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NetBeans registration directory (~/.netbeans-registration) is created under root user and thus IDE registration status can`t be stored. Workaround is either change permissions to "anyone can do anything" or just change the ownership to the current user. 1) sudo chmod -r 777 ~/.netbeans-registration 2) sudo chown -R `ls -nlda ~ | awk ' { print $3 ":" $4 } ' 2>/dev/null` ~/.netbeans-registration
Has been fixed some time ago. http://hg.netbeans.org/main/rev/70863e968f62
*** Issue 163634 has been marked as a duplicate of this issue. ***