Re: [Help-bash] taking the name of a variable from another variable

[João Eiras]

On 3 July 2018 at 14:09, Robert Durkacz <address@hidden> wrote:
> How could I write a shell script that takes two arguments, the first to be
> interpreted as the name of an environment variable and the second to be the
> value of that variable? All the script should do is create an environment
> variable with that value.
>
> Whatever I try, I cannot get the shell to evaluate some expression and use
> the result as a variable name. Thus for instance
>    varvar=var
>    $varvar=val
> results in
>    var=val: command not found
>
> In other words, can I obtain the name of a name of a variable from another
> variable?

Example:

some_variable="hello world"
another_text="goodbye world"
my_variable_name=some_variable

# Read variable
echo ${!my_variable_name}
# Assign variable
eval "$my_variable_name=\"\$another_text\""
# Read variable again
echo ${!my_variable_name}

More:
http://tldp.org/LDP/abs/html/ivr.html