Updated: 2021/Apr/14

MOUNT_KERNFS(8)             System Manager's Manual            MOUNT_KERNFS(8)

     mount_kernfs - mount the /kern file system

     mount_kernfs [-o options] /kern mount_point

     The mount_kernfs command attaches an instance of the kernel parameter
     namespace to the global filesystem namespace.  The conventional mount
     point is /kern.  The directory specified by mount_point is converted to
     an absolute path before use.  This command is normally executed by
     mount(8) at boot time.

     The filesystem includes several regular files which can be read, some of
     which can also be written.  The contents of the files is in a machine-
     independent format, either a string, or an integer in decimal ASCII.
     Where numbers are returned, a trailing newline character is also added.

     The options are as follows:

     -o      Options are specified with a -o flag followed by a comma
             separated string of options.  See the mount(8) man page for
             possible options and their meanings.

     boottime   the time at which the system was last booted (decimal ASCII).
     copyright  kernel copyright message.
     hostname   the hostname, with a trailing newline.  The hostname can be
                changed by writing to this file.  A trailing newline will be
                stripped from the hostname being written.
     hz         the frequency of the system clock (decimal ASCII).
     loadavg    the 1, 5 and 15 minute load average in kernel fixed-point
                format.  The final integer is the fix-point scaling factor.
                All numbers are in decimal ASCII.
     msgbuf     the kernel message buffer, also read by syslogd(8), through
                the log device, and by dmesg(8).
     pagesize   the machine pagesize (decimal ASCII).
     physmem    the number of pages of physical memory in the machine (decimal
     rootdev    the root device.
     rrootdev   the raw root device.
     time       the second and microsecond value of the system clock.  Both
                numbers are in decimal ASCII.
     version    the kernel version string.  The head line for /etc/motd can be
                generated by running: "sed 1q /kern/version"

     mount(2), unmount(2), fstab(5), dmesg(8), mount(8), setkey(8), syslogd(8)

     The mount_kernfs utility first appeared in 4.4BSD.

     This filesystem may not be NFS-exported.

NetBSD 9.99                     March 22, 2012                     NetBSD 9.99