sleep 300 # wait 5 minutes

You might want to read a little about shell programming ....

Kind regards,
Thomas

# Description:
### END INIT INFO
#######################################
#
# NetXMS server startup script
# For Ubuntu Linux
#
# Written by Dmitry Chernyshov
# dchernyshov@cogito.ru
#
#######################################

NETXMS_BINDIR="~BINDIR~"
NETXMS_LIBDIR="~LIBDIR~"

NAME=netxmsd
DAEMON=$NETXMS_BINDIR/netxmsd
PIDFILE=/var/run/netxmsd.pid

test -x $DAEMON || exit 5


. /lib/lsb/init-functions
case "$1" in
 start)
        # start daemon
        log_daemon_msg "Starting NetXMS server" "netxmsd"
        start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- -p $PIDFILE -d
        log_end_msg $?
        ;;
 stop)
        log_daemon_msg "Stopping NetXMS server" "netxmsd"
        start-stop-daemon --stop --quiet --pidfile $PIDFILE
        log_end_msg $?
        ;;
 restart)
        $0 stop && sleep 2 && $0 start
        ;;
esac

What line should I modify to make the netxms launch after 5 minutes?

obviously the DB startup lasts a little longer than usual when recovering from the unclean shutdown.

I would try to sleep() for a minute or two in the netxmsd startup file (maybe in /etc/init.d/netxmsd).

Kind regards,
Thomas