pxe-boot.markdown

@@ -68,6 +68,7 @@ chkconfig dhcpd on
 ### prepare root filesystem for server
 
 ```
+mkdir -p /var/lib/tftpboot/computenode08/centos6/root/
 yum -y --releasever=6.5 groupinstall "Base" "Server Platform" --installroot=/var/lib/tftpboot/computenode08/centos6/root/
 yum -y install openssh-server openssh-clients --installroot=/var/lib/tftpboot/computenode08/centos6/root/
 ```