[estats] regenerate ssh host keys for estats-{2..12} so that each node has a different one.
for d in 172.16.121.{2..12}; do
rm $d/*
for t in ecdsa ed25519 rsa; do
ssh-keygen -t $t -f $d/ssh_host_${t}_key -N "" -C "estats-${d##*.}.toulouse.grid5000.fr"
done
done