JDK安装步骤

[hadoop@hadoop1 soft]$ tar zxvf jdk-8u144-linux-x64.tar.gz -C /opt/module

卸载现有JDK

[root@hadoop1 opt]# rpm -qa | grep java

使用 rpm -e 软件包命令

[root@hadoop1 opt]# which java

/usr/bin/which: no java in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin)

上传安装包

[hadoop@hadoop1 soft]$ tar zxvf jdk-8u144-linux-x64.tar.gz -C /opt/module

[hadoop@hadoop1 jdk1.8.0_144]$ sudo vi /etc/profile

#JAVA_HOME

export JAVA_HOME=/opt/module/jdk1.8.0_144

export PATH=$PATH:$JAVA_HOME/bin

[hadoop@hadoop1 jdk1.8.0_144]$ source /etc/profile

[hadoop@hadoop1 jdk1.8.0_144]$ java -version

java version "1.8.0_144"

Java(TM) SE Runtime Environment (build 1.8.0_144-b01)

Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

[root@hadoop1 ~]# yum -y install rsync

[root@hadoop1 ~]# systemctl start rsyncd.service

[root@hadoop1 ~]# systemctl enable rsyncd.service

编写分发脚本

[hadoop@hadoop1 bin]$ sudo chmod 777 xrsync.sh

[hadoop@hadoop1 bin]$ ll

total 4

-rwxrwxrwx. 1 root root 473 May  3 01:03 xrsync.sh

[hadoop@hadoop1 bin]$ source /etc/profile

[hadoop@hadoop1 ~]$ cd /opt/module/jdk1.8.0_144/

[hadoop@hadoop1 jdk1.8.0_144]$ pwd

/opt/module/jdk1.8.0_144

[hadoop@hadoop1 jdk1.8.0_144]$ xrsync.sh /opt/module/jdk1.8.0_144/

更新配置文件

[root@hadoop1 ~]# xrsync.sh /etc/profile

[hadoop@hadoop1 bin]$ xcall.sh source /etc/profile