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add grep

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onceupon 2016-09-05 15:26:20 +08:00 committed by GitHub
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@ -120,6 +120,16 @@ if [ $? -eq 0 ]; then echo 'found'; fi
//grep -q will output 0 if match found //grep -q will output 0 if match found
//remember to add space between []! //remember to add space between []!
#####grep strings between a bracket()
```bash
grep -oP '\(\K[^\)]+'
```
#####grep number of characters with known strings in between(e.g. AAEL000001-RA)
```bash
grep -o -w "\w\{10\}\-R\w\{1\}"
```
// \w word character [0-9a-zA-Z_] \W not word character
##Sed ##Sed