How to update GlassFish

stop GlassFish

glassfish/glassfish/bin$ ./asadmin stop-domain

glassfish/bin$ ./updatetool


The software needed for this command (updatetool) is not installed.

If you choose to install Update Tool, your system will be automatically
configured to periodically check for software updates. If you would like
to configure the tool to not check for updates, you can override the
default behavior via the tool's Preferences facility.

When this tool interacts with package repositories, some system information
such as your system's IP address and operating system type and version
is sent to the repository server. For more information please see:

http://wikis.sun.com/display/updatecenter/UsageMetricsUC2

Once installation is complete you may re-run this command.

Would you like to install Update Tool now (y/n): y

Proxy: Using system proxy settings.
Install image: glassfish
Installing pkg packages.
Installing updatetool packages.
Initialization complete.

Software successfully installed. You may now re-run this command (updatetool).