![]() So which number should I select to have sun-java as the default runtime? Also, what exactly do the auto and manual modes mean? If I select 3 above and run the update-alternative command I receive the same output as above, again nothing seems to have changed except the * is now in front of the 3, though it still reads manual mode. sudo apt update sudo apt -y install wget curl wget. Alternatively you can download directly in server using weget command. Step 1: Download jdk from URL and move to server -圆b. ![]() the alternative which would be used in automatic mode: update-alternatives -auto javac This doesn't appear to be mentioned in the manpage, but see the source code: indicates the current selection, the 'best' selection. Steps I followed to install java 17 in Debian 10. Press enter to keep the current choice, or type selection number: Using update-alternatives for switching between multiple versions of Java is a pain since each tool of a JRE or JDK is its own group of alternatives. 1 Answer Sorted by: 2 The asterisk identifies the default entry, i.e. * 0 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 auto modeĢ /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual modeģ /usr/lib/jvm/java-6-sun/jre/bin/java 63 manual mode setx JAVAHOME 'C:\Program Files\Java\jdk1.8.025. There are 3 choices for the alternative java (providing /usr/bin/java). and then, create one or several batch files to switch version, which will enable the ability to change the JAVAHOME variable just by one click. ![]() In this time lets install openJDK 8 version. Then I was told to use the command sudo update-alternatives -config java to make sure that a particular java is the default runtime. Verify your Java version with the following command java -version javac -version Now lets install another version of java to Ubuntu machine. I have been instructed to install sun-java JDK 1st. Those errors are harmless because you're using a JRE the missing commands are provided by JDKs only. I am installing Apache Solr on Linux Debian.
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