When I run it there is no output.
Same for me, if I point to a file which is static. However, I do get output if I point to a file which I know is currently growing in size (similar to tail -f).

Here is a quote from the File::Tail POD (emphasis mine):

File::Tail - Perl extension for reading from continously updated files

In reply to Re: I can't get the sample code for File::Tail to read my file by toolic
in thread I can't get the sample code for File::Tail to read my file by markseger

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