Peter Postma a écrit :

>Eh actually no, matthew green just pointed out that /usr might be on nfs
>and when that's the case /usr is not available.  Seems that I've to create
>a script that doesn't use awk and grep.
>
>  
>
Wouldn't ifconfig down be better? it doesn't require grep/awk/whatever 
and it doesn't force running pf/ipf soon enough.