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Update README.md #11432

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13 changes: 13 additions & 0 deletions README.md
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Expand Up @@ -112,6 +112,19 @@ sudo pip3 install j2cli
* Install [Docker](https://docs.docker.com/engine/install/) and configure your system to allow running the 'docker' command without 'sudo':
* Add current user to the docker group: `sudo gpasswd -a ${USER} docker`
* Log out and log back in so that your group membership is re-evaluated
* The image build followed after the platform configuration fails with containerd running on cgroupv2.
It should be changed to run with cgroupv1.
For .deb based distros edit grub (/etc/default/grub) to have `systemd.unified_cgroup_hierarchy=0` in `GRUB_CMDLINE_LINUX`
For EL distros updated the kernel with:
```
sudo apt install -y grubby && \
sudo grubby \
--update-kernel=ALL \
--args="systemd.unified_cgroup_hierarchy=0"
```

* Platform configuration step fails due to sairedis being missing (https://github.com/Azure/sonic-sairedis/issues/697#issuecomment-731498253).
This can be circumvented by cloning the sonic-sairedis (/Azure/sonic-sairedis.git) into the cloned "sonic-buildimage" directory and running a recursive submodule update within the directory (`git submodule update --init --recursive`)

## Clone or fetch the code repository with all git submodules
To clone the code repository recursively, assuming git version 1.9 or newer:
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