Openjdk under Linux uninstall, install the JDK
1. View java version
java -version
openjdk Version "1.8.0_171"
the OpenJDK Runtime Environment (Build 1.8.0_171-B10)
the OpenJDK-64-Bit Server VM (Build 25.171-B10, the MODE Mixed)
2. View java software installation
RPM -qa | grep java
tzdata-java-2018E-3.el7.noarch
java-1.8.0-openjdk-1.8.0.171-8.b10.el7_5.x86_64
java-1.7.0-openjdk-headless- 1.7.0.181-2.6.14.8.el7_5.x86_64
Java-1.7.0-OpenJDK-1.7.0.181-2.6.14.8.el7_5.x86_64
javapackages-Tools-3.4.1-11.el7.noarch
Python-3.4.1-javapackages -11.el7.noarch
the Java-1.8.0-openjdk-headless-1.8.0.171-8.b10.el7_5.x86_64
3. Uninstall openjdk
noarch can not delete
rpm -e --nodeps java-1.8.0-openjdk -headless-1.8.0.101-3.b13.el7_2.x86_64
4. Upload jdk package
Official website to download jdk package, uploaded to the server
5. decompression
tar -vzxf jdk-8u191-linux-x64.tar.gz
6. Set Environment Variables
vim /etc/profile
#java
export JAVA_HOME=/data/jdk1.8.0_221
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib
Save and exit, execution
source /etc/profile
7. Test
java -version