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add grep

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Grep lines not begin with string (e.g. #)
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onceupon 2017-11-29 16:31:10 +08:00 committed by GitHub
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@ -47,6 +47,12 @@ grep -o '[0-9]*'
grep -v bbo filename
```
##### Grep lines not begin with string (e.g. #)
```bash
grep -v '^#' file.txt
```
##### Grep variables with space within it (e.g. bbo="some strings")
```bash