Also,  /.*rrd$/ will match both of the strings  "rrd" and  "rrd\n" so perhaps you should use  /.*rrd\z/ instead.

Or perhaps even:  'rrd' eq substr( $_, -3 )

In reply to Re^3: Resizing MRTG (RRDTool) logs en-masse by jwkrahn
in thread Resizing MRTG (RRDTool) logs en-masse by McDarren

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