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MOUNT_KERNFS(8) FreeBSD 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. FreeBSD 14.1-RELEASE-p8 March 22, 2012 FreeBSD 14.1-RELEASE-p8