The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.
The following table lists commonly-used kernel boot parameters.
Option | Description |
---|---|
|
Specifies the run level, overriding the value set in
|
KEYBOARDTYPE= |
Specifies the keyboard type, which is written to
|
|
Specifies the keyboard layout, which is written to
|
|
Specifies the system language and code set, which is
written to |
|
Specifies the number of loop devices
( |
| Disables Ksplice Uptrack updates from being applied to the kernel. |
| Reduces debugging output. |
| Activates an encrypted Linux Unified Key Setup (LUKS) partition with the specified UUID. |
| Specifies an LVM volume group and volume to be activated. |
| Disables detection of an encrypted LUKS partition. |
| Specifies that the Red Hat graphical boot display should be used to indicate the progress of booting. |
| Disables Device-Mapper (DM) RAID detection. |
| Disables Multiple Device (MD) RAID detection. |
|
Specifies that the root file system is to be mounted
read only, and specifies the root file system by the
device path of its LVM volume (where
|
|
Specifies that the root ( |
| Disables SELinux. |
single | Boots the computer in single-user mode, without prompting for the
root password. |
SYSFONT= | Specifies the console font, which is written to
/etc/sysconfig/i18n in the
initramfs . |
The kernel boot parameters that were last used to boot a
system are recorded in /proc/cmdline
, for
example:
# cat /proc/cmdline
ro root=/dev/mapper/VolGroup-lv_root rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us
LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=VolGroup/lv_swap SYSFONT=latarcyrheb-sun16
rd_LVM_LV=VolGroup/lv_root rd_NO_DM rhgb quiet selinux=0