步骤一：检查是否安装jdk

[root@localhost test]# java -version

步骤二：创建目录，上传java安装包：jdk-8u121-linux-x64.tar.gz

[root@localhost test]# cd /usr/local/   #打开指定目录
[root@localhost local]# mkdir java    #创建文件
[root@localhost java]# tar -xvf jdk-8u121-linux-x64.tar.gz  #解压

步骤三：安装依赖：yum install glibc.i686

[root@localhost java]# yum install glibc.i686  #安装依赖

步骤四：配置环境变量

[root@localhost java]# vi /etc/profile

..............请滑到最底部设置环境变量.................
unset -f pathmunge

if [ -n "${BASH_VERSION-}" ] ; then
        if [ -f /etc/bashrc ] ; then
                # Bash login shells run only /etc/profile
                # Bash non-login shells run only /etc/bashrc
                # Check for double sourcing is done in /etc/bashrc.
                . /etc/bashrc
       fi
fi

#在最下方设置以下变量

        #set java environment
        JAVA_HOME=/usr/local/java/jdk1.8.0_121
        CLASSPATH=.:$JAVA_HOME/lib.tools.jar
        PATH=$JAVA_HOME/bin:$PATH
        export JAVA_HOME CLASSPATH PATH

步骤五：保存配置使更改的配置立即生效

[root@localhost java]# source /etc/profile  #使更改的配置立即生效

步骤六：查看jdk配置

[root@localhost java]# 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)

liunx下安装jdk环境虽然简单，但是还是得纪录下，分享学习。加油！