discarding err and output in bash

Question

I am trying to write a password cracker for cracking password locked pdf. I have 4 for loops too iterate through all the possible 4 char passwords. I have a command that gives out error messages if the password is wrong. presently i redirect the error and output to a temporary file and delete the file after every check. This consumes a lot of time and is making the script slower. If anyone could suggest me a better idea or redirection that would be helpful.

Thanks in Advance Harsha

Answer 1

You can do like this:

command > /dev/null 2>&1

To redirect stdout and stderr to /dev/null thus discarding the standard output and standard error completely.