echo `date`" $computer: Backing up $computer" >&2
# Try to SSH to the computer without entering a password.
-if ! `ssh -n -o NumberOfPasswordPrompts=0 root@$computer /bin/true`; then
+if ! ssh -n -o NumberOfPasswordPrompts=0 root@$computer /bin/true; then
diemsg "Could not use passwordless SSH."
fi