Q and A Fedora 9

# Make pdf document error.
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[q.yang@localhost DocBook]$ make pdfdocs
make: *** No rule to make target `/scripts/kernel-doc', needed by `/wanbook.xml'. Stop.

[q.yang@localhost linux-2.6.27.8]$ make pdfdocs
HOSTCC scripts/basic/fixdep
HOSTCC scripts/basic/docproc
DOCPROC Documentation/DocBook/wanbook.xml
PDF Documentation/DocBook/wanbook.pdf
*** You have to install docbook-utils or xmlto ***
make[1]: *** [Documentation/DocBook/wanbook.pdf] Error 1
make: *** [pdfdocs] Error 2
[q.yang@localhost linux-2.6.27.8]$ yum install docbook-utils
[root@localhost linux-2.6.27.8]# yum install xmlto