Installation guide

22 Chapter 1. File System Structure
The /var/spool/up2date/ directory contains files used by Red Hat Update Agent, including
RPM header information for the system. This location may also be used to temporarily store RPMs
downloaded while updating your system. For more information on Red Hat Network, see the Red Hat
Network website at https://rhn.redhat.com/.
Another location specific to Red Hat Linux is the /etc/sysconfig/ directory. This directory stores
a variety of configuration information. Many scripts that run at boot time use the files in this directory.
See Section 3.7 for more information on what is within this directory and the role these files play in
the boot process.
Finally, one more directory worth noting is the /initrd/ directory. It is empty, but is used as a critical
mount point during the boot process.
Warning
Do not remove the /initrd/ directory for any reason. Removing this directory will cause your system
to fail to boot with a kernel panic error message.