it has nothing like history built in, so in the general case it's not possible to revert back to an original state.from context, it looks like you meant PATH, however it does not change PATH or JDK, e.g.update-alternatives updates symbolic links.Press to keep the current choice, or type selection number: * 2 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 manual mode There are 2 choices for the alternative java (providing /usr/bin/java).Ġ /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 auto modeġ /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 manual mode Source and more details: man update-alternatives.Īside: This master/slave terminology may be updated at some point.Īs an example on Ubuntu 22.04, I can switch which Java I am using with sudo update-alternatives -config java: $ sudo update-alternatives -config java This is done so that the system administrator'sĬhanges can be confined within the /etc directory. update-alternatives: error: no alternatives for mozilla-javaplugin.so. So to go for OpenJDK 6 to 7, I used update-java-alternatives -l to get a list of Java alternatives and then used sudo update-java-alternatives -s java-1.7.0-openjdk-amd64 to the JDK. Instead, it is a symbolic link to a name in theĪlternatives directory, which in turn is a symbolic link to the actualįile referenced. The trick is to use update-java-alternatives (from the java-common package). The generic name is not a direct symbolic link to the selectedĪlternative. Update-alternatives creates, removes, maintains and displays information about the symbolic links comprising the Debian alternatives system.

Update alternatives java