods that are defined for processing a large number of strings, such as assuming @ represents 123456,! for ABCDE. By defining these special symbols, the system

Linux Memory Management---The difference between virtual address, logical address, linear address, physical address (i)

The analysis of Linux memory management mechanism, can not leave the above several concepts, before introducing the above concepts, first from the "deep understanding of the Linux kernel," the book to extract a few paragraphs on the above noun

Design and implementation of "turn" Linux Futex

IntroductionIn compiling the 2.6 kernel, you will see in the compilation options [*] Enable Futex support this item, online search, some data will tell you "do not choose this kernel can not be properly run using GLIBC program", What is Futex?

Installation and use of Linux Doxygen

First, Introduction Doxygen is an open-source, cross-platform, document system that is described in a similar Javadoc style, fully supported in C, C + +, Java, objective-c, and IDL languages, partially supported by PHP, C #. The syntax for

Linux Regular expressions

Regular Expressions (Regular expression) are a standard for string processing, and for system administrators, regular is a compulsory skill. For example: The system generates too much data, as a system administrator to see so much information every

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