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Bash: fix $? (#296)

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Rico Sta. Cruz 2017-12-10 19:52:09 +08:00
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bash.md
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@ -610,9 +610,9 @@ echo $ans
read -n 1 ans # Just one character
```
### Process IDs
### Special variables
| `$?` | PID of last foreground task |
| `$?` | Exit status of last task |
| `$!` | PID of last background task |
| `$$` | PID of shell |