That's not a perl problem anymore, I'll try anyway...

Probably the user nobody has the program /usr/sbin/nologin as its login shell, which prints the message you have quoted and then exits.

Possible solutions are (1) use sudo as I suggested, not su (2) convince su not to spawn a login shell (no - in the command line) or (3) give the user nobody a different login shell.

In reply to Re^3: How to run a perl script under "nobody" user? by moritz
in thread How to run a perl script under "nobody" user? by sunshine_august

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