Linux (CentOS) install JDK

   Newcomers join, everyone take care

    I recently started learning Linux, first deploying a java web service, and first installing JDK.

   Software version

• Virtual machine: Click to download VMware VMware-workstation-full-10.0.7-2844087  access password ca95
• Linux: Click to download CentOS-6.7-i386-bin-DVD1  access password 1ec5
• Remote tools: Click to download Xshell_V5.0.0.24_setup.1438162236  access password a4d8
• JDK: Click to download jdk-8u65-linux-i586  access password e765

    1. Check whether the system comes with JDK java -version

    2. View all installed java  rpm -qa | grep java

    3. Delete the installed java  rpm -e --nodeps java filename

    4. Install the transfer file plugin  yum install lrzsz

    5. Transfer directory, transfer to the current directory rz

    6. Install the JDK file  rpm -ivh where the jdk file is located

    7. Modify the configuration file  vi /etc/profile and insert the following content

export JAVA_HOME = /usr/java/jdk1.8.0_65
export CLASSPATH = .:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/tools.jar
export PATH = $PATH:$JAVA_HOME/bin

     :wq save and exit

    8. Check if the environment variable is configured successfully javac