More precisely, I want all logger.info/debug/etc messages to be shown only in *.log file, but not in console window. Thanks.
UPD:
I dont want suppress all of console output, E.g. I want use letters gem to put my own output to console, also I want to use debugger which wont work with stdout redirected to /dev/null. I just want rails do not output Rails.logger messages to stdout (requests, ActiveRecord SQL queries, etc), Actually I can see such messages in log-file if needed.