进入到idea的tomcat的run/debug配置，新建个remote tomcat,然后填写相关信息，如上图(注意远程调试端口)。
再选择Startup/Connection，如下图所示：
到此，idea已经配置好了，接下来将图上说的那段拷贝到远程的tomcat的catalina.sh文件中。
登陆到远程服务器，进入到tomcat的bin目录下，vi打开catalina.sh文件：
找到第一个JAVA_OPTS，添加：
JAVA_OPTS="-agentlib:jdwp=transport=dt_socket,address=54531,suspend=n,server=y"或者
CATALINA_OPTS="-agentlib:jdwp=transport=dt_socket,address=54531,suspend=n,server=y"
填一个即可。
重启下tomcat。
netstat -an | grep 55555，查看下55555端口是否打开，打开说民设置成功。
这样既可以使用idea远程调试了。
另外最好的方式就是不要去改动默认的sh文件，那就是自己写的debug.sh。
将startup.sh拷贝一份，改名为debug.sh.
打开，内容如下：
#!/bin/sh
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# -----------------------------------------------------------------------------
# Start Script for the CATALINA Server
# -----------------------------------------------------------------------------
# Better OS/400 detection: see Bugzilla 31132
os400=false
case "`uname`" in
OS400*) os400=true;;
esac
# resolve links - $0 may be a softlink
PRG="$0"
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> (.*)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`/"$link"
fi
done
PRGDIR=`dirname "$PRG"`
EXECUTABLE=catalina.sh
# Check that target executable exists
if $os400; then
# -x will Only work on the os400 if the files are:
# 1. owned by the user
# 2. owned by the PRIMARY group of the user
# this will not work if the user belongs in secondary groups
eval
else
if [ ! -x "$PRGDIR"/"$EXECUTABLE" ]; then
echo "Cannot find $PRGDIR/$EXECUTABLE"
echo "The file is absent or does not have execute permission"
echo "This file is needed to run this program"
exit 1
fi
fi
export CATALINA_OPTS="-agentlib:jdwp=transport=dt_socket,address=55555,suspend=n,server=y"
exec "$PRGDIR"/"$EXECUTABLE" start "$@"
增加红色部分即可。
root@×××:/usr/local/tomcat/bin# sh debug.sh
Using CATALINA_BASE: /usr/local/tomcat
Using CATALINA_HOME: /usr/local/tomcat
Using CATALINA_TMPDIR: /usr/local/tomcat/temp
Using JRE_HOME: /usr/lib/jdk/jre
Using CLASSPATH: /usr/local/tomcat/bin/bootstrap.jar:/usr/local/tomcat/bin/tomcat-juli.jar
Tomcat started.
root@×××:/usr/local/tomcat/bin# netstat -ano|grep 55555
tcp 0 0 0.0.0.0:55555 0.0.0.0:* LISTEN off (0.00/0/0)
root@×××:/usr/local/tomcat/bin#
如果按上面步骤执行后，看见设置的端口已经被监听，说明配置成功。