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How to Recompile the FreeBSD Kernel

The below example is for SMP, Quotas, and Firewall support.

Sources must be installed to recompile the kernel. If sources are not on the server type:

/stand/sysinstall and go to configure>Package>Sources.

cd /usr/src/sys/i386/conf


edit the SMP file and add the following under the options section:

#Added options for SMP kernel

options SMP

options QUOTA

#Enables Firewall

#Enables firewall logging to syslog

#Limits logging to prevent syslog DOS options

#Defaults to all open

Save the file

At this point there are 2 way to proceed in compiling the kernel: the old way and the new way. First, we’ll show you the old way.


Old way:

/usr/sbin/config SMP

cd ../compile/SMP

make depend


make install

Reboot to load the new kernel


New Way:

cd /usr/src

make buildkernel KERNCONF=SMP

make installkernel KERNCONF=SMP

Reboot to load the new kernel


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