I have just upgraded from Ubuntu 11.10 to Ubuntu 12.04.
One of the things I did after the upgrade is change over to Java 7 by using the
PPA as described on the WEB UPD8 page (see
http://www.webupd8.org/2012/01/install-oracle-java-jdk-7-in-ubuntu-via.html).
During the installation I noticed the following error message:
update-binfmts: warning: current package is oracle-java7, but binary format
already installed by sun-java6
As the OP I had a very similar result when running update-binfmts --display
(partial result given below)
jar (enabled):
package = sun-java6
type = magic
offset = 0
magic = PK\x03\x04
mask =
interpreter = /usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jexec
detector =
I used the suggestion as opted by the OP using the following command
$ sudo update-binfmts --package sun-java6 --remove jar
/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jexec
update-binfmts: warning: no executable
/usr/lib/jvm/java-6-sun-1.6.0.26/jre/lib/jexec found, but continuing anyway as
you request
Next I reinstalled the Java 7 installer
$ sudo aptitude reinstall oracle-java7-installer
Now the warning is no longer present and the correct jexec is displayed (again
partial result of upate-binfmts --display):
jar (enabled):
package = oracle-java7
type = magic
offset = 0
magic = PK\x03\x04
mask =
interpreter = /usr/lib/jvm/java-7-oracle/jre/lib/jexec
detector =
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https://bugs.launchpad.net/bugs/328174
Title:
Uninstalling sun-java6-* does not remove the binfmts-entry for "jar"
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