ssh l29ah.blasux.ru tail -F /var/log/dhcpd/current | sed -une 's#.*DHCPACK on \([^ ]*\) to.*#\1#p' | while read -r addr; do
sshpa admin ssh "admin@$addr" show > "show-$addr" &
sleep 5
kill %1
done
↓
проходится один раз по циклу, затем
./dhcpd-handler.sh: line 44: read: read error: 0: Resource temporarily unavailable
ШТО????