batch-filewindowswindows-command-prompt
I have a text file with a list of server names (servers.txt) that looks something like this:
server1
server2
server3
I have a feeling this can be done with the FOR command as I use that to perform an action on each name in the file, but I'm not quite sure how to use the delimiters to accomplish this.
for /F "tokens=*" %%G in (servers.txt) do (
SET machinenum = <magic here>
ECHO %machinenum%
)
expected output
01
02
03
Here's a batch file for you:
@echo off
rem Loop thru list of computer names specified on command-line
for /f %%i in (%1) do call :check_machine %%i
goto end
:check_machine
rem Check to see if machine is up.
ping -n 2 %1 >NUL 2>NUL
if errorlevel 1 goto down
rem Reverse-lookup machine name and report
for /f "usebackq tokens=2" %%d in (`ping -n 1 -a %1 ^| find "Pinging"`) do echo %1:Up:%%d
goto end
:down
rem Report machine down
echo %1:Down
:end
Pass it a text file with a list of computer names in it and it'll PING them (2 tries-- you can increase that by increasing the number after "-n" on the 1st PING command-line), and if it gets a response, perform a reverse-lookup of the name. It returns results as:
computer-name-1:Up:name-it-resolved-to
computer-name-2:Down
computer-name-3:Up:name-it-resolved-to
...
To run multiple in parallel, just make multiple text files w/ different lists of machine names and launch a few copies in parallel.
Quick and dirty saves the day.
Best Answer
Here's how you would do it in your example. Make the token larger (1-8) for however many servers you have. If you don't know how many servers you'll have, it would be a lot easier to put each server on it's own line.
If this is an actual batch file, use the double %%. If it's from the command line, use a single %