Linux

Linux tmux Study Notes tmux is known as a substitute for screen. Let's see why: it supports pasting/copying between multiple windows, and you can choose to paste the buffer zone, which is not supported by screen. The split screen operation wins.

Squid reverse proxy working principle when a user's browser sends an HTTP request, the request is directed to the reverse proxy server through domain name resolution (if you want to implement reverse proxy for multiple WEB servers, you need to

The difference between apt-get upgarde and dist-upgrade is that apt is used in Debian/Ubuntu Linux and is used in the upgrade: www.2cto.com apt-get update apt-get upgrade apt-get dist-upgrade, but some people often ask, what is the difference

Modify the CentOS yum source to 163 backup/etc/yum. repos. d/CentOS-Base.repo www.2cto.com Modify/etc/yum. repos. d/CentOS-Base.repo [plain] # CentOS-Base.repo # The mirror system uses the connecting IP address of the client and the # update status

Git server simple Setup 1. Generate a public key. Any engineer who needs to use the git server must generate an ssh public key. You can use ssh-keygen to generate www.2cto.com ~ /. Ssh $ ssh-keygenGenerating public/private rsa key pair. enter file

In linux, the rsync server usually uses code management, data backup, and multiple servers on the same machine. If the hard disk breaks down, it is almost unable to go back to the day,Even if many backups exist, most of them are local backups.

Vim encoding Mode settings and all popular text editors, Vim can be very good to edit a variety of character encoding files, which of course includes UCS-2, UTF-8 and other popular Unicode encoding methods. Unfortunately, like a lot of software from

I learned the application of the Cluster two days ago. To sum it up, the cluster is not very difficult to understand. As long as I master its principles, it is not very difficult to implement it. Next, let's take a simple look at the cluster.What is

1. Go to the http://java.sun.com/j2se/1.4.2/download.html to download a Linux Platform JDK, it is recommended to download RPM self-extract format (RPM in self-extracting file, j2sdk-1_4_2_06-linux-i586-rpm. bin ).2. Upload the file to a Linux server

After apache and php are integrated, the apche restart prompt is as follows: Httpd: cocould not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName The solution is very simple: Localhost # find/-name httpd.

Install the source code as follows:First, remote access to the server.1. Download: VNC package from the Internet[Root @ www root] # wget http://www.realvnc.com/dist/vnc-4.0-x86_linux.tar.gz-- 14:00:42 -- http://www.realvnc.com/dist/vnc-4.0-x86_linux.

1. vmstat reports virtual memory statisticsVmstat [-V] [-n] [delay [count] delay is the delay time between two outputs. count is the number of times counted based on this interval. Example: vmstat-n 3 (refresh once every 3 seconds)Procs -----------

# Uname-a # view kernel/operating system/CPU Information# Head-n 1/etc/issue # view the operating system version# Hostname # view the computer name# Lspci-TV # list all PCI devices# Lsusb-TV # list all USB devices# Lsmod # list loaded Kernel Modules#

The subscript of the array in shell starts from 0 by default. 1. Put the string in an array to obtain its length. #! /Bin/bashStr = "a B -- n d"Array = ($ str)Length =$ {# array [@]}Echo $ length For (I = 0; I DoEcho $ {array [$ I]}Done Execution

#! /Bin/bash# Create lvs dr or tunl realservr scripts.# Chenjian 2011-09-23 VIP_LIST = "192.168.116.20 192.168.116.21"USAGE = "Usage: $0 {start | stop | status} {dr | tunl }"NAME = tunlNUM = 0  If [-z $1]ThenEcho $ USAGEExit 2Fi ACTION = 'echo $1 |

1. installation steps:1. Compile and install libevent:Wget http://monkey.org /~ Provos/libevent-1.4.9-stable.tar.gzTar zxvf libevent-1.4.9-stable.tar.gzCd libevent-1.4.9-stable/./Configure -- prefix =/usrMake & make installCd ../ 2. Compile and

  1. Install software   1) install the cvs Client $ Apt-getinstall cvs   2) install the cvs service user $ Apt-get install cvsd   2. Server Configuration   1) configure the main directory of cvs $ Mkdir/exports/cvsroot/ $

We have discussed the above two sections.Basic concepts of Linux file and directory permissions and Linux File Types and extensions. Next, let's take a look at how to modify these permissions. Commands for modifying PermissionsChgrp: Change the user

  Tcp_syn_retries : INTEGER The default value is 5. For a new connection, the kernel determines how many SYN connection requests are sent before giving up. It should not be greater than 255. The default value is 5, corresponding to the left-right

  Since 1970s, Vi has been one of the best programmers. No matter you are a beginner or veteran of Vi, the following section provides 100 useful Vi commands, which I believe will be helpful to you. Basics   : E filename OpenFilenameFor