如何使用AWS Data Pipeline ShellCommandActivity在csv上运行“cut”命令

Using AWS Data Pipeline ShellCommandActivity, I'm trying to run some pre-processing on a file that has way more columns in it than I want using the "cut" command to extract just the columns I want. I seem to be able to "grep" the file to an output file successfully. Whenever I try "cut", I get an empty file as output.Using AWS Data Pipeline ShellCommandActivity, I