CentOS7 安装Jdk并配置环境变量

检测自带openjdk

#rpm -qa | grep java

卸载自带jdk

#rpm -e --nodeps ``rpm -qa | grep java`

官网下载:

#wget http://download.oracle.com/otn-pub/java/jdk/8u171-b11/512cd62ec5174c3487ac17c61aaa89e8/jdk-8u171-linux-i586.tar.gz?AuthParam=1531295144_880c2dc1d62bf0656052339c2d1c0d0a

解压:

# tar -zxvf jdk-8u171-linux-i586.tar.gz\?AuthParam\=1531295144_880c2dc1d62bf0656052339c2d1c0d0a 

# pwd 

    /root/java

配置环境变量:

# vim /etc/profile

在最后加上

#java
export JAVA_HOME=/root/java/jdk1.8.0_171
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:{JAVA_HOME}/lib:${JRE_HOME}/lib

export PATH=${JAVA_HOME}/bin:$PATH

配置生效:

#source /etc/profile

测试:

    java

    javac

可能遇到问题:

运行#java  #javac  #java -version报错:

bash: /root/java/jdk1.8.0_171/bin/javac: /lib/ld-linux.so.2: bad ELF interpreter: 没有那个文件或目录

解决:# sudo yum install glibc.i686