open a root session in the konsole program and use portsnap.
to install ports tree:
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Code:
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portsnap fetch extract |
to update ports tree files:
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Code:
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portsnap fetch update |
Note that that will only update files in /usr/ports, not the installed software -- for that you may want to check out the portmaster or portupgrade programs.
For details on working with ports, check the PC-BSD Quick Guide and FreeBSD handbook, they are a great starting point.