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| — | grep [2014/03/28 22:35] (current) – created - external edit 127.0.0.1 | ||
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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 | ||
| + | |||
| + | < | ||
| + | cat filelist | grep -xq string | ||
| + | </ | ||
| + | |||
| + | == Return line number == | ||
| + | |||
| + | < | ||
| + | cat filelist -n string | ||
| + | </ | ||
