In AWS I need to add amazon linux instance to domain based on this article. However how do i know which Amazon Linux version the instance is using. I do not have access to AWS console. But i do have access to actual instance. What linux command i should be using.
I use uname -srm command which returns Linux 4.4.0-1057-aws x86_64
Not sure if this is Amazon Linux 1 or Amazon Linux 2
You can use /etc/os-release file to get the info about Amazon Linux Version, the machine is running.
In case of Amazon 1
[ec2-user@ip-x-x-x- ~]$ cat /etc/os-release
NAME="Amazon Linux AMI"
VERSION="2018.03"
ID="amzn"
ID_LIKE="rhel fedora"
VERSION_ID="2018.03"
PRETTY_NAME="Amazon Linux AMI 2018.03"
ANSI_COLOR="0;33"
CPE_NAME="cpe:/o:amazon:linux:2018.03:ga"
HOME_URL="http://aws.amazon.com/amazon-linux-ami/"
In case of Amazon 2
[ec2-user@x-x-x-x ~]$ cat /etc/system-release
Amazon Linux release 2.0 (2017.12) LTS Release Candidate
[ec2-user@fresh-amazon-host ~]$ cat /etc/os-release
NAME="Amazon Linux"
VERSION="2.0 (2017.12)"
ID="amzn"
ID_LIKE="centos rhel fedora"
VERSION_ID="2.0"
PRETTY_NAME="Amazon Linux 2.0 (2017.12) LTS Release Candidate"
ANSI_COLOR="0;33"
CPE_NAME="cpe:2.3:o:amazon:amazon_linux:2.0"
HOME_URL="https://amazonlinux.com/"
As you can clearly see the two different versions, mentioned as Amazon Linux and Amazon Linux 2.0
$ cat /etc/system-release
or
$ cat /etc/issue
or
$ uname -a
and head for https://aws.amazon.com/amazon-linux-ami/
You can use the following command:
rpm -E %{rhel}
For Operating System: Amazon Linux 2
The answer is : 7
Here's a one-liner.
awk -F '[="]*' '/^PRETTY_NAME/ { print $2 }' < /etc/os-release
It prints out:
Amazon Linux 2
Well, the announcement in: https://aws.amazon.com/about-aws/whats-new/2017/12/introducing-amazon-linux-2 states that it uses a 4.9 kernel. Yours is older, so I would say it is Linux 1.
Still, the following call from the terminal should give you the AMI ID and you could do a search on that(see docs at https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html):
curl http://169.254.169.254/latest/meta-data/ami-id