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. Table B.1, java alternative commands shows the relevant command settings for each of the different JDKs. Instead, it is a symbolic link to a name in theĪlternatives directory, which in turn is a symbolic link to the actualįile referenced. Run the following command: /usr/sbin/alternatives -config java Next, follow the on-screen directions to ensure that the correct version of java is selected.

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