Installation guide

To verify that this is the problem you are experiencing, run the following command:

df -h

The df command should help you diagnose which partition is full. For additional information

about df and an explanation of the options available (such as the -h option used in this ex-

ample), refer to the df man page by typing man df at a shell prompt.

A key indicator is 100% full or a percentage above 90% or 95% on a partition. The /home/ and /

tmp/ partitions can sometimes fill up quickly with user files. You can make some room on that

partition by removing old files. After you free up some disk space, try running X as the user that

was unsuccessful before.

4.5. Problems When You Try to Log In

If you did not create a user account in the Setup Agent, log in as root and use the password

you assigned to root.

If you cannot remember your root password, boot your system as linux single.

Itanium users must enter boot commands with elilo followed by the boot command.

If you are using an x86-based system and GRUB is your installed boot loader, type e for edit

when the GRUB boot screen has loaded. You are presented with a list of items in the configura-

tion file for the boot label you have selected.

Choose the line that starts with kernel and type e to edit this boot entry.

At the end of the kernel line, add:

single

Press Enter to exit edit mode.

Once the boot loader screen has returned, type b to boot the system.

Once you have booted into single user mode and have access to the # prompt, you must type

passwd root, which allows you to enter a new password for root. At this point you can type shut-

down -r now to reboot the system with the new root password.

If you cannot remember your user account password, you must become root. To become root,

type su - and enter your root password when prompted. Then, type passwd <username>. This al-

lows you to enter a new password for the specified user account.

If the graphical login screen does not appear, check your hardware for compatibility issues. The

Hardware Compatibility List can be found at:

http://hardware.redhat.com/hcl/

4.6. Is Your RAM Not Being Recognized?

Sometimes, the kernel does not recognize all of your memory (RAM). You can check this with

4.5. Problems When You Try to Log In