Lookup variable value from string in shell script

Question

In bash, if I have: ``` y=10 x='y' echo $x # prints 'y' ``` Now I want to get `$y` via $x: ``` echo ${$x} # error: "bad substitution"; I want to print 10 ``` How do I lookup the variable value with name `$x`?

Accepted Answer

See Parameter Expansion in bash manual:

```
echo ${!x}
```

Lookup variable value from string in shell script

Solution

Problem