[R] behaviour of Sys.getenv changed after upgrade from 1.3.0 to R1.3.1 debian

[Marcus Eger]

Sorry - -
there seems to have been a change from debian 2.2 to 3.0 (unstable): 
HOSTNAME used to be an environment variable, but has changed to be a shell 
variable now....
Thanks for the hint.
  M. Eger

> Are you sure they are both environment variables?  The echo command
> will echo either an environment variable or a shell variable.
>
> Try
>
> system("export")
>
> to see what is in the environment.

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