一 安装lrzsz软件上传下载
yum -y install lrzsz
二 配置jdk环境
vi /etc/profile
export JAVA_HOME=/opt/jdk/jdk1.8
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JAVA_HOME/jre/lib/rt.jar
export PATH=$PATH:$JAVA_HOME/bin
source /etc/profile
[root@master jdk1.8]# java -version
java version "1.8.0_201"
Java(TM) SE Runtime Environment (build 1.8.0_201-b09)
Java HotSpot(TM) 64-Bit Server VM (build 25.201-b09, mixed mode)