I am trying to pass special characters in arguments via check_nrpe to an nrpe_nt server: /usr/lib/nagios/plugins/check_nrpe -H 10.0.1.127 -c get_service_auth -a 10.0.1.5 msdtc 'jomama' 'foo!bar' This isn't working. The shell doesn't like it when I use double quotes and nrpe doesnt pass the ! when I use single quotes. Any ideas?