Are you looking for something like? 
for $i (1..100) {
    system( "mv /folder$i/abc.txt /folder$i/folder$i.txt" );
}

[download]
I run under win7, so I have not tested it. If you want to search for files you need File::Find.
For every complex problem there is an answer that is clear, simple, and wrong. H. L. Mencken

In reply to Re: Rename multiple files following their directories' name by hdb
in thread Rename multiple files following their directories' name by pi3142

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