How to write into a Log file from the batch file?
Using > and >> outputs to a file.
eg
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.