How to write into a Log file from the batch file

batch filecommand line

I have a batch file that triggers process in Access database. I'd like to write into a log file (just some *.txt file saved in the same folder) time when before the process started and after it was finished.
Is there a command for that?
Thank you in advance

Best Answer

Using > and >> outputs to a file.

echo Hello World > hi.txt

Will result in a file called hi.txt containing the string "Hello World"

echo How are you >> hi.txt

Will add the line "How are you" to the end of hi.txt

This works on both Windows and Unix based OS. (Linux, Mac OS...)

On windows, using %TIME% or %DATE% in the echo string will output time/date as part of the string.

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Windows – Dump contents of a cmd prompt into a file, from a batch file

You just need to add this to the end of whatever runs the batch file: > "c:\yourFile.txt"

(or >> "c:\yourFile.txt" if you want the results appended to the file without overwriting)

eg: c:\yourBatchFile.bat >> c:\yourLogFile.txt

Windows – Batch file to write ping results to a text file

If you want the timestamp in the file too, you'd need to put:

time /T >> filename.txt

In the first example you quoted:

@ECHO OFF
:LOOPSTART
time /T >> filename.txt
ping xxx.xxx.xxx.xxx -n 4 >> filename.txt
ping yyy.yyy.yyy.yyy -n 4 >> filename.txt
sleep -m 3000
GOTO LOOPSTART

You can play around with the following code to give you a more configurable timestamp:

set time_hh=%time:~0,2%
if %time_hh% lss 10 (set time_hh=0%time:~1,1%)
set time_mn=%time:~3,2%
set time_ss=%time:~6,2%
set time_ms=%time:~9,2%

echo %time_hh%:%time_mn%:%time_ss%.%time_ms% >> filename.txt

Put all of this in place of the time /t... line

Best Answer

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Windows – Dump contents of a cmd prompt into a file, from a batch file

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