@@ -238,9 +238,9 @@ commands using a base image that does not contain `/bin/sh`.

 > **Note**:

 > Unlike the *shell* form, the *exec* form does not invoke a command shell.

 > This means that normal shell processing does not happen. For example,

-> `CMD [ "echo", "$HOME" ]` will not do variable substitution on `$HOME`.

+> `RUN [ "echo", "$HOME" ]` will not do variable substitution on `$HOME`.

 > If you want shell processing then either use the *shell* form or execute 

-> a shell directly, for example: `CMD [ "sh", "-c", "echo", "$HOME" ]`.

+> a shell directly, for example: `RUN [ "sh", "-c", "echo", "$HOME" ]`.

 The cache for `RUN` instructions isn't invalidated automatically during

 the next build. The cache for an instruction like