mv ~/.npmrc ~/.npmrc.old npm prefix -g

To execute the given command in ActionScript, you can use the fscommand function. Here's an example:

fscommand("exec", "mv ~/.npmrc ~/.npmrc.old npm prefix -g");

This code will execute the command mv ~/.npmrc ~/.npmrc.old npm prefix -g in the shell. The ~/.npmrc file will be moved to ~/.npmrc.old, and the npm prefix -g command will be executed.

Please note that the fscommand function is specific to Adobe Flash Player and may not work in other ActionScript environments.

I hope this helps!