How to Dig server1.example.com. Resolve to successfully through DNS where DNS server is 172.24.254.254.

Go to your Redhat CLI and type the following commands...

#vi /etc/resolve.conf
nameserver 172.24.254.254
#dig server1.example.com
#host server1.example.com

DNS is the Domain Name System, which mantain a database that can help your computer translate domain names such as www.computerfix.blogspot.com to IP addresses such as 216.148.218.197. As no individual DNS server is large enough to keep a database for the entire Internet, they can refer to other DNS server.
DNS is based on the named daemon , which is build on the BIND (Berkeley Internet Name Domain) package developed through the Internet software consortium.

Users want to access by name so DNS will  interpret the name into IP address. You need to specify the Address if DNS server in each and every client machine. In Redhat Enterprise Linux, you need to specify the DNS server into /etc/resolv.conf file.

After specifying the DNS server address, you can verify using host, dig and nslookup commands.

Creating password in a Folder and make it Private.

While the steps below will guide you in creating a hidden and password protected folder, this method is not 100% secure. It will deter the average computer user enough, but an advanced user will be able to access the contents of this folder.

1. Create a new folder and name it whatever you would like.


2. Open the folder, right-click on a blank area in it, then select New -> Text Document from the pop-up menu.


3. Open the text file you just created by double-clicking it and copy/paste in the following text:

   cls
   @ECHO OFF
   title Folder Private
   if EXIST "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" goto UNLOCK
   if NOT EXIST Private goto MDLOCKER
   :CONFIRM
   echo Are you sure you want to lock the folder(Y/N)
   set/p "cho=>"
   if %cho%==Y goto LOCK
   if %cho%==y goto LOCK
   if %cho%==n goto END
   if %cho%==N goto END
   echo Invalid choice.
   goto CONFIRM
   :LOCK
   ren Private "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
   attrib +h +s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
   echo Folder locked
   goto End
   :UNLOCK
   echo Enter password to unlock folder
   set/p "pass=>"
   if NOT %pass%== PASSWORD_GOES_HERE goto FAIL
   attrib -h -s "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}"
   ren "Control Panel.{21EC2020-3AEA-1069-A2DD-08002B30309D}" Private
   echo Folder Unlocked successfully
   goto End
   :FAIL
   echo Invalid password
   goto end
   :MDLOCKER
   md Private
   echo Private created successfully
   goto End
   :End

4. In the above code, replace the key PASSWORD_GOES_HERE with the password you want to use to unlock the folder. For example if you want the password to be 123456, the line should look like:

   if NOT %pass%== 123456 goto FAIL

5. Save your new file in the .bat format with the complete file name being locker.bat. To do this, make sure to change the Save as type: to All Files (*.*).




6. In the folder you created back in Step #1, double click the locker.bat file and there will now be a new folder named Private where you can put anything you want.


7. Upon exiting, double click the locker.bat file again. It will prompt you to answer whether you want to lock your folder or not. Press Y and the private folder will disappear.




8. In order to retrieve the Private folder, all you have to do is double click the locker.bat file and enter the password which you set in Step #4 and the folder will appear again for you to access.




9. That’s it!