multi:
type: txt
help: Name or IP address of NTP server
update:expression: "sudo sh -c \"touch /etc/ntp.conf && \
if ! grep -q 'server.*$VAR(@)' /etc/ntp.conf; then \
  echo \\\"server $VAR(@)\\\" >> /etc/ntp.conf && \
  /usr/sbin/invoke-rc.d ntp restart; \
fi\" "
delete:expression: "sudo sh -c \"touch /etc/ntp.conf && \
if grep -q 'server.*$VAR(@)' /etc/ntp.conf; then \
  sed -i '/server $VAR(@)/d' /etc/ntp.conf && \
  if grep -q '^server ' /etc/ntp.conf; then \
    /usr/sbin/invoke-rc.d ntp restart; \
  else \
    /usr/sbin/invoke-rc.d ntp stop; \
  fi; \
fi\" "