-b batchfile
             Batch mode reads a series of commands from an input batchfile instead of stdin.  Since it lacks user interaction it should
             be used in conjunction with non-interactive authentication.  A batchfile of "-" may be used to indicate standard input.
             sftp will abort if any of the following commands fail: get, put, rename, ln, rm, mkdir, chdir, ls, lchdir, chmod, chown,
             chgrp, lpwd, df, and lmkdir.  Termination on error can be suppressed on a command by command basis by prefixing the command 
             with a "-" character (for example, -rm /tmp/blah*).