So, you see my chain goes like /usr/bin/java -> /etc/alternatives/java ->. in my case for java: % update-alternatives -query java To answer your first question I'd like to hint you to -query: -query nameĭisplay information about the link group like -display does, but in a machine parseable way (see section QUERY FORMAT below).Īrmed with this you will get the link source, e.g. So, here comes the questions: (1) Are there any update-alternative arguments that can output the current link that is pointing to a specific alternative, or (2) is there a way to install a new alternative without having to provide a new parameter, simply keeping the current ? That works fine, but as you see, running the command with /tmp/randomStuff as the parameter is very awkward.
Reading the output I find out the old link that was pointing to the alternative, so I can finally run my command again with the right parameter, changing /tmp/randomStuff to /usr/local/bin/java: sudo update-alternatives -install /usr/local/bin/java java /usr/local/java/jre1.7.0_25/bin/java 0 That command will output: update-alternatives: renaming java link from /usr/local/bin/java to /tmp/randomStuff.
What I currently do is: sudo update-alternatives -install /tmp/randomStuff java /usr/local/java/jre1.7.0_25/bin/java 0 Let's say I want to add a new version of Java Runtime Edition, but I don't know the current symlink that links to the alternative ( parameter). I've looked up the manual of update-alternatives several times but I can't find out how to show the current link pointing to a specific alternative, and that information is needed when adding a new alternative.įrom the update-alternatives manual: -install
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