如何卸载linux自带openjdk并安装sun jdk
参见：https://www.nhooo.com/article/112612.htm
检查一下系统中的jdk版本
[hadoop@master~]$java-version openjdkversion"1.8.0_222-ea" OpenJDKRuntimeEnvironment(build1.8.0_222-ea-b03) OpenJDK64-BitServerVM(build25.222-b03,mixedmode)
检测jdk安装包
[hadoop@master~]$rpm-qa|grepjava python-javapackages-3.4.1-11.el7.noarch javapackages-tools-3.4.1-11.el7.noarch tzdata-java-2019b-1.el7.noarch java-1.8.0-openjdk-headless-1.8.0.222.b03-1.el7.x86_64 java-1.8.0-openjdk-1.8.0.222.b03-1.el7.x86_64 [hadoop@master~]$
卸载openjdk
[hadoop@master~]$sudoyum-yremove*openjdk* [sudo]passwordforhadoop: Loadedplugins:langpacks,ulninfo ResolvingDependencies -->Runningtransactioncheck --->Packagejava-1.8.0-openjdk.x86_641:1.8.0.222.b03-1.el7willbeerased -->ProcessingDependency:java>=1.5forpackage:jline-1.0-8.el7.noarch -->ProcessingDependency:java-1.8.0-openjdkforpackage:icedtea-web-1.7.1-1.el7.x86_64 --->Packagejava-1.8.0-openjdk-headless.x86_641:1.8.0.222.b03-1.el7willbeerased -->Runningtransactioncheck --->Packageicedtea-web.x86_640:1.7.1-1.el7willbeerased --->Packagejline.noarch0:1.0-8.el7willbeerased -->ProcessingDependency:jlineforpackage:rhino-1.7R5-1.el7.noarch -->Runningtransactioncheck --->Packagerhino.noarch0:1.7R5-1.el7willbeerased -->FinishedDependencyResolution ol7_UEKR5/x86_64|2.5kB00:00:00 ol7_latest/x86_64|2.7kB00:00:00 DependenciesResolved ========================================================================================================================================================================================================== PackageArchVersionRepositorySize ========================================================================================================================================================================================================== Removing: java-1.8.0-openjdkx86_641:1.8.0.222.b03-1.el7@anaconda/7.7642k java-1.8.0-openjdk-headlessx86_641:1.8.0.222.b03-1.el7@anaconda/7.7106M Removingfordependencies: icedtea-webx86_641.7.1-1.el7@anaconda/7.72.3M jlinenoarch1.0-8.el7@anaconda/7.772k rhinonoarch1.7R5-1.el7@anaconda/7.71.1M TransactionSummary ========================================================================================================================================================================================================== Remove2Packages(+3Dependentpackages) Installedsize:110M Downloadingpackages: Runningtransactioncheck Runningtransactiontest Transactiontestsucceeded Runningtransaction Erasing:icedtea-web-1.7.1-1.el7.x86_641/5 Erasing:rhino-1.7R5-1.el7.noarch2/5 Erasing:jline-1.0-8.el7.noarch3/5 Erasing:1:java-1.8.0-openjdk-1.8.0.222.b03-1.el7.x86_644/5 Erasing:1:java-1.8.0-openjdk-headless-1.8.0.222.b03-1.el7.x86_645/5 Verifying:1:java-1.8.0-openjdk-headless-1.8.0.222.b03-1.el7.x86_641/5 Verifying:1:java-1.8.0-openjdk-1.8.0.222.b03-1.el7.x86_642/5 Verifying:icedtea-web-1.7.1-1.el7.x86_643/5 Verifying:rhino-1.7R5-1.el7.noarch4/5 Verifying:jline-1.0-8.el7.noarch5/5 Removed: java-1.8.0-openjdk.x86_641:1.8.0.222.b03-1.el7java-1.8.0-openjdk-headless.x86_641:1.8.0.222.b03-1.el7 DependencyRemoved: icedtea-web.x86_640:1.7.1-1.el7jline.noarch0:1.0-8.el7rhino.noarch0:1.7R5-1.el7 Complete!
上传安装介质并解压
[hadoop@master~]$sudotar-xzfjdk-8u191-linux-x64.tar.gz-C/usr/lib/jvm
设置环境变量,在/etc/profile最前面加上
exportJAVA_HOME=/usr/lib/jvm/jdk1.8.0_191
exportJRE_HOME=${JAVA_HOME}/jre
exportCLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
exportPATH=${JAVA_HOME}/bin:$PATH
最后生效一下source/etc/profile
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