I am trying to create an AWS Lambda function using the command
aws lambda create-function \\ --function-name foo\\ --runtime nodejs\\ --role lambda_basic_e
I've had the same issue on Ubuntu 18.04 and what did the trick was enclosing both the name of the function and the fileb:/// with double " quotes.
fileb:///
"
aws lambda update-function-code --function-name "FUNCTION" --zip-file "fileb:///an/absolute/path/to/your/lambda/FUNCTION.zip"