MOUNT_KERNFS(8)

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

# NAME

`mount_kernfs` —
mount the /kern file system

# SYNOPSIS

`mount_kernfs` | [`-o` options] /kern mount_point

# DESCRIPTION

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.

# FILES

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 ASCII).
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`”

# SEE ALSO

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

# HISTORY

The `mount_kernfs` utility first appeared in 4.4BSD.

# BUGS

This filesystem may not be NFS-exported.

March 22, 2012 | NetBSD 9.3