I'm having trouble finding these commands to run in a batch file?

Question

I want a batch file to pull information from the first line of a text file (notepad), use that information to add information to a DNS server, and then delete it. I'm thinking if I create a loop, I can make it go all the way through the text file, using the first line of information to add to the DNS server and then deleting the first line before starting a loop. For example... The batch file would be

@echo off
:start
dnscmd "mydns" /zoneadd (need to know the command from here to add the FQDN from the text file)
::(Need to know the command here to delete the first line of the text file and save the file)
goto start 

The text file reads

Siteno1.com
Siteno2.com
Siteno3.com

So I want it to add Siteno1.com to the dns, then delete it, start at the beginning of the text file, and add Siteno2.com to the dns, delete it, and start from the beginning again until the text file is empty.

Answer 1

There's no built-in primitive in CMD.EXE to delete lines from text files. I suspect you'd find utility in the for command.

@echo off
for /f %%i in (textfile.txt) do echo dmscmd "mydns" /zoneadd %%i

That will iterate thru all the lines in textfile.txt displaying the example dnscmd command-line for each line of the file. (Obviously, remove the echo to have it actually execute commands).

The syntax for for is somewhat arcane. When you use for at a bare command-prompt you don't double %% the environment variables. I find for to be incredibly handy and use it on a daily basis (but, then, I'm also at the command-prompt on a daily basis, too).