if ! ssh root@$computer "[ ! -f ~/.backup/preexec ] || /bin/bash -x ~/.backup/preexec" >&2; then
echo `date`" $computer: Could not run $computer:~/.backup/preexec"
die
if ! ssh root@$computer "[ ! -f ~/.backup/preexec ] || /bin/bash -x ~/.backup/preexec" >&2; then
echo `date`" $computer: Could not run $computer:~/.backup/preexec"
die