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).
ipsecsa
-
the directory that contains IPsec security associations (SA) in
PF_KEY
format.
Filenames are SPI in decimal number.
The content of files can be inspected by using
setkey(8).
ipsecsp
-
the directory that contains IPsec security policies in
PF_KEY
format.
Filenames are security policy ID in decimal number.
The content of files can be inspected by using
setkey(8).
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),
ipsec(4),
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.
lkm(4)
version does not support IPsec-related files/directories.