服務器經常斷電或被人爲操作重啓了，tomcat程序沒運行起來怎麼辦？實測有效方法如下：
本文配置環境如下：
Ubuntu：Ubuntu 16.04 LTS \n \l
CATALINA_HOME：/mnt/apache-tomcat-7.0.75
JAVA_HOME：/usr/jvm/jdk1.8.0_161
一、複製tomcat的bin目錄下的catalina.sh到/etc/init.d目錄下：
cp /mnt/apache-tomcat-7.0.75/bin/catalina.sh /etc/init.d/
二、重命名catalina.sh爲tomcat7：
mv /etc/init.d/catalina.sh /etc/init.d/tomcat7
三、修改tomcat7配置環境，注意CATALINA_HOME和JAVA_HOME對應路徑：
#!/bin/sh
CATALINA_HOME=/mnt/apache-tomcat-7.0.75
JAVA_HOME=/usr/jvm/jdk1.8.0_161
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
四、設置自啓動：
update-rc.d -f tomcat7 defaults
注意：此時遇到一個錯誤告警（未遇到可忽略）如下：
root@ubuntu-test:/mnt/apache-tomcat-7.0.75/bin# update-rc.d -f tomcat7 defaults
insserv: warning: script 'tomcat7' missing LSB tags and overrides
此時需要再次修改tomact7加入如下配置：
#!/bin/sh
### BEGIN INIT INFO
# Provides: tomcat7
# Required-Start: $remote_fs $network
# Required-Stop: $remote_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: The tomcat7 Java Application Server
### END INIT INFO
CATALINA_HOME=/mnt/apache-tomcat-7.0.75
JAVA_HOME=/usr/jvm/jdk1.8.0_161
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
再次執行就好了：
root@ubuntu-test:/# update-rc.d -f tomcat7 defaults
root@ubuntu-test:/#
五、同一個服務器配置多個tomcat自啓動需注意以下：
在重複上面前面四個步驟時後，設置自啓動update-rc.d -f tomcat8 defaults時，或許會報錯如下：
root@ubuntu-test:/# update-rc.d -f tomcat8 defaults
insserv: script tomcat7-new: service tomcat already provided!
則需要修改tomcat8配置文件：
六、重啓服務器測試是否生效，直接執行reboot命令：
root@ubuntu-test:/# reboot
Welcome to Ubuntu 16.04 LTS (GNU/Linux 4.4.0-169-generic x86_64)
* Documentation: https://help.ubuntu.com/
174 packages can be updated.
4 updates are security updates.
New release '18.04.3 LTS' available.
Run 'do-release-upgrade' to upgrade to it.
執行ps -ef|grep tomcat查看是否啓動
root@ubuntu-test:~# ps -ef|grep tomcat
root 1183 1 99 11:03 ? 00:02:39 /usr/jvm/jdk1.8.0_161/bin/java -Djava.util.logging.config.file=/mnt/apache-tomcat-7.0.75-new/conf/logging.properties -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -Djdk.tls.ephemeralDHKeySize=2048 -Djava.endorsed.dirs=/mnt/apache-tomcat-7.0.75-new/endorsed -classpath /mnt/apache-tomcat-7.0.75-new/bin/bootstrap.jar:/mnt/apache-tomcat-7.0.75-new/bin/tomcat-juli.jar -Dcatalina.base=/mnt/apache-tomcat-7.0.75-new -Dcatalina.home=/mnt/apache-tomcat-7.0.75-new -Djava.io.tmpdir=/mnt/apache-tomcat-7.0.75-new/temp org.apache.catalina.startup.Bootstrap start
瀏覽器檢查是否啓動。