If you don’t already have OpenVAS installed, click here if you need help installing OpenVAS 8 on Ubuntu 14.04, or click here if you need help installing OpenVAS 7 on CentOS 7. If you have installed OpenVAS 8 (or an older version), you might have noticed some of these peculiar errors in your scan reports.
Vulnerability Detection Result Arachni could not be found in your system path. OpenVAS was unable to execute Arachni and to perform the scan you requested. Please make sure that Arachni is installed and that arachni is available in the PATH variable defined for your environment.
Vulnerability Detection Result Nikto could not be found in your system path. OpenVAS was unable to execute Nikto and to perform the scan you requested. Please make sure that Nikto is installed and that nikto.pl or nikto is available in the PATH variable defined for your environment.