How to Install and configure Apache Storm

STORM INSTALLATION SETUP

Before setting up Apache Storm, Zookeeper server must be setup in the cluster, which takes the main responsibility of running Storm cluster. Zookeeper is not used for message passing, so the load Storm places on Zookeeper is quite low. Single node Zookeeper clusters should be sufficient for most cases, but if you want failover or are deploying large Storm clusters you may want larger Zookeeper clusters. Installing and Setting up Zookeeper:

# cd /usr/local
 # wget http://mirror.nexcess.net/apache/zookeeper/stable/zookeeper-3.4.6.tar.gz
 # tar -xvf zookeeper-3.4.6.tar.gz
 # mv zookeeper-3.4.6 zookeeper

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How to Install MRTG with SNMP on Linux RedHat 6.5 / CentOS 6.5

Before you Install MRTG please verify apache is installed on your machine

[root@mysql01 ~]# vi /etc/hosts
 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.49.19 mysql01 Continue reading "How to Install MRTG  with SNMP on Linux RedHat 6.5 / CentOS 6.5" 

How to Install RHQ on CentOS 6.5

Install PosgreSQL

3.1.1. Type ‘yum install postgresql*’ making sure to include the asterisk (*)
3.1.2. Type ‘y’ when prompted (happens twice)

Confirm java version

4.1.    Type ‘java –version’
4.2.    Confirm it’s running at least 1.6 and using OpenJDK (or Oracle/Sun Java or JRockit, but NOT GNU Libgcj)

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VPN CLIENT INSTALLATION on Linux

VPN INSTALLATION on Linux

[root@app-01 ~]# uname -a
 Linux app-01 2.6.32-431.11.2.el6.x86_64 #1 SMP Tue Mar 25 19:59:55 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
[root@app-01 /]# mkdir download
 [root@app-01 /]# cd download/
 [root@app-01 download]# ll
 total 0
 [root@app-01 download]# mkdir vpn
 [root@app-01 download]# cd vpn/
 [root@app-01 vpn]# ll
 total 0
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How to verify DDOS attack with netstat command on Linux Terminal

How to verify DDOS attack with netstat command on Linux Terminal

Some examples with explanation

netstat -na

This display all active Internet connections to the server and only established connections are included.

netstat -an | grep :80 | sort

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How to Install & configure APACHE GRAPH BASED MONITORING USING DARKSTAT

APACHE GRAPH BASED MONITORING USING DARKSTAT

Use for verification apache benchmark tool for Graph statistics collect.

Apache benchmark 10000 requests concurrency Results.

[root@mysql01 ~]# yum install httpd
[root@mysql01 ~]# /etc/init.d/httpd start
[root@mysql01 ~]# rpm -Uvh libpcap-0.9.4-15.el5.x86_64.rpm

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