Linux

Inux system Programming I've been looking at the Original link http://www.cnblogs.com/skyme/archive/2011/01/04/1925404.htmlShared memory is a piece of memory that is reserved for the system to be considered for communication between multiple

Linux provides top, PS commands to view current CPU, mem usage, briefly described as follows:One, using the PS view process resource consumptionPs-auxWhen you view process information, the third column is CPU consumption.[Email protected] utx86]# Ps-

transferred from:http://blog.chinaunix.net/u3/100239/showart_1984963.htmlFirst introduce diff and patch. There is no need to introduce all the options on the man online document. In 99% of the time, we will only use a few options. So you have to

Ioctl Supported operations, such as Simple Data transfer Control actions, such as user space initiating pop-up media actions Feedback the status of your hardware, such as reporting error messages

September 25 News from Beijing time, Linux users today got a "surprise"! The Red Hat security team found a cryptic and dangerous security flaw in a bash shell that is widely used in Linux. The vulnerability is known as "Bash Bug" or

First, SendMail alarm notification1, stop the system comes with the SendMail service #/etc/init.d/postfix STOP2, install SendMail and mailx# yum-y install SendMail mailx3, modify sendmail config file # cp/etc /mail.rc/etc/mail.rc.bak# cat

The shutdown command is the most commonly used shutdown command, which can be used not only to shut down the system immediately, but also to shut down the system Linux shutdown command at a specified time shutdownShutting down, rebooting the

KernelbuildGuide to building the Linux kernel.Where do I find the kernel?The latest source code for the Linux kernel are kept on kernel.org. You can either download the full source code as a tar ball (not recommended and would take forever to

1. Check the system time zone:Method 1:[Email protected] ~]# date-rSun, Sep 2014 23:10:23-0400Method 2:[Email protected] ~]# Cat/etc/sysconfig/clock# The ZONE parameter is only evaluated by System-config-date.# The timezone of the system is defined

1. Based on linux2.6.32, only for Mem (SDR)2. Please refer to read: Power management solution APM and ACPI comparison. docIntroduction to hibernation and wake-up of Linux systems. doc3. This article first studies the sleep and wake-up of Standard

A.1 Overview　　To facilitate scaling to the new architecture, the kernel strictly isolates architecture-related and architecture-independent code. Processor-specific portions of the kernel, header files containing definitions and prototypes are

Linux disk partition (1): Add, linux disk partition **************************************** ******************************** ****************  Original works, from "Deep Blue blog" blog, welcome to reprint, reprint please be sure to indicate the

[Gadgets] Linux following formatting tools, linux formatting tools When you see the command output columns in Linux being distorted, isn't it uncomfortable? The column command can solve this problem easily. For example: We generally only use the

Getting started with Linux: How to Use tcpdump to capture tcp syn, ACK, and FIN packets Q: I want to monitor TCP connection activities (for example, three handshakes for establishing a connection and four handshakes for disconnecting ). To

Detailed explanation of VNC Server Remote Desktop configuration under CentOS PS: In the past, remote graphic desktops in Linux were basically not used. Some colleagues developed a few days ago had a problem configuring CentOS vnc. If you solve this

Practical Tips for linux: xvidcap, a video recording software in linux1. Introduction to xvidcapIn linux, xvidcap is a good choice for video recording. Xvidcap is a small tool that records operations on the screen and saves them as videos. For those

Linux Advanced Skills: openstack Construction and Application under redhat1. Introduction to openstackOpenStack is a free software and open source code project jointly developed by NASA and Rackspace with Apache license authorization.OpenStack is a

Awk BASICS (Marco video), awk basics Marco Awk Basics1.1 print Print format: Print item1, item2 ,.... Key points: Example: # Awk 'in in {print "line one \ nline two \ nline three "}' Awk-F: '{print $1, $2}'/etc/passwd Built-in variables: ORS (output

Detailed description of Linux rpm command parameters and rpm usage RPM is a RedHat Package Manager (RedHat Package management tool) similar to "Add/delete programs" in Windows" Run the rpm installation packageBinary and Source packages. The binary

Heartbeat + LVS build a high-availability server Load balancer Cluster 1. Introduction to heartbeat: The Heartbeat project is an integral part of the Linux-HA project, which implements a high-availability cluster system. Heartbeat service and