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NOTE: CentOS Enterprise Linux 5 is built from the Red Hat Enterprise Linux source code. Other than logo and name changes CentOS Enterprise Linux 5 is compatible with the equivalent Red Hat version. This document applies equally to both Red Hat and CentOS Enterprise Linux 5.

9.8. Changing Runlevels at Boot Time

Under Red Hat Enterprise Linux, it is possible to change the default runlevel at boot time.

To change the runlevel of a single boot session, use the following instructions:

  • When the GRUB menu bypass screen appears at boot time, press any key to enter the GRUB menu (within the first three seconds).

  • Press the a key to append to the kernel command.

  • Add <space><runlevel> at the end of the boot options line to boot to the desired runlevel. For example, the following entry would initiate a boot process into runlevel 3:

                  grub append> ro root=/dev/VolGroup00/LogVol00 rhgb quiet 3
                

 
 
  Published under the terms of the GNU General Public License Design by Interspire