编写了一个tomcat开机自启动脚本，执行没问题，但是在安装mysql的时候出现了大量的：

insserv: warning: script 'S20tomcat' missing LSB tags and overrides

insserv: warning: script 'tomcat' missing LSB tags and overrides

insserv: There is a loop at service rmnologin if started

insserv: There is a loop between service rmnologin and mountnfs if started

insserv:  loop involving service mountnfs at depth 6

insserv:  loop involving service networking at depth 5

insserv: There is a loop between service tomcat and hwclock if started

insserv:  loop involving service hwclock at depth 3

insserv:  loop involving service mountdevsubfs at depth 2

insserv: There is a loop between service tomcat and udev if started

insserv:  loop involving service udev at depth 1

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

insserv: Starting tomcat depends on rmnologin and therefore on system facility `$all' which can not be true!

居然还导致mysql安装后的自动配置提示失败，按照LSB tags规范改写脚本如下（debian8环境）：

#!/bin/bash

### BEGIN INIT INFO

# Provides:          bbzhh.com

# Required-Start:    $local_fs $network

# Required-Stop:     $local_fs

# Default-Start:     2 3 4 5

# Default-Stop:      0 1 6

# Short-Description: tomcat service

# Description:       tomcat service daemon

### END INIT INFO

#

# description: Apache Tomcat init script

# processname: tomcat

# chkconfig: 234 20 80

#

#

# Copyright (C) 2014 Miglen Evlogiev

#

# This program is free software: you can redistribute it and/or modify it under

# the terms of the GNU General Public License as published by the Free Software

# Foundation, either version 3 of the License, or (at your option) any later

# version.

#

# This program is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of  MERCHANTABILITY or FITNESS

# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License along with

# this program.  If not, see <http://www.gnu.org/licenses/>.

#

# Initially forked from: gist.github.com/valotas/1000094

# Source: gist.github.com/miglen/5590986

#Location of JAVA_HOME (bin files)

export JAVA_HOME=/opt/jdk

#Add Java binary files to PATH

export PATH=$JAVA_HOME</span>/bin:<span class="variable">$PATH

#CATALINA_HOME is the location of the bin files of Tomcat

export CATALINA_HOME=/opt/tomcat

#CATALINA_BASE is the location of the configuration files of this instance of Tomcat

export CATALINA_BASE=/opt/tomcat

export CATALINA_BOOTSTRAP=/opt/tomcat/bin/bootstrap.jar

#TOMCAT_USER is the default user of tomcat

export TOMCAT_USER=tomcat

#TOMCAT_USAGE is the message if this script is called without any options

TOMCAT_USAGE="Usage: $0 {\e[00;32mstart\e[00m|\e[00;31mstop\e[00m|\e[00;31mkill\e[00m|\e[00;32mstatus\e[00m|\e[00;31mrestart\e[00m}"

#SHUTDOWN_WAIT is wait time in seconds for java proccess to stop

SHUTDOWN_WAIT=20

tomcat_pid() {

        echo `ps -fe | grep $CATALINA_BOOTSTRAP | grep -v grep | tr -s " "|cut -d" " -f2`

}

start() {

  pid=$(tomcat_pid)

  if [ -n "$pid" ]

  then

    echo -e "\e[00;31mTomcat is already running (pid: $pid)\e[00m"

  else

    # Start tomcat

    echo -e "\e[00;32mStarting tomcat\e[00m"

    #ulimit -n 100000

    #umask 007

    #/bin/su -p -s /bin/sh $TOMCAT_USER

        if [ `user_exists $TOMCAT_USER` = "1" ]

        then

                /bin/su $TOMCAT_USER</span> -c <span class="variable">$CATALINA_HOME/bin/startup.sh

        else

                echo -e "\e[00;31mTomcat user $TOMCAT_USER</span> does not exists. Starting with <span class="variable">$(id)\e[00m"

                sh $CATALINA_HOME/bin/startup.sh

        fi

        status

  fi

  return 0

}

status(){

          pid=$(tomcat_pid)

          if [ -n "$pid" ]

            then echo -e "\e[00;32mTomcat is running with pid: $pid\e[00m"

          else

            echo -e "\e[00;31mTomcat is not running\e[00m"

            return 3

          fi

}

terminate() {

        echo -e "\e[00;31mTerminating Tomcat\e[00m"

        kill -9 $(tomcat_pid)

}

stop() {

  pid=$(tomcat_pid)

  if [ -n "$pid" ]

  then

    echo -e "\e[00;31mStoping Tomcat\e[00m"

    #/bin/su -p -s /bin/sh $TOMCAT_USER

        sh $CATALINA_HOME/bin/shutdown.sh

    let kwait=$SHUTDOWN_WAIT

    count=0;

    until [ `ps -p $pid | grep -c $pid` = '0' ] || [ $count</span> <span class="operator">-gt</span> <span class="variable">$kwait ]

    do

      echo -n -e "\n\e[00;31mwaiting for processes to exit\e[00m";

      sleep 1

      let count=$count+1;

    done

    if [ $count</span> <span class="operator">-gt</span> <span class="variable">$kwait ]; then

      echo -n -e "\n\e[00;31mkilling processes didn't stop after $SHUTDOWN_WAIT seconds\e[00m"

      terminate

    fi

  else

    echo -e "\e[00;31mTomcat is not running\e[00m"

  fi

  return 0

}

user_exists(){

        if id -u $1 >/dev/null 2>&1; then

        echo "1"

        else

                echo "0"

        fi

}

case $1 in

        start)

          start

        ;;

        stop)

          stop

        ;;

        restart)

          stop

          start

        ;;

        status)

                status

                exit $?

        ;;

        kill)

                terminate

        ;;

        *)

                echo -e $TOMCAT_USAGE

        ;;

esac

exit 0

其实解决办法就是在#!/bin/bash下面添加：

### BEGIN INIT INFO

# Provides:          bbzhh.com

# Required-Start:    $local_fs $network

# Required-Stop:     $local_fs

# Default-Start:     2 3 4 5

# Default-Stop:      0 1 6

# Short-Description: tomcat service

# Description:       tomcat service daemon

### END INIT INFO

当然，也可以一劳永逸的：

apt-get remove insserv