Install JDK in Linux

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1.download jdk installer

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jdk-8u271-linux-x64.tar.gz

2.upload jdk installer to the server

3.decompression jdk installer

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# tar -xf jdk-8u271-linux-x64.tar.gz

4.configure the environment variable

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# vim /etc/profile
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# jdk
export JAVA_HOME=/usr/local/jdk/jdk1.8.0_271
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
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# source /etc/profile

5.verify the configuration

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# java -version
# javac -version