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33 .Nd print the version and patch level of the installed system
40 utility makes a best effort to determine the version and patch level
41 of the installed kernel and / or userland.
43 The following options are available:
46 Print the version and patch level of the installed kernel.
49 if a new kernel has been installed but the system has not yet
52 will print the version and patch level of the new kernel.
54 Print the version and patch level of the running kernel.
57 this is unaffected by environment variables.
59 Print the version and patch level of the installed userland.
60 These are hardcoded into
65 If several of the above options are specified,
67 will print the installed kernel version first, then the running kernel
68 version, and finally the userland version, on separate lines.
69 If neither is specified, it will print the userland version only.
70 .Sh IMPLEMENTATION NOTES
73 utility should provide the correct answer in the vast majority of
74 cases, including on systems kept up-to-date using
75 .Xr freebsd-update 8 ,
76 which does not update the kernel version unless the kernel itself was
77 affected by the latest patch.
79 To determine the name (and hence the location) of a custom kernel, the
81 utility will attempt to parse
82 .Pa /boot/defaults/loader.conf
84 .Pa /boot/loader.conf ,
85 looking for definitions of the
89 variables, both with a default value of
91 It may however fail to locate the correct kernel if either or both of
92 these variables are defined in a non-standard location, such as in
97 Path to the root of the filesystem in which to look for
102 To determine the version of the currently running userland:
103 .Bd -literal -offset indent
104 /bin/freebsd-version -u
107 To inspect a system being repaired using a live CD:
108 .Bd -literal -offset indent
109 mount -rt ufs /dev/ada0p2 /mnt
110 env ROOT=/mnt /mnt/bin/freebsd-version -ku
123 utility and this manual page were written by
124 .An Dag-Erling Sm\(/orgrav Aq Mt des@FreeBSD.org .