I am trying to run an update of freebsd10 and I am being asked for the kernel sources

===>>> Launching child to update lsof-4.89.b,8 to lsof-4.89.d,8

===>>> All >> lsof-4.89.b,8 (9/9)

===>>> Currently installed version: lsof-4.89.b,8
===>>> Port directory: /usr/ports/sysutils/lsof

        ===>>> This port is marked IGNORE
        ===>>> requires kernel sources

        ===>>> If you are sure you can build it, remove the
               IGNORE line in the Makefile and try again.

===>>> Update for lsof-4.89.b,8 failed
===>>> Aborting update

but sysinstall no longer exist

sysinstall: not found

What is the new method of installing the kernel sources in FreeBSD10?

I thought bsdinstall, but it only tries to chop up my disk which I do not want enter image description here

  • You're fairly evidently not updating FreeBSD if you are upgrading a third-party port by the name of sysutils/lsof. Even aside from the fact that this is happening in /usr/ports, the actual FreeBSD operating system command is fstat. Which are you actually trying to do: upgrade the ports collection? or upgrade the operating system? Because they are two different answers and two different chapters of the FreeBSD Handbook. Yes, this is all in the Handbook.
    – JdeBP
    May 22, 2015 at 6:21
  • lsof was looking for them and I really just wanted them. I am not shy about a kernel, but the info is no where to be found. Just getting the current kernel sources.
    – nix
    May 24, 2015 at 2:27

3 Answers 3


You can manually download and extract a tarball of the full source tree for your specific release from ftp://ftp.freebsd.org/pub/FreeBSD/releases/


fetch ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/10.2-RELEASE/src.txz

tar -C / -xzvf src.txz

10.2-RELEASE MUST be replaced with correct version of your OS.

One can find version using command: freebsd-version -k

The minor versions should be ignored to fetch from the above URL. For ex: if it is 10.2-RELEASE-p1, just use: 10.2-RELEASE

  • This is the right answer.
    – mghaoui
    Jan 18, 2018 at 19:42
  • 2
    Works with FreeBSD 11.2.
    – user302826
    Jul 30, 2018 at 17:13
  • 1
    Note that the -z option is unnecessary here, as tar will autodetect the input format. Per the man page, In extract or list modes, this option is ignored. I also like doing this inline: fetch -o- ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/X.Y-RELEASE/src.txz | sudo tar -C / -xvf -. No need to store src.txz locally.
    – ghoti
    Sep 25, 2018 at 20:51

A bit more generic solution:

fetch -o /tmp ftp://ftp.freebsd.org/pub/`uname -s`/releases/`uname -m`/`uname -r | cut -d'-' -f1,2`/src.txz

tar -C / -xvf /tmp/src.txz

And you can replace /tmp with your favorite directory to download things into.


svn checkout https://svn.freebsd.org/base/releng/`uname -r | cut -d'-' -f1,1` /usr/src

You can do it:

git clone https://github.com/freebsd/freebsd.git /usr/src
cd /usr/src; make clean
  • 2
    For future searchers, this will pull down a significant amount of additional data (git stuff) that's not needed for actual building from source. J. Delgado's answer is the canonical and most efficient method. Mar 1, 2018 at 7:34

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