生产环境实战spark （3）Linux CentOS 系统安装 修改主机名 安装JDK

生产环境实战spark （3）Linux CentOS 系统安装 修改主机名 安装JDK
1,Linux centos 7 安装完成,修改主机名
2,安装JDK

1,Linux centos 7 安装完成,修改主机名

[root@localhost ~]#  cat /etc/sysconfig/network
# Created by anaconda
[root@localhost ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
[root@localhost ~]# vi /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
~

在以上两个配置文件中,修改主机名为master,修改后重启无效,没有作用.

[root@localhost ~]# hostnamectl  
   Static hostname: localhost.localdomain
         Icon name: computer
           Chassis: n/a
        Machine ID: 51e2d676a69d460692546d433b1d9222
           Boot ID: 76b4fd3198c04302bfe04f182fd6205a
    Virtualization: vmware
  Operating System: CentOS Linux 7 (Core)
       CPE OS Name: cpe:/o:centos:centos:7
            Kernel: Linux 3.10.0-123.el7.x86_64
      Architecture: x86_64
[root@localhost ~]# hostnamectl set-hostname master
[root@localhost ~]# hostnamectl --pretty

[root@localhost ~]# hostname
master
[root@localhost ~]# hostnamectl --static
master
[root@localhost ~]# hostnamectl
   Static hostname: master
         Icon name: computer
           Chassis: n/a
        Machine ID: 51e2d676a69d460692546d433b1d9222
           Boot ID: 76b4fd3198c04302bfe04f182fd6205a
    Virtualization: vmware
  Operating System: CentOS Linux 7 (Core)
       CPE OS Name: cpe:/o:centos:centos:7
            Kernel: Linux 3.10.0-123.el7.x86_64
      Architecture: x86_64
[root@localhost ~]# hostnamectl --transient
master
[root@localhost ~]#  hostnamectl --static
master
[root@localhost ~]# hostnamectl --pretty
[root@localhost ~]# reboot
按照 hostnamectl set-hostname master这个来修改主机名,修改成功! 提示符号已经更改为[root@master ~]# 
Last login: Mon Apr 10 10:00:54 2017 from 132.150.75.19
[root@master ~]# hostnamectl --pretty

[root@master ~]# hostname
master
[root@master ~]# hostnamectl 
   Static hostname: master
         Icon name: computer
           Chassis: n/a
        Machine ID: 51e2d676a69d460692546d433b1d9222
           Boot ID: 61d89f635de049f18e695210b542b8e9
    Virtualization: vmware
  Operating System: CentOS Linux 7 (Core)
       CPE OS Name: cpe:/o:centos:centos:7
            Kernel: Linux 3.10.0-123.el7.x86_64
      Architecture: x86_64
[root@master ~]# 

2,JDK安装

jdk下载地址: http://www.oracle.com/technetwork/java/javase/downloads/index.html下载版本为64位的JDK: Linux x64 174.76 MB   jdk-8u121-linux-x64.tar.gz 



在master创建一个目录,用来保存安装的压缩包
Last login: Mon Apr 10 10:01:09 2017 from 132.150.75.19
[root@master ~]# cd /usr/local
[root@master local]# mkdir rhzf_spark_setupTools
[root@master local]# chmod 777  rhzf_spark_setupTools
[root@master local]# ls -ltr
total 44
drwxr-xr-x. 2 root root 4096 Jun 10  2014 src
drwxr-xr-x. 2 root root 4096 Jun 10  2014 sbin
drwxr-xr-x. 2 root root 4096 Jun 10  2014 libexec
drwxr-xr-x. 2 root root 4096 Jun 10  2014 lib64
drwxr-xr-x. 2 root root 4096 Jun 10  2014 lib
drwxr-xr-x. 2 root root 4096 Jun 10  2014 include
drwxr-xr-x. 2 root root 4096 Jun 10  2014 games
drwxr-xr-x. 2 root root 4096 Jun 10  2014 etc
drwxr-xr-x. 2 root root 4096 Jun 10  2014 bin
drwxr-xr-x. 5 root root 4096 Apr  6 08:47 share
drwxrwxrwx. 2 root root 4096 Apr 10 10:42 rhzf_spark_setupTools
[root@master local]# 

jdk下载到本地,然后通过winscp第三方工具上传到云平台虚拟机:



解压缩安装JDK
[root@master local]# cd rhzf_spark_setupTools
[root@master rhzf_spark_setupTools]# ls
jdk-8u121-linux-x64.tar.gz
[root@master rhzf_spark_setupTools]#  tar  -zxvf  jdk-8u121-linux-x64.tar.gz
jdk1.8.0_121/
jdk1.8.0_121/THIRDPARTYLICENSEREADME-JAVAFX.txt
jdk1.8.0_121/THIRDPARTYLICENSEREADME.txt
jdk1.8.0_121/lib/
jdk1.8.0_121/lib/jexec

......

[root@master rhzf_spark_setupTools]# ls
jdk1.8.0_121  jdk-8u121-linux-x64.tar.gz
[root@master rhzf_spark_setupTools]# mv jdk1.8.0_121   /usr/local
[root@master rhzf_spark_setupTools]# cd /usr/local
[root@master local]# ls
bin  etc  games  include  jdk1.8.0_121  lib  lib64  libexec  rhzf_spark_setupTools  sbin  share  src
[root@master local]# vi /etc/profile

......

export JAVA_HOME=/usr/local/jdk1.8.0_121
export PATH=.:$PATH:$JAVA_HOME/bin

[root@master jdk1.8.0_121]# source /etc/profile
[root@master jdk1.8.0_121]# java -version
java version "1.7.0_51"
OpenJDK Runtime Environment (rhel-2.4.5.5.el7-x86_64 u51-b31)
OpenJDK 64-Bit Server VM (build 24.51-b03, mixed mode)
重启配置文件,发现JDK8未生效,原因是centos 操作系统自带了JDK 7。先将JDK7 删除掉：
[root@master local]#  rpm -qa | grep java
tzdata-java-2014b-1.el7.noarch
python-javapackages-3.4.1-5.el7.noarch
java-1.7.0-openjdk-headless-1.7.0.51-2.4.5.5.el7.x86_64
java-1.7.0-openjdk-1.7.0.51-2.4.5.5.el7.x86_64
javapackages-tools-3.4.1-5.el7.noarch
删除原来系统自带的JDK
[root@master local]# rpm -e --nodeps   java-1.7.0-openjdk-1.7.0.51-2.4.5.5.el7.x86_64
[root@master local]# rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.51-2.4.5.5.el7.x86_64
[root@master local]#  rpm -qa | grep java
tzdata-java-2014b-1.el7.noarch
python-javapackages-3.4.1-5.el7.noarch
javapackages-tools-3.4.1-5.el7.noarch

校验JDK 8 已经安装完成：
[root@master local]# java -version
java version "1.8.0_121"
Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
[root@master local]#