Upgrading FreeBSD 10.1-RELEASE To -STABLE

Procedure

Move the current source code to a backup folder to be sure to get only -STABLE code:
mv /usr/src /usr/src-RELEASE
mv /usr/ports /usr/ports-RELEASE

Check out the STABLE source code:

svn checkout https://svn0.us-west.freebsd.org/base/stable/10 /usr/src

svn checkout https://svn0.us-west.freebsd.org/ports/head /usr/ports

*if svn command not found, install svn first,

pkg install devel/subversion

Then cd in to the correct folder

cd /usr/src

Build the world:

make buildworld -j2

*The -j 2 part means that it should run 2 jobs at once.

cd /usr/src/sys/i386/config

cp GENERIC yourkernelname

Build the kernel:

make buildkernel KERNCONF=yourkernelname

make installkernel KERNCONF=yourkernelname

Now reboot in to the new kernel:

shutdown -r now

Now we're giong to install the world

make installworld

After that finished we can do another mergemaster:

mergemaster -p

Almost done, time to reboot

shutdown -r now

Remove old files and libraries:

cd /usr/src

make check-old

>>> Checking for old files

>>> Checking for old libraries

>>> Checking for old directories

To remove old files and directories run 'make delete-old'.

To remove old libraries run 'make delete-old-libs'.

make delete-old

remove /usr/share/doc/atf/AUTHORS? y

remove /usr/share/doc/atf/COPYING? y

remove /usr/share/doc/atf/NEWS? y

remove /usr/share/doc/atf/README? y

remove /usr/share/man/man1/atf-check.1.gz? y

remove /usr/share/man/man1/atf-sh.1.gz? y

remove /usr/share/man/man1/atf-test-program.1.gz? y

remove /usr/share/man/man3/atf-c-api.3.gz? y

remove /usr/share/man/man3/atf-c++-api.3.gz? y

remove /usr/share/man/man3/atf-sh-api.3.gz? y

remove /usr/share/man/man4/atf-test-case.4.gz? y

remove /usr/share/mk/atf.test.mk? y

>>> Old files removed

>>> Removing old directories

>>> Old files removed

To remove old libraries run 'make delete-old-libs'.

make delete-old-libs

>>> Removing old libraries

Please be sure no application still uses those libraries, else you

can not start such an application. Consult UPDATING for more

information regarding how to cope with the removal/revision bump

of a specific library.

>>> Old libraries removed

DONE !

Run freebsd-version to see that you are now on stable:

freebsd-version

10.0-STABLE

*Note that freebsd-update does not work with the STABLE branch.