+ * `Compatible Linux Distribution`_
+ * `Supported Linux Distributions`_
+ * `Required Packages for the Build Host`_
+
+* The recommended and tested host is Ubuntu 16.04/18.04 and CentOS 7.
+
+ * To install the required packages for Ubuntu 16.04/18.04:
+
+.. _`Compatible Linux Distribution`: https://www.yoctoproject.org/docs/2.6.3/brief-yoctoprojectqs/brief-yoctoprojectqs.html#brief-compatible-distro
+.. _`Supported Linux Distributions`: https://www.yoctoproject.org/docs/2.6.3/ref-manual/ref-manual.html#detailed-supported-distros
+.. _`Required Packages for the Build Host`: https://www.yoctoproject.org/docs/2.6.3/ref-manual/ref-manual.html#required-packages-for-the-build-host
+
+::
+
+ $ sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \
+ build-essential chrpath socat cpio python python3 python3-pip python3-pexpect \
+ xz-utils debianutils iputils-ping make xsltproc docbook-utils fop dblatex xmlto \
+ python-git
+
+ * To install the required packages for CentOS 7:
+
+::
+
+ $ sudo yum install -y epel-release
+ $ sudo yum makecache
+ $ sudo yum install gawk make wget tar bzip2 gzip python unzip perl patch \
+ diffutils diffstat git cpp gcc gcc-c++ glibc-devel texinfo chrpath socat \
+ perl-Data-Dumper perl-Text-ParseWords perl-Thread-Queue perl-Digest-SHA \
+ python34-pip xz which SDL-devel xterm
+
+
+2. Use wrapper script build_inf.sh to setup build env and build the INF AIO x86 image
+-------------------------------------------------------------------------------------
+
+::
+
+ # Get the wrapper script with either curl or wget
+ $ curl -o build_inf.sh 'https://gerrit.o-ran-sc.org/r/gitweb?p=pti/rtp.git;a=blob_plain;f=scripts/build_inf.sh;hb=HEAD'
+ $ wget -O build_inf.sh 'https://gerrit.o-ran-sc.org/r/gitweb?p=pti/rtp.git;a=blob_plain;f=scripts/build_inf.sh;hb=HEAD'
+
+ $ chmod +x build_inf.sh
+ $ WORKSPACE=/path/to/workspace
+ $ ./build_inf.sh -w ${WORKSPACE}
+
+If all go well, you will get the ISO image in:
+${WORKSPACE}/prj_oran_inf_anaconda/tmp-glibc/deploy/images/intel-corei7-64/inf-image-aio-installer-intel-corei7-64.iso
+
+3. (Optional) Use wrapper script build_oran.sh to setup build env and build the lagecy x86 image
+------------------------------------------------------------------------------------------------
+
+Note: The lagecy image is the Kubernetes Cluster image as the same one in Amber (1.0) release.
+
+::
+
+ # Get the wrapper script with either curl or wget
+ $ curl -o build_oran.sh 'https://gerrit.o-ran-sc.org/r/gitweb?p=pti/rtp.git;a=blob_plain;f=scripts/build_oran.sh;hb=HEAD'
+ $ wget -O build_oran.sh 'https://gerrit.o-ran-sc.org/r/gitweb?p=pti/rtp.git;a=blob_plain;f=scripts/build_oran.sh;hb=HEAD'
+
+ $ chmod +x build_oran.sh
+ $ WORKSPACE=/path/to/workspace_lagecy
+ $ ./build_oran.sh -w ${WORKSPACE}
+
+If all go well, you will get the ISO image in:
+${WORKSPACE}/prj_oran_inf/tmp-glibc/deploy/images/intel-x86-64/oran-image-inf-host-intel-x86-64.iso
+
+4. (Optional) Use wrapper script build_oran.sh to setup build env and build the ARM Kubernetes Cluster image
+------------------------------------------------------------------------------------------------------------
+
+Note:
+ * the ARM Kubernetes Cluster image only supports the BSP nxp-lx2xxx and is verified with the board NXP LX2160ARDB
+ * The ISO image is supported yet.
+
+::
+
+ # Get the wrapper script with either curl or wget
+ $ curl -o build_oran.sh 'https://gerrit.o-ran-sc.org/r/gitweb?p=pti/rtp.git;a=blob_plain;f=scripts/build_oran.sh;hb=HEAD'
+ $ wget -O build_oran.sh 'https://gerrit.o-ran-sc.org/r/gitweb?p=pti/rtp.git;a=blob_plain;f=scripts/build_oran.sh;hb=HEAD'
+
+ $ chmod +x build_oran.sh
+ $ WORKSPACE=/path/to/workspace_arm
+ $ ./build_oran.sh -w ${WORKSPACE} -b nxp-lx2xxx
+
+If all go well, you will get the rootfs image in:
+${WORKSPACE}/prj_oran_inf/tmp-glibc/deploy/images/nxp-lx2xxx/oran-image-inf-host-nxp-lx2xxx.tar.bz2