Here I am sharing 10 best articles on LinuxReaders.com during year 2009.

These are not just popular viewed articles but are the best of my selection. These are useful for any linux admin to ease routine tasks.

1) Change Ubuntu 9.10 Resolution
By default Ubuntu 9.10 supports 1024×768 resolution, which is not enough for me. I needed to increase it to 1240×1024. To achive my desired resolution I run through few commands. Its easy, take a look.

2) Root login on Ubuntu 9.10
As I have already expressed my love with root access in previous post, this time I was looking for a way to use root login for GUI. One of my colleague who loves Ubuntu found simple way to login root over GUI

3) NConf Installation & Configuration
NConf is a PHP based web-tool for configuring the Nagios monitoring software. The tool is based on PHP / MySQL.

4) Root login on Fedora 12
Root Login on Fedora is not as easy as Ubuntu Root Login, here you need to modify two files to get root access.

5) Play MP3 files on Ubuntu 9.10
After installing 9.10 didn’t play mp3 files.
Whenever I tried playing mp3 files using Totem Movie Player did not played mp3 files. Although it tried searching for plugin but no plugin was found.

6)  Squid Proxy
Squid is a caching proxy server.
Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages. Squid has extensive access controls and makes a great server accelerator. It runs on most available operating systems, including Windows and is licensed under the GNU GPL.

7) Virtualization using Xenserver
I have implemented Xenserver for Virtualization. I feel this is better than community version of VMware Server & equipped with more features.

Openfire Messenger Server
For any organization it is necessary to have fastest & economical way to communicate.
Consider you have few hundred branches spread all over the country, will this be viable solution to  communicate over telephone lines?

9) Ubuntu- Sudo without password
I am Linux Admin, my routine job is to maintain proxy, nagios & mail server. I always use root user for my servers. Thus I am used to full rights.

10) Upgrade Fedora 11 to 12 -using shell
Earlier we have covered upgrading Ubuntu to the latest version. There only one command required for the upgradation. Here procedure is bit lengthy.

11) Nagios Installation
In current world everything is available online, every organization is trying to reduce their downtime. Almost all Data Centers are running hundreds of services. It is not possible for human being to monitor all services, this is where Nagios is useful. Administrator can use Nagios to monitor all hosts, services, network devices.

11 Best Articles for you -LinuxReaders. is a post from: LinuxReaders

Related posts:

1. Root login on Fedora
2. Root login on Ubuntu
3. Squid Proxy

For any organization it is necessary to have fastest & economical way to communicate.
Consider you have few hundred branches spread all over the country, will this be viable solution to  communicate over telephone lines?
During this period of recession companies are trying cut cost at max. Email is smarter way for communication but you’ll never get flexibility of messenger.

You may use gtalk / yahoo / msn messenger but this will never let all communications be recorded at central level. Organizations needs to keep records of all communications.

In today’s digital world you get pre-sales / post-sales support over Internet.
Open fire messenger server can be used for all this, you can keep records, have number of ids, enable client support over web.
I am using this at my Office for internal & branch communication.

Openfire
Openfire is a cross-platform real-time collaboration server based on the XMPP (Jabber) protocol.
Download latest version.

Installing Openfire on CentOS with MySql support
If you do not have mysql-server installed

yum install mysql-server -y
service myqsld start

Create database for openfire

mysql -u root -p
CREATE DATABASE openfire;
GRANT select,insert,update,delete,create,drop ON openfire.*
TO chat@localhost IDENTIFIED BY 'chat';

Download & Install openfire

wget http://www.igniterealtime.org/downloads/download-landing.jsp?file=openfire/openfire-3.6.3-1.i386.rpm
rpm -ivh openfire-3.6.3-1.i386.rpm
service openfire start

This was all required to be done at server end, you may use client machine for complete rest of the setup.

http://chat.linuxreaders.com:9090/

Choose language
in server settings mention fqdn (e.g I have used chat.linuxreaders.com)
choose database connection type standard, use following image to refer database configuration.

You can keep profile settings Default
Mention admin email id & password, finish setup

To create users / other chat related settings / additional plugins. (Admin console)

http://chat.linuxreaders.com:9090

Spark
Cross-platform real-time collaboration client optimized for business and organizations.
Download latest version

Open Spark & enter server, user & password details.
This is all you need to start your own messenger.

Connecting Spark client from Internet

By default installing openfire server will listen on tcp port 5222 for client.

There is no configuration required at the client end, all you need is username, password & servername.

At server end, you need to register relevant dns A record Or use public ip address in server name. Allow tcp port 5222 access from internet.

e.g

dns for chat.linuxreaders.com

I registered ip address x.x.x.x in linuxreaders.com domain (A record).

firewall changes.

All you need is tcp 5222 accessible from Internet.

Allow tcp 5222 on x.x.x.x & NAT it to your local server ip (192.168.1.1)

It is not mandatory to use Spark as client, you can use any client application which supports XMPP. e.g pidgin, empathy.

Openfire Messenger Server is a post from: LinuxReaders

Related posts:

1. DHCP Server on Centos
2. DNS Server on CentOS
3. NTP Server on CentOS