download dot-net runtime for dot-net 6.0 and dot-net 8.0
sudo tar -xzvf dotnet-sdk-6.0.427-linux-x64.tar.gz -C /usr/share/dotnet
sudo tar -xzvf dotnet-sdk-8.0.100-linux-x64.tar.gz -C /usr/share/dotnet
Create symi link
sudo ln -sf /usr/share/dotnet/dotnet /usr/bin/dotnet
export DOTNET_ROOT=/usr/share/dotnet
export PATH=$PATH:$DOTNET_ROOT:$DOTNET_ROOT/tools
echo 'export DOTNET_ROOT=/usr/share/dotnet' >> ~/.bashrc
echo 'export PATH=$PATH:$DOTNET_ROOT:$DOTNET_ROOT/tools' >> ~/.bashrc
source ~/.bashrc
if you face dotnet-sdk not found error use apt pagage to install