5.2.3. /proc/cmdline
This file shows the parameters passed to the kernel at the time it is started. A sample
/proc/cmdline
file looks like the following:
ro root=/dev/VolGroup00/LogVol00 rhgb quiet 3
This tells us that the kernel is mounted read-only (signified by
(ro)
), located on the first logical volume (LogVol00
) of the first volume group (/dev/VolGroup00
). LogVol00
is the equivalent of a disk partition in a non-LVM system (Logical Volume Management), just as /dev/VolGroup00
is similar in concept to /dev/hda1
, but much more extensible.
For more information on LVM used in Red Hat Enterprise Linux, refer to http://www.tldp.org/HOWTO/LVM-HOWTO/index.html.
Next,
rhgb
signals that the rhgb
package has been installed, and graphical booting is supported, assuming /etc/inittab
shows a default runlevel set to id:5:initdefault:
.
Finally,
quiet
indicates all verbose kernel messages are suppressed at boot time.