aws ecr saying "Cannot perform an interactive login from a non TTY device" after copied cmd from "Amazon Container Services"

The problem is not aws but docker. The solution is on docker to use the -p parameter, and wrap the aws login call to the -p parameter as such:

docker login -u AWS -p $(aws ecr get-login-password --region the-region-you-are-in) xxxxxxxxx.dkr.ecr.the-region-you-are-in.amazonaws.com

And this requires AWS CLI version 2.

You need to install AWS CLI version 2. Follow the instructions in this link

Below steps are resolve that issue.

$curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install

$aws --version

aws-cli/2.0.30 Python/3.7.3 Linux/4.14.181-142.260.amzn2.x86_64 botocore/2.0.0dev34

$aws ecr get-login-password --region your_region | docker login --username AWS --password-stdin Account_ID.dkr.ecr.your_region.amazonaws.com

Replace your Account ID and Region.