To update the source tree at /usr/src on a FreeBSD system using svn, you will need to have the subversion package installed on your system.
Here are the steps to update the source tree at /usr/src using svn on a FreeBSD system:
Open a terminal window and log in to the system as the root user.
Make sure that the subversion package is installed on your system. If it is not already installed, you can install it using the following command:
pkg install subversion
/usr/src directory using the cd command:cd /usr/src
svn update
This command will update the source tree to the latest available version.
It is a good idea to periodically update the source tree on your FreeBSD system to ensure that you are running the latest version of the software. Updating the source tree can also help fix any security vulnerabilities or bugs that may have been discovered in the software.
For more information about using svn to update the source tree on a FreeBSD system, you can consult the documentation for svn or visit the FreeBSD website.