《docker从零到壹》（一）：docker入门（镜像和容器使用）（三）

export JAVA_HOME=/usr/local/jdk-xxxx
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
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生效命令：source /etc/profile 
测试命令：java -version
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docker cp apache-tomcat-8.5.47.zip mycentos:/root/
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docker attach mycentos
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exit
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docker ps -a
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You cannot attach to a stopped container, start it first
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mv apache-tomcat-8.5.47 /usr/local/tomcat8
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exit
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docker commit mycentos mytomcat8
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docker run -d -i -t --name=tomcat -p 8888:8080 mytomcat8 /bin/bash
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