Automation variables in makefile $ @, $ %, $

In the automation variables $ @, $ %, $ in the makefile mode rule, the target and dependent file names of the Rule represent a class of file names; rule commands describe the reconstruction process of all such types of files. Obviously, no specific

Linux wireless ESSID: off/any error

Linux wireless ESSID: off/any error I used Distribution is SUSE. I found that the wireless network could not be scanned yesterday. Enter iwconfig wlan0 in the command line to get the result: www.2cto.com wlan0 IEEE 802.11bgn ESSID: off/any Mode:

Nginx Summary (5)

Nginx small summary (5) nginx small summary (4) http://www.bkjia.com/ OS /201303/192406.html nginx connection php www.2cto.com nginx itself only supports static text, when processing dynamic web pages, you need to use other modules (plug-ins), such

Basic LINUX operations: compression/decompression, CD mounting, mirror preparation, YUM library Configuration

Basic LINUX operations: compression/decompression, CD mounting, mirror preparation, YUM library ConfigurationToday, I want to talk about common LINUX operations first! I hope you can read this article carefully. Xiao Ning wrote this article

How to back up and restore the system in Ubuntu

Before using Ubuntu, I believe many people have experienced how to back up and restore the system. If you have backed up a Windows system, you must remember: First, you need to find a backup tool (usually private software), and then restart your

Differences between line breaks in Linux and Windows

Line breaks in Linux and Windows 1. line breaks: www.2cto.com 1. The line breaks in windows are \ r \ n, 2. The line breaks in linux/unix are \ n. Here: carriage return: \ r = 0x0d (13) return; # Enter (carriage return) linefeed: \ n = 0x0a (10)

Zombie Process Analysis

A zombie process is not a wait sub-process after the parent process fork. When a sub-process exits, the kernel releases all resources of the process, such as file descriptors, memory, and so on. However, it still retains certain information for the

Implementation of CentOs DNS Functions

First, configure the linux network connection! 1. Install the relevant suite www.2cto.com [root @ localhost ~] # Yum-y install bind bind-chroot2, configure the experiment environment [root @ localhost ~] # Cd/var/named/chroot [root @ localhost

How to install the nvidia graphics card driver in Ubuntu 12.10

The problem of installing the nvidia graphics card driver in Ubuntu 12.10 is the same as that in all Linux distributions. By default, Ubuntu uses the nouveau open source driver. The driver is good, and even supports some 3D games. However, since

Regularly retrieve process memory and write logs

Regularly retrieve the process memory and write the log Shell code www.2cto.com $ cat mem. sh #! /Bin/bash LOGFILE = "/xxx/mem. log "date + % Y-% m-% d" "% H: % M: % S >>$ LOGFILE ps aux | grep 'bin/eas. py' | awk '{if ($13 ~ /^ \ W + $/) {print $13,

Linux telnet installation Configuration

Linux telnet installation configuration [root @ Demo Packages] # rpm-ivh xinetd-2.3.14-33.el6.i686.rpmwarning: xinetd-2.3.14-33.el6.i686.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEYPreparing... ########################################

View system and hardware information in linux

Linux: view system and hardware information 1. View System Information 1. view the current operating system release information: # cat/etc/issueWelcome to SUSE Linux Enterprise Server 11 (x86_64)-Kernel \ r (\ l ). 2. view the kernel information of

Shell judgment and Comparison

Shell judge and compare 1 shell $!, $ ?, $, $ @ $ N $1 the first parameter, $2 the second... $ # The number of command-line parameters. $0 The name of current program. $? Last command or function's return value. $ The program's PID. $! Last

Gentoo software installation error Active gcc profile is invalid Solution

Gentoo software installation error Active gcc profile is invalid solution version: Gentoo Base System release 2.1 time: 2013-3-21GCC: gcc version 4.6.3 (Gentoo 4.6.3 p1.11, pie-0.5.2) after installing with a install-x86-minimal-20121213, upgrade the

Diff and patch commands

Diff and patch command 1: if the current directory contains the linux-3.0 source directory file and the modified linux-3.0-s3c2440 directory file, how to generate the patch file? >>> Diff-Nuar linux-3.0 linux-3.0> linux-3.0-s3c2440.patch to generate

Fixing & quot; perl: warning: Setting locale failed. & q

Fixing "perl: warning: Setting locale failed. "solution error prompt: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = "en_US: en", LC_ALL = (unset), LC_PAPER = "en_US", LC_ADDRESS = "en_US ",

Linux Virtual Machine Access

Linux virtual machine online Virtual Machine linux version: redhat9.0 Summary: to ensure that the virtual machine system can access the Internet, you must first solve the connection relationship between the virtual machine and the real host. VMware

Gpasswd command in linux

Gpasswd command function in linux: Management Group usage: gpasswd [-a user] [-d user] [-A user,...] [-M user,...] [-r] [-R] groupname parameter:-a: Add User to group-d: delete user from group-A: Specify administrator-M: the purpose of the specified

Configuration file for WDCP web engine Switch

Configuration file for WDCP web engine switch [php]/www/wdlinux/wdcp/data/sys_conf.php

Installation and simple configuration of Linux VNC server

Installation and simple configuration of Linux VNC serverAbstract: installation, simple configuration, and use of Linux vnc server. This article is only applicable to common users (for example, users who have installed Linux in virtual machines),

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