"telnet" is not recognized as internal or external command, operable program or batch file

In latest windows operating systems like Windows 2008 Server, 2012 Server, Windows 8, Windows 7, etc "telnet" is not preinstalled with windows, so you need to install the telnet client manually.

Installing Telnet Client in Windows Server 2008 R2, 2012 server.
"Start" -> "Administrative Tools" -> "Server Manager" -> "Features" -> and click "Add Features" -> select "Telnet client" and click "Next" -> "Install".

Installing Telnet Client on Windows using commands
The below command will install and enable telnet client in windows operating systems.
C:\Users\Administrator>pkgmgr /iu:"TelnetClient"

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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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Print all File names in a folder to a text file (For Linux and Windows)

FREQUENTLY ASKED QUESTIONS (Linux)
Q. How can i print the file names of a folder into a text file.?
Q. How to print the dir/ls command output to a text file?

You can copy all file names in a folder/directory to a text file with the help of command prompt in windows and with command terminal in linux systems.

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After running the command, the output will write to a text file and save to current directory. The command is same for Linux and windows.

In Windows Operating systems(Windows 7,8, XP, Vista, 2008))
Open command prompt and run the below command
Command Usage:
C:\>dir <folder> >filename.txt
Example:
C:\>dir d:\Files\ >filename.txt

In Linux Operating systems(Redhat, CentOS, Fedora, Ubuntu, etc)
Open terminal and run the below command
Command Usage:
# ls > filename.txt
Example:
# ls /home/admin/ > contents.txt

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