[root@centos8 ~]# wget https://mirrors.bfsu.edu.cn/apache/zookeeper/zookeeper-3.5.7/apache-zookeeper-3.5.7-bin.tar.gz
[root@centos8 ~]# tar -xf apache-zookeeper-3.5.7.tar.gz
[root@centos8 ~]# mv apache-zookeeper-3.5.7 /usr/local/zookeepr
[root@centos8 ~]# /usr/local/zookeeper/conf/
[root@centos8 ~]# mv zoo_sample.cfg zoo.cfg
[root@centos8 ~]# cd ../bin
[root@centos8 bin]# ./zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

如果启动失败，如下：

[root@centos8 bin]# ./zkServer.sh start
syncLimit=5
/bin/java
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
syncLimit=5
Starting zookeeper ... FAILED TO START

看一下原因

[root@centos8 bin]# ./zkServer.sh start-foreground
/bin/java
ZooKeeper JMX enabled by default
Using config: /usr/local/zookeeper/bin/../conf/zoo.cfg
Error: Could not find or load main class org.apache.zookeeper.server.quorum.QuorumPeerMain
Caused by: java.lang.ClassNotFoundException: org.apache.zookeeper.server.quorum.QuorumPeerMain

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