Batch file to copy last line of several files into one new file

I have a load of logs being generated eac开发者_运维问答h time an app runs, I want the very last line of each to be collated into a file or printed on screen by a batch file. e.g I have a dir with files like log123.log,log124.log,log125.log

That can indeed be done with a Windows batch file, using a for loop to count the lines:

@echo off
for %%f in (*.log) do (
    set /a line_count = -1
    for /f %%l in (%%f) do set /a line_count += 1
    more +%line_count% %%f
)

If your files do not end with a newline character, you'll have to initialize the line_count variable to 0 instead of -1.

You can redirect more's output to append the results to a file:

more +%line_count% %%f >> your_results_file