It is hard to provide specific help because you did not show us the contents of your input file, or a small sample of your output or error messages.

You should check the status of your system call.

If your input file contains the string "foo", do you really have a command called "fingerfoo"? Perhaps you really meant (without the extra $_): 

system("finger $_");

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In reply to Re: Last logon and time for a system console by toolic
in thread Last logon and time for a system console by Anonymous Monk

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