Kind of. The files need to be executable and need to have a valid Shebang. That was a common issue with Perl when developers uploaded from Windows, because the

Kind of. The files need to be executable and need to have a valid Shebang. That was a common issue with Perl when developers uploaded from Windows, because the Shebang was now "/usr/bin/perl\r". ASCII mode FTP mitigated that, but was itself a terrible idea. Passing flags to Perl ("/usr/bin/perl -w") or putting env into it ("/usr/bin/env perl") usually helped. Chmod'ing over FTP isn't straight forward in most clients, so it was much more complicated for beginners to get things to run than "upload those files, go to your browser".