On Fri, 2011-02-11 at 11:42 -0800, ann kok wrote: > Hi > > I use yum to install openjdk 1.6.0 in centos5.5 > > but the firefox browser still says that > > JRE not installation / Java is disabled > > Can you help > <snip> This works for me. To enable java, download and install the appropriate version for your architecture here. http://java.com/en/download/linux_manual.jsp?locale=en&host=www.java.com . For i386: Navigate to /usr/lib/mozilla/plugins and create ln -s to /usr/java/jre*/lib/i386/libnpjp2.so. For x86_64: Navigate to /usr/lib64/mozilla/plugins and ln -s to /usr/lib/java/jre*/lib/amd64/libnpjp2.so. HTH, YMMV B.J.