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   $ bash "$d_bin"'virus/virus - clamscan.sh'  - clam virus scan of specified [drives, directories]
   initial setup [header, environmental variables (enVars)]
   clam_it  - clamscan virus protection of all disks
   clam_special      #() clamscan virus protection with specific conditions
   clam_its      #() uncomment dirs to select which to clamscan
   diff_it      #() produce a list of FOUND detections in p_current that are NOT in historical list