1.安装好Java，配置好JAVA_HOME
之前安全的可以通过rpm -e删除掉
2.使用bin版本，含有lib文件
apache-zookeeper-3.5.6-bin.tar.gz
源码包apache-zookeeper-3.5.6.tar.gz 安装时，未编译启动时会报错：
Error: Could not find or load main classorg.apache.zookeeper.server.quorum.QuorumPeerMain
/etc/profile
export JAVA_HOME=/usr/local/jdk1.8.0_221
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$JAVA_HOME/bin:$PATH
export ZOOKEEPER_HOME=/usr/local/zookeeper
export PATH=$ZOOKEEPER_HOME/bin:$PATH
3.8080端口被占用
Caused by: java.io.IOException: Failed to bind to /0.0.0.0:8080
修改zoo.cfg配置文件
admin.serverPort=9091
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