update-alternatives just for one user

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http://unix.stackexchange.com – I'm using a shared server. On that server different versions of Java are installed: Selection Path Priority Status ------------------------------------------------------------ 0 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 auto mode * 1 /usr/lib/jvm/java-6-openjdk/jre/bin/java 1061 manual mode 2 /usr/lib/jvm/java-6-sun/jre/bin/java 63 manual mode I would like to choose the Second options, but if I tried to do that it complains that I do not have the permissions (I'm not root). Is (HowTos)