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3.3. Special File Locations

Red Hat Linux extends the FHS structure slightly to accommodate special files.

Most files pertaining to the Red Hat Package Manager (RPM) are kept in the /var/lib/rpm/ directory. For more information on RPM see the chapter titled Package Management with RPM in the Red Hat Linux Customization Guide.

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 the system. For more information on Red Hat Network, refer to 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 4 The sysconfig Directory for more information about 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.

WarningWarning
 

Do not remove the /initrd/ directory for any reason. Removing this directory will cause the system to fail to boot with a kernel panic error message.

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