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FreeBSD 11.0 - man page for freebsd-version (freebsd section 1)

FREEBSD-VERSION(1)					    BSD General Commands Manual 					FREEBSD-VERSION(1)

freebsd-version -- print the version and patch level of the installed system
freebsd-version [-ku]
The freebsd-version utility makes a best effort to determine the version and patch level of the installed kernel and / or userland. The following options are available: -k Print the version and patch level of the installed kernel. Unlike uname(1), if a new kernel has been installed but the system has not yet rebooted, freebsd-version will print the version and patch level of the new kernel. -u Print the version and patch level of the installed userland. These are hardcoded into freebsd-version during the build. If both -k and -u are specified, freebsd-version will print the kernel version first, then the userland version, on separate lines. If nei- ther is specified, it will print the userland version only.
The freebsd-version utility should provide the correct answer in the vast majority of cases, including on systems kept up-to-date using freebsd-update(8), which does not update the kernel version unless the kernel itself was affected by the latest patch. To determine the name (and hence the location) of a custom kernel, the freebsd-version utility will attempt to parse /boot/defaults/loader.conf and /boot/loader.conf, looking for definitions of the kernel and bootfile variables, both with a default value of ``kernel''. It may however fail to locate the correct kernel if either or both of these variables are defined in a non-standard location, such as in /boot/loader.rc.
ROOT Path to the root of the filesystem in which to look for loader.conf and the kernel.
To determine the version of the currently running userland: /bin/freebsd-version -u To inspect a system being repaired using a live CD: mount -rt ufs /dev/ada0p2 /mnt env ROOT=/mnt /mnt/bin/freebsd-version -ku
uname(1), loader.conf(5), freebsd-version(8)
The freebsd-version command appeared in FreeBSD 10.0.
The freebsd-version utility and this manual page were written by Dag-Erling Smorgrav <>.
October 5, 2013 BSD