I’m not sure if this is what you’re looking for, sorry…
sudo -i /usr/lib/nagios/plugins/check_linux_memory:
/usr/lib/nagios/plugins/check_linux_memory: Zeile 7: Syntaxfehler beim unerwarteten Wort `newline'
/usr/lib/nagios/plugins/check_linux_memory: Zeile 7: `<!DOCTYPE html>'