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#!/bin/sh
prog=`basename $0`
...
ssh -l $RUSER $RH "sh -c \"if [ ! -d .ssh ]; then mkdir .ssh; fi && cd
+ .ssh && if [ -e authorized_keys ] ; then cat >> authorized_keys; els
+e cat > authorized_keys; fi \"" < id_dsa.pub

ssh $RUSER@$RH hostname