echo foo>foo; echo bar>bar; perl -e 'rename("foo","bar")' works perfectly fine on Linux. But I don't get why you wanted me to test it, when I know what I'm talking about and I knew it would work ahead of time (but I did test again anyway just to make sure I don't look like a fool), whereas if you had read up on the subject and tested before posting you might have learned something that it seems you didn't know before.

In reply to Re^8: Read in hostfile, modify, output by Anonymous Monk
in thread Read in hostfile, modify, output by razmeth

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