The syntax to use the navx command line tool within the Terminal in Mac OS X is as follows:

navx [OPTION]...[FILE]...

At its most simple, you can use navx along with a path to the file or folder you wish to scan at the command line. There are also a handful of command line options you can use:

-a (report all files scanned)
-c (scan inside compressed files)
-h (report files that were inaccessible for scanning)
-Q (quarantine files that can't be repaired)
-r (do not repair infected files [invalidates -Q])
-v (display the version number)
-o file (append output to file)

Sample usage: to scan files on the Administrator's desktop, report all these files and send the output to a file called report.txt:

navx -a -o report.txt /Users/Administrator/Desktop
 

To scan the current directory, include a space and a period (.) at the end of the command line:

navx -a -o report.txt .