Cloud Applications

1. RHEL and centos are commercial versions of RHEL. there are still differences between RHEL and centos based on open source code and version recompilation. RHEL stability is higher than centos. However, RHEL upgrade and yum source services must

The following describes the usage of the tcpdump command in Linux. For more information, see dumptrafficonanetwork, different data packets can be intercepted based on the specified network interface. It will output the description of the report

When the apache site is under severe cc attacks, we can use iptables to prevent CC attacks on the web server and automatically shield the IP address. 1. system requirements (1) Linux kernel version: 2.6.9-42ELsmp or 2.6.9-55 ELsmp (other kernel

If you do not know the basic knowledge about IPTABLES, we recommend that you first check it out. To configure a filter table firewall. 1. view the settings of IPTABLES on the local machine. [root @ tp ~] # Iptables-L-nChainINPUT (policyACCEPT)

1. tcpdump is a good tool for tracking the system behavior of processes in the local machine. in the debugging of network problems, tcpdump is an indispensable tool, like most excellent linux tools, it features simplicity and power. By default,

The most powerful vimrc file in history, which is said to have 800 lines, is still the result of the author's simplified design. I made some minor modifications while keeping the original author's idea as much as possible. The main changes are as

Applicable in Windows and Linux, no need to change, except for resetting the program path used; applicable in GUI, Console, or terminal, no need to change. Download/view on my site: _vimrc,_vimrc.txt,_vimrc.html

1. vim # enter vim in the command line and press the I key in the vim editor 2. I #. -- INSERT -- # INSERT command is displayed at the lower end, any character in vim may be used. 3.Esc# exit the I (insert) command for other commands. 4.: rfilename #

The partition format of Windows 2003/XP/is NTFS. The NTFS format supports a large hard drive of up to 2 TB, and its performance will not decrease as the disk capacity increases. However, because this format cannot be used directly in Linux, Linux

Recently, I finally installed a linux server in my company. The linux system installed was CentOS6.3. during the installation, I did not cover the partitions of Windows2003, but I just allocated a small disk (4 GB) partition swap, and then allocate

As a network administrator, you need to store user information for each network device you want to manage. However, network devices generally only support limited user management functions. Learn how to use an external RADIUS server on Linux to

Comment: Ubuntu is a Linux operating system based on desktop applications. it is based on the Debian release and GNOME desktop environments, next I will share with you how to use a USB flash drive to install the Ubuntu system. if you are interested,

Fedora17 sets the terminal shortcut key to quickly open the desktop in the upper left corner of the desktop [activity] -- & gt; [application] -- & gt; [system tools] -- & gt; [System Settings] -- & gt; [keyboard] -- & gt; [shortcut key] -- & gt;

In ubuntu software installation of various formats and commonly used commands Ubuntu software installation methods: www.2cto.com (1). bundle format to VMware-Workstation-Full-7.0.0-203739.i386.bundle as an example of the command is as follows:

Cause Analysis of UDP packet loss in linux kernel 1. UDP checksum and error phenomenon: you can use netstat-su to view UDP error packets. Tcpdump packet capture: enable the captured udp packet in wireshark and enable the checksum option. Solution:

Ubuntu12.04 after installing the nvidia graphics card driver, you cannot enter the graphic interface solution [cpp] www.2cto.com to delete the nvidia driver. Sudoapt-get -- purgeremovenvidia-* sudoapt-get -- purgeremovexserver-xorg-video-nou...

Concise Linux command line Note 2: cdcdcd is the abbreviation of changedirectory, mainly used to change the current directory www.2cto. com1. usage cd [dirName] 2. common parameters without parameters indicate that the path is directly changed to

Linux server hardware and operating system information command hardware information www.2cto.com view cpu model and clock speed (unit: gihz, precursor Hertz GHz) cat/proc/cpuinfo | grepname | cut-f2-d: | uniq-c view cpu clock speed (unit: z mh...

Install the EXIF Library in linux 1. view the extension package File: www.2cto. comcd/usr/local/php-5.2.17/ext/exif2, add extensions/usr/local/PHP/bin/phpize to php dynamically. /configure -- with-php-config/usr/local/php/bin/php-confi install EXIF

Simple batch file name change script #! /Bin/bash # rename. sh # Purpose: rename the jpgpng file www.2cto. comcount1; forimgin *. jph *. pngdonewimage-$ count. $ {img ##*.} mv & quot; $ img & quot; $ new & quot; 2 & gt;/dev/null Simple batch file