You can probably achieve this easily with 'sed' on bash.
> On 28 Jan 2016, at 09:37, Frank Larry <frankylarry2...@gmail.com> wrote: > > Hi Team, > > could you please let me? i have a file which contains "Debug", i would like > to replace debug to "Error", when i ran the below program the out showing > Error message but how to save the output with new changes. Could you please > tell me how to fix it? > > open(FILE, "<filter.txt") or die "Can’t open $!\n"; > > while($line = <FILE>){ > print "Before substituting: ", $line ,"\n"; > $line =~ s/Debug/Error/g; > print "After substituting : ", $line , "\n"; > > } > > close(FILE); > > > -Franky