diff --git a/Odroid-N2/first.md b/Odroid-N2/first.md
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+Check if u-boot is included in 
+
+
+
+
+
+
+### References
+
+#### Board Specific U-Boot Details
+https://u-boot.readthedocs.io/en/latest/board/amlogic/odroid-n2.html
+
+#### U-boot
+https://u-boot.readthedocs.io/en/latest/build/gcc.html
+
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,3 +1,15 @@
 # SBC-Testing
 
-Collection of info about different SBCs and how-to port them to Rocky LInux
\ No newline at end of file
+Collection of info about different SBCs and how-to port them to Rocky LInux
+
+
+## Build Environment Setup on Ubuntu 20
+``wget https://releases.linaro.org/components/toolchain/binaries/latest-6/aarch64-elf/gcc-linaro-6.50-201812-x86_64_aarch64-elf.tar.xz```
+
+```sudo tar xvf gcc-linaro-6.5.0-2018.12-x86_64_aarch64-elf.tar.xz -C /opt/toolchains/```
+
+```vi ~/.bashrc & add:
+  export ARCH=arm64
+  export CROSS_COMPILE=aarch64-elf-
+  export PATH=/opt/toolchains/gcc-linaro-6.5.0-2018.12-x86_64_aarch64-elf/bin:$PATH
+source ~/bashrc```
\ No newline at end of file