Following the instructions on the Rakudo how-to-get-rakudo page, I ran ./perl hello & hello.pl As I had not yet written hello, perl6 objected as follows:
$ ./perl6 hello Unable to open filehandle from path 'hello' current instr.: 'perl6;PCT;HLLCompiler;evalfiles' pc 1099756 ((unknown file):-1) called from Sub 'perl6;PCT;HLLCompiler;evalfiles' pc 1292 (src/PCT/HLLCompiler.pir:704) called from Sub 'perl6;PCT;HLLCompiler;command_line' pc 1513 (src/PCT/HLLCompiler.pir:813) called from Sub 'perl6;Perl6;Compiler;main' pc 271599 (src/gen_actions.pir:24108) The error message and its handling could be tidier.