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add loop

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onceupon
2017-01-05 15:44:41 +08:00
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commit 51ed9e01c9
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@ -713,6 +713,16 @@ if [[$age >21]]
```
//[[ ]] use for comparison
#####test if file exist
```bash
if [ -e $DF ]
then
echo -e “file exists!|”
fi
```
#####for loop
```bash