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grep [2014/03/28 16:35] (current)
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 +====== grep ======
  
 +  * [[ack]]
 +  * [[sed]]
 +
 +  * **-x** - Select only those matches that exactly match the whole line.
 +
 +== Check if a line exists ==
 +
 +Returns 0 or 1 exit codes
 +
 +<​code>​
 +cat filelist | grep -xq string
 +</​code>​
 +
 +== Return line number ==
 +
 +<​code>​
 +cat filelist -n string
 +</​code>​