Telnet client: Windows 2008 R2, 2012 Server, Windows 7, Windows 8, Vista

FREQUENTLY ASKED QUESTIONS (Windows)
Q: How to enable telnet command in Windows 2008 R2 server?

C:\Users\Administrator>telnet
"telnet" is not recognized as internal or external command,
operable program or batch file.
By default telnet is not preinstalled in Windows 2008 R2, Windows 2012 Server, Windows 7, Windows 8 and Windows Vista. You can install the telnet client with the command below

Applies to: Windows7, Windows Vista, Windows XP, Windows 2003, Windows 2008 R2 Server, Windows 8.
Install Telnet client using command line
C:\Users\Administrator>pkgmgr /iu:"TelnetClient"
Done, now wait for few seconds and try with "telnet" commands.... 

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Explain Windows Registry Hives: Windows Registry Tutorial

      Windows system registry is the database of all the settings, configurations and preference of all installed applications, user accounts, hardwares and overall settings in the operating system. Registry also contains the settings and preferences of each user account in the operating system. Whenever we make a change in the operating system like installation or uninstillation of softwares, modifying control pannel setings, system policies, user preferences, all the changes are also stored in the system registry.

      You can modify or edit registry by using any registry editor tools (eg: regedit). Go to "Run" and type "regedit" and you can get access to Windows Registry. You should have an administrator previleged user account to modify windows registry. And before modifying registry values and entries i strongly recommend to take a backup of current windows registry data.

Windows registry branches
The five main branches of windows registry are HKEY_CLASSES_ROOT, HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE, HKEY_USERS, HKEY_CURRENT_CONFIG.

HKEY_CLASSES_ROOT
Contains information about all the file extension association maping for supporting grag and drop feature. Also contains preferences about Programatic identifier,Class ID, Interface ID, Windows user interface, etc.

HKEY_CURRENT_USER
Contains the informations about user profile of current logged in user. Including Logon names, Start menu settings, personalised settings, desktop settings, etc.

HKEY_LOCAL_MACHINE
Contains the information about softwares and hardwares. Including Hardware profiles, hardware device drivers, system RAM, start-up parameters, etc.

HKEY_USERS
Includes the user specific data like preferences of each user in the system.

HKEY_CURRENT_CONFIG
Stores the current using hardware profiles in the system. 

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Add static routes in Windows

Steps to add static routes in windows
This post will help you to manage multiple gateways in a PC. Eg: if you have two gateways 10.6.10.1 and 10.6.10.20. And you need to add static route to a diffrent network 192.169.10.0/255.255.255.0. through gateway 10.6.10.20.


Steps to followStep1: Login as Administrator and add all required gateways to NIC settings (use automatic metric)


Step2: run command prompt (or run as administrator in a normal user account)


Step3: To display the current route table.
C:\>route print
(verify the gateways added in step 1 is displayed in Gateway column)


Step4:add route to destnation network(192.168.10.0 255.255.255.0) through gateway 10.6.10.20
follow below format:
C:\>route<space>add<space><destination n/w><space>mask<space><destination n/w mask><space><gateway>
eg: route add 192.168.10.0 mask 255.255.255.0 10.6.10.20


Step5: To verify the added route in routing table
C:\>route print
Done, now connect to your destination network...

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