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Red Hat extends the FHS structure slightly to accommodate special files used by Red Hat Linux. Most files pertaining to the Red Hat Package Manager (RPM) are kept in the /var/lib/rpm/ directory. For more information on RPM, see Chapter 6.
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 Update Agent and 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 Chapter 2 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 it 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. |
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