Email Clients For Linux Users.

Email clients are applications that make it much easier to manage your email messages. Here are some open source options for email clients that are quite popular amongst Linux users.

1. Claws Mail
This is an email client that is based on GTK+ and features,

- Quick response
- Graceful, and sophisticated interface
- Easy configuration, intuitive operation
- Abundant features
- Extensibility
- Robustness and stability                                        

2. Thunderbird
Mozilla's free email application is perhaps the most popular amongst Linux users.

3. KMail
From the website: KMail is the email component of Kontact, the integrated personal information manager from KDE.

4. Balsa
Balsa is an e-mail client for GNOME, highly configurable and incorporating all the features you would expect in a robust mail client.

5. Sylpheed
This is a lightweight and easy-to-use email client that Linux users can try out.

6. Alpine
From the website: Alpine is a fast, easy to use email client that is suitable for both the inexperienced email user as well as for the most demanding of power users. Alpine is based on the Pine® Message System, which was also developed at the University of Washington. Alpine can be learned by exploration and the use of context-sensitive help. The user experience is highly customizable through the use of the Alpine Setup command.

7. Cone
From the website: Cone is a screen-oriented E-mail/News reader and writer. If you are reading this documentation from within Cone, you are actually reading the simplified HTML version of Cone's documentation that's formatted as a folder of E-mail messages. Each online tutorial chapter appears as a separate message. Use PgUp and PgDn to read each chapter. Press N and P to move to the next/previous chapter.

8. Pine
Pine stands for Program for Internet News and Email.

9. mutt
This is a text-based mail client that is based on the Unix operating system.

10. SquirrelMail
This is another email client that many Linux users love and use.

Open Source Tools for Windows System Admin

As a System Admin for Windows, here are your gears of war Here are 10 admin tools that come in handy for the same.

1. Wireshark

This is a free software-based protocol analyser, which is a very useful tool for Windows administrators. Many say that it makes network traffic analysis easier by many degrees.

2. AMANDA

This is a Windows-based tool that stands for Advanced Maryland Automatic Network Disk Archiver. It allows the administrator to create a master backup server, which can support both Windows-powered servers and desktops.

3. MailArchiva

Email archiving is front and center in Exchange 2010, thanks to the increase in compliance regulation enforcement across the industry. But for those who are not yet using Exchange 2010, MailArchiva provides a worthwhile means for bringing compliance to Exchange 2000/2003 and other mail servers, such as Postfix, Sendmail, Qmail, iMail, and Lotus Notes.

4. Exchange 2010 RBAC Manager

Exchange 2010 RBAC Manager is a great tool for admins working with role-based access control and Exchange. RBAC Manager (aka RBAC Editor GUI) helps overcome the lack of a GUI tool to work with the new role-based administration side to Exchange, enabling admins to connect, whether or not you're a PowerShell master. The tool is written in C# and uses PowerShell behind the scenes to allow you to create and manage roles in your Exchange 2010 environment.

5. Core Configurator 2.0 for Server Core

This is a command-line tool for Windows Server 2002 and Windows Server 2008 R2. 

6. AutoSPInstaller for SharePoint 2010

This tool makes use of a number of different scripts in order to install SharePoint and implements database names that are untouched in all of this process.

7. OCS Inventory

This tool helps you to locate the devices that are connected to your network and hardware and software that has been installed on your computer. You have to instal the OCS client inventory agent on your systems.

8. UltraDefrag

This is a defragmentation tool for Windows-based computers. It is updated continuously to ensure improvements in the performance.

9. Nmap for Windows

Yes, this used to be a Linux-only platform at one point of time. But just like it was for Linux, Nmap for windows is a very useful and important security resource fr Windows computers.

10. Zenmap

This tool can be used for mapping a topology of devices that have been connected to your network. It works on Nmap and provides a graphical user interface for the comman-line tool.

Tools For System And Network Admin

Are you a system administrator? If yes, then these tools will come in handy for you

System and Network Analysis: As an administrator, it is your job to monitor the system and network that you are presiding over. Analysis is an important part of being in the know of what's happening and when a particular action is required. That is where system and network analysis tools come in handy.

1. NTFS Permissions Explorer

2. Xirrus Wi-Fi Inspector

3. Whois

4. ShareEnum

5. PipeList

6. TcpView

7. The Dude

8. Microsoft Baseline Security Analyzer

9. WireShark

10. Look@LAN

11. RogueScanner

12. Capsa Free Network Analyzer

13. SuperScan

14. Blast

15. UDPFlood

16. IPplan

17. NetStumbler

18. PingPlotter

19. SolarWinds Free Permissions Analyzer for AD

20. Angry IP Scanner

21. FreePortMonitor

22. WirelessNetView

23. BluetoothView

24. Vision

25. Attacker

26. Total Network Monitor

27. IIS Logfile Analyser

28. ntop

System testing and troubleshooting: What's the next logical step after analysis your network? Of course, testing whether your analysis was right or wrong. To put it more clearly, as a system or network admin, it is one of your jobs to perform tests on your domain. These are the tools that let you do that.

29. Pinkie

30. VMWare Player

31. Oracle VirtualBox

32. ADInsight

33. Process Monitor

34. SpiceWorks Network Troubleshooting

35. RAMMap

36. Autoruns

37. LogFusion

38. Microsoft Log Parser

39. AppCrashView

40. RootKitRevealer

System and network management: These are tools that allow you to manage the network or system. In a way, they comprise of various tools that help an IT professional to manage a bunch of tasks or certain specific tasks.

41. Bitcricket IP Subnet Calculator

42. EMCO Remote Installer Starter

43. ManagePC

44. Pandora FMS

45. SNARE Audit and EventLog Management

46. OCS Inventory

47. Zenoss Core – Enterprise IT Monitoring

48. Unipress Free Help Desk

49. SysAidIT Free Help Desk

50. Cyberx Password Generator Pro

System and Network Management: These are tools that allow you to manage the network or system. In a way, they comprise of various tools that help an IT professional to manage a bunch of tasks or certain specific tasks.

51. KeePass Password Safe

52. TweakUAC

53. Microsoft Application Compatibility Toolkit

54. ExtraSpy Employee Monitor

55. NetWrix USB Blocker Freeware

56. FileZilla

57. Wake On Lan 2 .NET

58. Speccy

59. Active Directory Explorer (ADExplorer)

60. ADRestore

File and disk management: These are tools that allow you to perform various operations on your files. These include operations like de-duplication, copying, file comparison, merging, encryption, syncing, searching and renaming of files. These files can be invaluable additions to your arsenal as a system administrator.

61. Disk2vhd

62. Defraggler

63. PageDefrag

64. PsPad

65. MD5Summer

66. Universal Viewer

67. FreeCommander

68. Recuva

69. Steganos LockNote

70. Microsoft SyncToy

71. 7-Zip

72. PeaZip

73. Bacula

74. Areca Backup

75. DirSync Pro

76. Amanda Network Backup

77. WebSynchronizer

78. KGB Archiver

79. Iometer

80. Notepad++

Performance and availability monitoring: These tools allow you to monitor your system and network performance and monitor them for possible errors etc. They provide functions such as monitoring of memory utilisation, network utilisation, disk utilisation, CPU utilisation etc. In addition, you can also use the network monitoring tools in order to ensure that your network is performing at its optimal levels and is stable.

81. ManageEngine Free HyperV Performance Monitor

82. Nagios

83. ManageEngine Free Exchange Health Monitor

84. Kratos Exchange Monitor

85. ManageEngine Free Windows Health Monitor

86. ManageEngine Free Ping Tool

87. ManageEngine Free SQL Health Monitor Tool

88. ManageEngine Free VM Configuration Tool

89. Kratos Network Device Monitor

90. IxChariot QCheck

91. EasyNetMonitor

Remote management: As a system or network admin, you will be dealing with a lot of remote connections and clients. In order to manage this task efficiently, you need tools like the ones mentioned below. You can use them to remotely administer clients and servers, manage remote desktop sessions and various other functions.

92. Remote Desktop Manager

93. TightVNC

94. Microsoft RDCMan

95. Terminals

96. PsFile

All-in-one toolkits: Sometimes you do not want to use different tools for different purposes. You want tools that can manage multiple functionalities by themselves so that you don't have to switch over to a new one whenever your attention is needed in a new direction. These are all-in-one kits that fill up some of the gaps that exist in this respect.

97. Net Tools 5.0

98. ManageEngine Free Windows Tools 2

99. Axence NetTools Pro

100. Free IP Tools

101. PsTools

Open Source Backup Tools For Linux

There are different kinds of backup tools, which perform the same operating but in different ways and for different systems.

Experts have for a long time laid emphasis on backing up your system or network's data. The best way to ensure that you don't lose data is to use tools for creating backups.

Graphical User Interface (GUI): A graphical user interface always makes any task much easier than it would be otherwise. The same is applicable for tools that are used to backup your data in Linux.

1. Areca Backup

2. BackupPC

3. Bacula

4. fwbackups

5. Keep

6. Simple Backup Solution

Command-line: While GUIs do make the job easier, many Linux users still prefer to use the Command Line for as many tasks as possible. If you're such an user then these are the tools for you.

7. afbackup

8. AMANDA

9. Cedar Backup

10. Duplicity

11. Dump/restore

12. tar

Snapshot backups: In order to save time, some software create backups on a snapshot. This is a read-only copy of the data that can be used in order to restore lost information.

13. FlyBack

14. Time Vault

How to Install Python 2.7.6 on CentOS 6.5

CentOS 6.5 still come with Python 2.6 and I need 2.7, bellow a simple tutorial how to achieve this with no pain and not messing with installed Python.

How To Find IP Conflicts In Linux

This tool sends ARP (Address Resolution Protocol) packets on local network to collect the addresses. If there is multiple MAC addresses claiming the same IP address, then there is conflict.

To install arp-scan on Ubuntu or Debian type:

To install arp-scan on Ubuntu or Debian type:

$ sudo apt-get install arp-scan

For Fedora, CentOS or Redhat:

$ sudo yum install arp-scan

To detect IP conflicts, run the following:

$ sudo arp-scan –I eth0 -l

An output example:

192.168.1.10   00:1b:a9:63:a2:4c       BROTHER INDUSTRIES, LTD.
192.168.1.30   00:1e:8f:58:ec:49       CANON INC.
192.168.1.33   00:25:4b:1b:10:20       Apple, Inc
192.168.1.37   10:9a:dd:55:d7:95       Apple Inc
192.168.1.38   20:c9:d0:27:8d:56       (Unknown)
192.168.1.39   d4:85:64:4d:35:be       Hewlett Packard
192.168.1.39   00:0b:46:e4:8e:6d       Cisco (DUP: 2)
192.168.1.40   90:2b:34:18:59:c0       (Unknown)

In this instance, the 19.168.1.39 IP is in conflict since it appears twice.

Install Zabbix 2.2 (Network Monitoring Tool) on CentOS Redhat and Fedora

Zabbix is an open source software for networks and application monitoring. Zabbix provides agents to monitor remote hosts as well as Zabbix includes support for monitoring via SNMP, TCP and ICMP checks. Click here http://en.wikipedia.org/wiki/File:Zabbix.png to know more about zabbix.

This article will help you to step by step install Zabbix 2.2 Server on CentOS/RHEL 6/5 and Fedora Systems. Before starting installation read below basic requirements to run Zabbix 2.2.

• Apache: 1.3.12 or later.
• PHP: 5.3.0 or later.
• MySQL: 5.03 or later.
• OpenIPMI: Required for IPMI support.
• libssh2: Required for SSH support. Version 1.0 or higher.
• fping: Required for ICMP ping items.
• libcurl: Required for web monitoring.
• libiksemel: Required for Jabber support.
• net-snmp: Required for SNMP support.

Step 1: Set Up Apache, MySQL and PHP

In order to use Zabbix we required a Web Server, database server and PHP to work. In this steps we are going to setup these services, You many skip this step if you have already configured it.

Install All Services

# yum install httpd httpd-devel 
# yum install mysql mysql-server 
# yum install php php-cli php-common php-devel php-pear php-gd php-mbstring php-mysql php-xml

Start All Services

# service httpd start
# service mysqld start

MySQL Initial Setup

Run following command to setup mysql initially and secure it

# mysql_secure_installation

Step 2: Configure Yum Repository

Before installing Zabbix first configure zabbixzone rpm repository in our system using following commands.

CentOS/RHEL 6:
# rpm -Uvh http://repo.zabbix.com/zabbix/2.2/rhel/6/x86_64/zabbix-release-2.2-1.el6.noarch.rpm

CentOS/RHEL 5:
# rpm -Uvh http://repo.zabbix.com/zabbix/2.2/rhel/5/x86_64/zabbix-release-2.2-1.el5.noarch.rpm

Step 3: Install Zabbix Server with MySQL

Use following command to install Zabbix using mysql database.

# yum install zabbix-server-mysql zabbix-web-mysql zabbix-agent zabbix-java-gateway

Step 4: Setup Zabbix Apache Configuration

Zabbix creates its own apache configuration file /etc/httpd/conf.d/zabbix.conf. Edit this file and just update timezone. More timezone’s

    php_value date.timezone Asia/Kolkata

After changing value restart Apache service.

# service httpd restart

Step 4: Create Zabbix MySQL Database

This installation is using mysql as backend of zabbix, So we need to create MySQL database and User for zabbixinstallation.

# mysql -u root -p

mysql> CREATE DATABASE zabbix CHARACTER SET UTF8;
mysql> GRANT ALL PRIVILEGES on zabbix.* to 'zabbix'@'localhost' IDENTIFIED BY 'SECRET_PASSWORD';
mysql> FLUSH PRIVILEGES;
mysql> quit

After creating database restore the default mysql database provided by zabbix. These files can be found at/usr/share/doc/zabbix-server-mysql-2.2.2/create/ directory.

# mysql -u zabbix -p zabbix < /usr/share/doc/zabbix-server-mysql-2.2.2/create/schema.sql
# mysql -u zabbix -p zabbix < /usr/share/doc/zabbix-server-mysql-2.2.2/create/images.sql
# mysql -u zabbix -p zabbix < /usr/share/doc/zabbix-server-mysql-2.2.2/create/data.sql

Step 5: Start Zabbix Server

After completing above setup, let’s start Zabbix server using following command.

# service zabbix-server start

After starting zabbix service, lets go to Zabbix web installer and finish the installation.

Step 5: Start Zabbix Web Installer

Zabbix web installer can be access using following url, Change FQDN as per you setup.

http://svr1.tecadmin.net/zabbix/setup.php

and follow the steps as per given screen shots below.

Zabbix Setup Welcome Screen

This is welcome screen of zabbix web installer. Go forward by click on next button.

Check for pre-requisities

Check if your system have all required packages, if everything is ok click next.

Configure DB Connection

Enter database details created in Step #4 and click Test Connection. If database connection is correct, it will show ok message. After that click next.

Zabbix Server Details

Pre-Installation Summary

This step will show the summary you have entered previous steps, so simply click next.

Install Zabbix

Zabbix Login Screen

Login to Zabbix using below default credentials.

   Username: admin
   Password: zabbix

How Set Static IP Address In Ubuntu

root@vik:~# vi /etc/network/interfaces

#This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback


# The primary network interface
auto eth0

# make it comment
# iface eth0 inet dhcp

# add these lines
iface eth0 inet static
address 192.168.1.30                                              # define IP address
network 192.168.1.1                                               # define network address
netmask 255.255.255.0                                           # define subnet mask
network 192.168.1.1                                               # define network address
gateway 192.168.1.1                                               # define default gateway
dns-nameservers 192.1.168.10                                # define name server

Now Save and Exit file with press Esc. wq!

root@vik:~# ifdown eth0 && ifup eth0 


Disable IPv6 if not needed.



root@vik:~# echo "net.ipv6.conf.all.disable_ipv6 = 1" >> /etc/sysctl.conf 
root@vik:~# reboot
root@vik:~# ifconfig 

Koha Live DVD

Koha Live DVD is based on Ubuntu Linux and Koha 3.x. Live DVD customised for ready to use. Highlights are: 

• Easy installation steps
• Koha customised for ready to use
• Zebra server enabled
• Customised MARC fields in cataloguing
• Webmin included for scheduling database backup
• Build on Ubuntu 10.04 LTS
• Detailed installation manual and Read Me file
• Sample reports

Read installation manual and Read me file before try to install the DVD.

https://sourceforge.net/projects/kohalivedvd/files/

Easy to upgrade to new version of Koha.

Following commands will upgrade Koha to new version.

• sudo apt-get update
• sudo apt-get upgrade
• apt-get install koha-common

No need to execute lot of commands.

Mist Server Installation on Ubuntu 12.04

MistServer is a highly versatile, lightweight, customizable open-source multi-standard multimedia server. MistServer configuration is easy to use for full CDN solutions applications.

MistServer is Free, open and well-supported, Truly plug and play, Affordable, seamless and highly scalable control over your media servers. MistServer can be installed on any server to make multimedia server.

Download MistServer Binary here http://www.mistserver.org/index.php?title=Downloads

You can clone source from https://github.com/DDVTECH/

Check your server architecture Generic Linux 64-bit or Generic Linux 32-bit then download

# wget http://releases.ddvtech.com/download.php?pack=mistserver_64&ver=1.2.1

Now extract / copy files to /usr/local/bin/

Check quick start here http://www.mistserver.org/index.php?title=Quick_Start

# chmod a+x MistController
# MistController -a username:password -n

You need to point your browser to connect Mist Server Manager

http://server-ip:4242/#root@http://server-ip:4242/api

Kill MistServer

# lsof -i:4242 (Find PID for MistServer)
# kill -9 PID

Find more info about MistServer from http://wiki.mistserver.org/

Compare MistServer with other Media Streaming Servers like Wowza or Red5 here http://www.mistserver.org/index.php?title=Compare

You can find Linux User Guide for MistServer from http://mistserver.org/index.php?title=User_Guide_(Linux)