1. 安装虚拟机VMware

1）下载并一步一步安装vmware workstation 14

在vmware官网下载 https://www.vmware.com/
进入“下载”页面，会进入如下link:
https://my.vmware.com/cn/web/vmware/info/slug/desktop_end_user_computing/vmware_workstation_pro/14_0
选择合适下载， 很简单，这个就不多说了。

安装之后，这是试用版，1个月以后会过期，加上下面一串数字就可以长久使用了，网上可以搜到很多、、、
Note: 密钥： CG54H-D8D0H-H8DHY-C6X7X-N2KG6

2）下载CentOS 7镜像

link: http://archive.kernel.org/centos-vault/7.5.1804/isos/x86_64/
下载版本: CentOS-7-x86_64-DVD-1804.iso

workstation导入镜像，一步步安装。
可参考： https://blog.csdn.net/weixin_39879326/article/details/79617042

2. 安装java 并设置环境变量

1）安装java

yum install -y java

2）设置java环境变量

a. 查看java的home目录
[root@localhost ~]# ll /usr/bin/java
lrwxrwxrwx. 1 root root 22 Oct 30 01:29 /usr/bin/java -> /etc/alternatives/java
[root@localhost ~]# ll /etc/alternatives/java
lrwxrwxrwx. 1 root root 46 Oct 30 01:29 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.201.b09-2.el7_6.x86_64/jre/bin/java
由此可知，java的home目录是/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.201.b09-2.el7_6.x86_64/jre

b. 添加环境变量
[root@localhost ~]# vim /etc/profile
…
export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.201.b09-2.el7_6.x86_64/jre
export CLASSPATH=.: $JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar: $JAVA_HOME/lib/tools.jar export PATH=$PATH:$JAVA_HOME/bin

使之生效
[root@localhost ~]# source /etc/profile

3. 安装maven

yum install -y maven 

Issues

Issue1 : Ifconfig command not found

Solution:
yum安装net-tools package
Yum -y install net-tools

Issue 2: yum install failed:One of the configured repositories failed (Unknown)

Solution:
Ping www.baidu.com, if failed, update /etc/sysconfig/network-scripts/ifcfg-ens33
ONBOOT=no, 改为yes
Then it should be ok for ping www.baidu.com
And then yum install will be ok.

Issue 3: locate command not found

Solution:
Yum install -y mlocate

Issue 4: locate: can not stat () `/var/lib/mlocate/mlocate.db’: No such file or directory

Solution:
Command: updatedb