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