Tag-Archive for ◊ Linux Server Hosting ◊

Monitoring Bandwidth usage with SNMP and RRDtool for Linux
Sunday, September 28th, 2008 | Author:

Before monitor any server you need to install SNMP and RRDTool packages on monitor server and net-snmp package on server which you want to monitor.

lets assume server which has SNMP and RRDTool means monitor server has ip address 10.10.10.1
and server which you want to monitor has IP address 99.99.99.99

SNMP Installation
SNMP packages require for querring .

- type command at the prompt
#yum search snmp
It will show you different snmp packages.
You neet to install 2 packages
net-snmp
net-snmp-devel
type command
#yum install net-snmp
#yum install net-snmp-devel

RRDTool Installation

RRD store and display time-series data (i.e. network bandwidth, server load average). It stores the data in a very compact way that will not expand over time, and it presents useful graphs by processing the data to enforce a certain data density.

RRDTool 1.2.x has dependancies ,hence you need to install following packages.

* libart_lgpl-2.3.11-2.i386.rpm
* libart_lgpl-devel-2.3.11-2.i386.rpm

more…

Install Java on Linux Platform
Sunday, September 28th, 2008 | Author:

Download the JDK from http://java.sun.com/j2se/1.5.0/download.jsp
(A)  install jdk by running the RPM or bin file.

Installation Instructions

Install formats – JDK 5.0 is available in two installation formats.

  • Self-extracting Binary File – This file can be used to install the JDK in a location chosen by the user. This one can be installed by anyone (not only root users), and it can easily be installed in any location. As long as you are not root user, it cannot displace the system version of the Java platform suppled by Linux. To use this file, see Installation of Self-Extracting Binary below.
  • RPM Packages – A rpm.bin file containing RPM packages, installed with the rpm utility. Requires root access to install, and installs by default in a location that replaces the system version of the Java platform supplied by Linux. To use this bundle, see Installation of RPM File below.

Choose the install format that is most suitable to your needs.

more…

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Installing Tomcat on Linux
Sunday, September 28th, 2008 | Author:

To install apache tomcat , you need to install jdk (Java Development kit).
Tomcat need JAVA_HOME set properly before prior to operation or installation.
e.g.
JAVA_HOME=/usr/local/jdk
PATH=$JAVA_HOME/bin:$PATH

You can download the installer from
http://archive.apache.org/dist/jakarta/tomcat-5/v5.0.28/bin/jakarta-tomcat-5.0.28.tar.gz

Download version 5.0.28 to be compatible with JDK 1.4.2 because the latest versions of tomcat require JDK5

To extract and install Tomcat run this command:

]# tar xvfz jakarta-tomcat-5.0.28.tar.gz

The Tomcat files are installed in a directory called jakarta-tomcat-5.0.28 in the current directory.

Then you need to set CATALINA_HOME properly prior to start tomcat.

Use following command to set CATALINA_HOME and provide full path of tomcat directory (from toot).

export CATALINA_HOME=/user/local/jakarta/jakarta-tomcat-5.0.28

Run Tomcat

goto bin directory of tomcat
cd /user/local/jakarta/jakarta-tomcat-5.0.28/bin
]# ./startup.sh

Open web browser and type http://your_domain:8080/ you should see the Tomcat Administration page

Test Tomcat

go to webapps/ROOT in the tomcat directory and create page hello_world.html and write in it

Hello World

open the URL http://your_domain:8080/hello_world.html you should see your page.

Test JSP page

go to webapps/ROOT in the tomcat directory and create page test.jsp and write in it the following lines
<html>
<%=new String(“Hello World…”)%>
<br>
<%=new java.util.Date()%>
<br>
</html>

save and run the following URL http://your_domain:8080/test.jsp you should see Hello World.. followed by current date.

Monitor Tomcat

You can see the log file in the logs directory  /user/local/jakarta/jakarta-tomcat-5.0.28/log/

Stop Tomcat

Go to the tomcat bin directory and run command.

]# ./shutdown.sh

Note:- Apache Tomcat on Linux faster that tomcat in Windows at least 2 times in both startup, shutdown and in compiling jsp files.

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