Cloud Applications

1. install CDH4 on the official website 1. install CDH4On the official websiteStep 1a: Optionally Add a Repository KeyRpm -- import http://archive.cloudera.com/cdh4/redhat/5/x86_64/cdh/RPM-GPG-KEY-clouderaStep 2: Install CDH4 with MRv1Yum-y

We add port 80 as an example: [root @ centoshttpd] #/sbin/iptables-IINPUT-ptcp -- dport80-jACCEPT save [root @ centoshttpd] #/etc/rc. d/init. d/iptablessaveiptables: save the firewall rule to/etc/sysconfig. The following is an example of adding port

1. let's talk about the difference between RHEL and CentOS in your eyes. I 've written an article on the Internet, saying that someone is doing a system for a securities company, party A uses the CentOS + RedHat optical fiber interface driver. as a

Overview iptables-save [-c] [-ttable] indicates to dump the content of an IPTABLE to STDOUT (standard output) in a simple syntax format ). you can use the shell to provide I/0 redirection to write to a file-c, -- counters output contains the current

PS: tcpdump is a tool used to intercept network groups and output group content. it is simply a packet capture tool. Tcpdump is the preferred tool for network analysis and troubleshooting in Linux based on its powerful functions and flexible

Linux with tcpdump long-term packet capture operation method command: tcpdump-ieth1-s0-wk.cap last added is to make this command in the background for long-term execution, otherwise close sshclient tcpdump command will stop on its own. Then log on

The built-in firewall mechanism of Linux is implemented through the netfilter module in the kernel. Linuxkernel uses netfilter to filter incoming and outgoing data packets. netfilter consists of three rule tables, each of which consists of many

Libreadline appears when sambaclient runs. so.6: undefinedsymbol: PC solution Q: www.2cto. comyuminstallsamba-client and then run smbclient. the following error occurs: smbclient: symbollookuperror:/usr/local/lib... When samba client is running,

Linux log clearing script Python code www.2cto.com #! /Bin/bashecho & quot; linuxclearlog & quot; echo & quot; byseala & quot; echo & quot; ClearlogrootorClearlogIP & quot ;#... Linux log clearing script Python code www.2cto.com #! /Bin/bash echo

Statistics on linux servers: 1) number of port 80 connections: www.2cto. comnetstat-nat | grep-I & quot; 80 & quot; | wc-l12) count httpd protocol connections ps-ef | grephttpd | wc-l13), statistics already... Statistics on linux servers: 1) number

Use StartupDiskCreater to burn the iso of ubuntu12.04server to the USB flash drive and create a boot disk www.2cto. com2 to modify the configuration file mount /... Use Startup Disk Creater to import the iso of ubuntu 12.04 server Install the USB

Linux-connected projector solution 1: Generally, the notebook's X can be displayed on the projector only when the current resolution of the notebook is the same as that of the projector. Run the following command: www.2cto.com $ xrandroid on my

In Linux, files are marked with three time periods: creation time, modification time, and access time. In Linux, a file has three types of time: access time, modification time, and status modification time. Www.2cto.com is different from each other.

How to develop and deploy a linux server in windows: For the above problem, Jun Ge believes that he has become accustomed to developing a program in windows but often needs to perform Code Testing in linux, it is indeed a problem we have encountered

On the linux character interface, set the internet proxy to set the relevant environment variable www.2cto.com # vi/etc/profilehttp_proxyhttp: // 192.168.20.20 in the profile file: 3128 # specify the proxy server address https_proxyhttp :/... On

Common Linux commands (5) -- compression and decompression commands 1. command name: gzipwww.2cto.com execution permission: all users function description: compressed file syntax: gzip option [file] compressed format :. gzgzip can only compress

The built-in variable [plain] www.2cto in The AWK language in AIX. the comawk built-in variable awk has many built-in variables used to set environment information and can be modified. The following table lists some common built-in variables and

Linuxtouch command usage explanation command name: touch permission: all users use: www.2cto. comtouch [-acfm] [-rreference-file] [-- filereference-file] [-tMMDDhhmm [[CC] YY] [. ss] [-dtime] [-- datet... Linux touch command usage explanation

Linux obtains the process id and name as a shared library, and requires statistics on the usage frequency and usage of various applications in this library. In order to make better improvements to the main applications. Www.2cto.com, you need to

A few days ago, the leaders arranged a small project to solve the problem: In Linux, the process may crash due to various reasons. at this time, we need to find the source code of the problem in the specific row number of a file, in this way,