add others

sort a file by column and keep the original order
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onceupon 2018-05-31 16:31:27 +08:00 committed by GitHub
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@ -2566,5 +2566,9 @@ echo "00110010101110001101" | fold -w4
#1000
#1101
```
##### sort a file by column and keep the original order
```bash
sort -k3,3 -s
```
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