Presumably you'd need to do more than sign/check the script running as the argument though? For example: #!/usr/bin/perl use module; print "OK\

Presumably you'd need to do more than sign/check the script running as the argument though? For example: #!/usr/bin/perl use module; print "OK\n"; The module could have been modified by a local user too - so you need to check all libraries that are included/opened too? That would seem to be a lot of work.