My assumption is if the shebang is not mandatory for pm files in Linux (because pm files are not meant to be executed from command line), then I guess the file's permissions can be 644. They are not required to be 755.

Yes. For cheap thrills, I ran these commands on my recently installed perl 5.38 on Ubuntu: 

~/localperl$ find . -name '*.pm' -ls >pm.tmp
~/localperl$ find . -name '*.pl' -ls >pl.tmp

[download]

All the .pm files have permissions like this: 

-r--r--r--   ... ./lib/5.38.0/Carp.pm

[download]

The perl commands in the bin directory designed to be run as commands have permissions like this example of the prove command: 

-rwxr-xr-x  ... prove

[download]

These text files also tend to start with a shebang line like: 

#!/home/youruser/localperl/bin/perl

[download]

There are also plenty of .pl files lying around with permissions like this: 

-r--r--r-- ... somefile.pl

[download]
which is fine because you can still run them manually via: 
perl /somepath/somefile.pl

[download]

In reply to Re^3: Writing my first module by eyepopslikeamosquito
in thread Writing my first module by harangzsolt33

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