linux - Can I use grep to find a file including a particular string? -

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can use grep find file including particular string? example, find file containing "abc" without knowing file name.

grep -l "abc" *

if want recursive ,

grep -r -l "abc" *

if have ruby(1.9+)

dir["**/*"].each |file|   if test(?f,file)    open(file).each |line|      if line[/abc/]        puts "line: #{line}"        puts "file: #{file}"      end    end   end end

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