In Windows when I run an executalbe from command line, for example, abc.exe -i abc.bmp >output.txt, all the output of the program will be put in the text file. However, all the previous contents in the text file will also be destroyed. So if I run the following commands sequentially,
abc.exe -i abc.bmp >output.txt abc.exe -i def.bmp >output.txt
Only the information when running the second file will be kept in output.txt. So my question is how I can also keep the previous information in the txt file.
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Answer
Use >> to append to a file.
abc.exe -i abc.bmp >output.txt abc.exe -i def.bmp >>output.txt
The first line will create or clear the file. The second line will append to it.