perl -pi.bak -e'BEGIN{$testname="whatever"} s!([^/]+\.data)\b!$testname/$1!g' output.txt That will make the substitutions into output.txt which is backed up in a file called output.txt.bak.

[Update: edited for thinko, VSarkiss++]

After Compline,
Zaxo

In reply to Re: how to replace ocurence of string with other string by Zaxo
in thread ho w to replace a occurence of string by other string by Anonymous Monk

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