var log syslog

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Common Linux Command Memos

1. Delete the 0-byte file:Find-type f-size 0-exec rm-rf {} \; In Exec, {} represents the file to find, \;2. View the processSort by memory from large to small: ps-e-o "%c:%p:%z:%a" |sort-k5-nrRank by CPU utilization from large to small: ps-e-o

6th. First Linux driver: Count the number of words

6th. First Linux driver: Count the number of words1 . Steps to write Linux driversStep 1 build a Linux development skeleton (load or unload Linux drivers)Step 2 Registration and deregistration of equipment filesStep 3 Specify driver-related

Step-by-step implementation of Linux device-driven HelloWorld modules

Having learned so many programming languages, there is always a hello world opening that cannot help but lament the power of Hello World. Oh, nonsense less, why the story of course to start from this Hello world.Check the kernel version used by your

Ubuntu under the hint that the U disk does not have some permission to read can not write

Under Windows, the USB stick can read and write files normally (can be copied and pasted), but found a file cannot be opened. Then, under Linux, u can only read and write to the USB stick. Tip: Read only System.Reference:

Turn: How to improve the search efficiency of text on Linux

Originally from: http://www.geekfan.net/6881/For system administrators or programmers, the grep type tool is probably the most popular when it is necessary to search for a specific text or pattern in a directory of complex configurations or in a

The difference between the cat, more, less, tail, head commands in Linux

One, cat display file connection file contents of the toolCat is a text file (view) and (connection) tool, often used in conjunction with more, and the more different is that cat can merge files. To view the contents of a file, it is simpler to use

Linux USB content for read-only files cannot store other content solutions

Do not know what situation the recent U disk problems, open U disk after all the files have a lock on the logo, just start not too care, and then want to continue in the U disk in the storage of things only to find that it is at this time the U disk

ubuntu12.04 implementation of the first device driver module HelloWorld

The previous period of time compiled Android source code, Kernel source code and the first Android program to the system.img image, and then want to write a device driver module to add to the Android source code kernel, but this is not understood at

Some practical operations for Linux to view the system's logs

Last-a the host name or IP address from which to log in to the system, displayed on the last line. -d Specifies the record file. Specifies the record file. Converts an IP address into a host name. -F Specifies the record file. -N Or

Debian/ubuntu Linux: Using HOSTAPD to build wireless access points (WAP)

Nixcraft published on August 25, 2012, updated on July 9, 2014, applicable to Debian/ubuntu, network, UBUNTU LINUX, wireless network.We have an idle USB wireless adapter (WiFi adapter), and our ISP router is wired. How do we turn our home NAS

A tutorial on creating write-protected files under Linux

If you want to write-protect some of the important files in Linux so they can't be deleted or tampered with earlier versions or other things, or in other cases, you might want to avoid some of the configuration files being automatically modified by

Linux using ACK for code search __linux

use ACK for code search under LinuxLinux | 2014-03-06 22:38:36 |  5,165 times Read | 0 review 1, installationwget Http://beyondgrep.com/ack-2.12-single-file sudo mv Ack-2.12-single-file/usr/bin/ack sudo chmod 0755/usr/bin/ack 2, the use of ACK case 1

High-load network _node.js with Node.js coordination Nginx

Nginx and Node.js are naturally paired on the topic of building high throughput Web applications. They are all based on the event-driven model and are designed to easily break through the c10k bottlenecks of traditional Web servers such as Apache.

Summary of garbage cleaning methods for Linux systems

One of the biggest advantages of Linux is that it's still stable after a while. The biggest challenge for Linux is to install it and find and configure the software you need to complete your work. Once you have finished the task, it will almost run

OpenStack's Log details _openstack

OpenStack Log recently do the project used to OpenStack, because just started to use, there are a lot of errors, and then query the log, take time to get the information of the log system down, we can see. Log is very important for a stable

How does Linux detect your webcam?

This article is reproduced to: http://www.netinstructions.com/automating-picture-capture-using-webcams-on-linuxubuntu/ If it's a USB webcam, plug it in. If it ' s a integrated webcam built into the laptop, there ' s nothing to plug in. Ubuntu

ubuntu12.04 Build Guacamole

Guacamole is a HTML5 Web application (Web application) that allows users to manipulate remote computers in a browser through the Web application and with Remote Desktop transport protocols such as VNC or RDP. In addition to Web applications,

Ubuntu 10.04 Build source tree to implement the simplest driver module

The process of installing under Ubuntu 10.04: 1. Install the software required to compile the kernel Build-essential, autoconf, Automake, CVS, subversionApt-get Install build-essential kernel-package Libncurses5-dev LIBNCURSES5 This package is used

11. Process relations and interprocess communication

11.1. The 5 states of the process state and system function and process relationship (1) process; Ready state-The process is currently all running conditions ready, as long as the CPU time to be able to run directly, run state-ready state when the

Write Kernel first Hello World

Situ Objective: To be familiar with the basic process of driver programming and debugging. 1. Prepare Operating system: ubuntu12.04 LTS2. Source Code[CPP] View plain copy #include #include static int hello_init (void)       {pr_info ("Hello,

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