The primary differences in between Amazon Linux 2 LTS Candidate 2 and Amazon Linux 2 LTS Candidate (2017.12) are the inclusion of a newer kernel (4.14), compiler (gcc 7.3), C library (glibc 2.26) and tools (binutils 2.29.1).

Note: Amazon Linux 2 is currently available as an LTS release candidate. Long-term support will only apply to the final LTS build, to be announced at a later time.

Similar to the previous LTS Candidate, Amazon Linux 2 LTS Candidate 2 provides virtual machine images for on-premises development and testing and the systemd service and systems manager (in place of System V init). Due to the inclusion of new components such as systemd in Amazon Linux 2, applications running on Amazon Linux AMI may require changes to run on Amazon Linux 2. Amazon Elastic Compute Cloud (Amazon EC2) instances running Amazon Linux will not be upgradeable to Amazon Linux 2 through rolling upgrade mechanisms.

Amazon Linux 2 LTS Candidate 2 uses the systemd 219 init system to bootstrap userspace and manage system processes. It is available as /sbin/init and replaces the System V-style init system that was available in the previous generation of Amazon Linux. As a result, initscripts no longer exist in /etc/init.d. systemctl {start|stop|restart} SERVICE_NAME.service needs to be used in its place. Additionally, service SERVICE_NAME {start|stop|restart} is compatible with both Amazon Linux AMI and Amazon Linux 2.

Amazon Linux 2 Extras introduces the notion of topics to select software bundles. Each topic contains all the dependencies required for the software to install and function on Amazon Linux 2. The packages associated with topics are consumed with the yum package manager. The base image of Amazon Linux 2 includes access to repositories with popular packages. With the availability of newer software bundles as topics, Extras provides a mechanism to have the latest application software on a stable base of Amazon Linux 2 thereby invalidating the need to compromise between OS stability and software “freshness”.

Usage examples follow:-

List the available topics:
$ amazon-linux-extras

Installing a topic:
$ sudo amazon-linux-extras install <topic name>

Example:
$ sudo amazon-linux-extras install rust1

Amazon Linux 2 LTS Candidate 2 comes with gcc 7.3, glibc 2.26, and binutils 2.29.1

Amazon Linux 2 LTS Candidate 2 comes with Linux kernel 4.14.

In Amazon Linux 2, /bin, /sbin, /lib, and /lib64 are symlinks to /usr/bin, /usr/sbin, /usr/lib, and /usr/lib64, respectively. Packages that have Requires on specific binaries in /bin, will not resolve. This can be mitigated using the following logic:

%if 0%{?amzn} == 1
Requires: /bin/grep
%else
Requires: /usr/bin/grep
%endif

Amazon Linux 2 uses cloud-init 0.7.9 to handle initialization.

Amazon Linux 2 LTS Candidate 2017.12 does not come with a GUI based web browser. Both curl and lynx are available. Firefox will be made available through a future update.

ap-northeast-1

ami-3dbcb441 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-8fbab2f3 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-8bbab2f7 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

ap-northeast-2

ami-deb916b0 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-96b916f8 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-6db71803 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

ap-northeast-3

ami-2237395f amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-ff353b82 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-25373958 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

ap-south-1

ami-28560c47 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-e5441e8a amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-24550f4b amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

ap-southeast-1

ami-4db5ec31 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-3eb0e942 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-b4b0e9c8 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

ap-southeast-2

ami-6b62ae09 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-8267abe0 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-4462ae26 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

ca-central-1

ami-35ae2851 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-e8a0268c amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-b2af29d6 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

eu-central-1

ami-104419fb amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-b144195a amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-08471ae3 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

eu-west-1

ami-86c695ff amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-38c09341 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-68c29111 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

eu-west-2

ami-598b6a3e amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-b98667de amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-5b8b6a3c amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

eu-west-3

ami-f22c9a8f amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-bf17a1c2 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-af2b9dd2 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

sa-east-1

ami-a77225cb amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-7f712613 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-1b7b2c77 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

us-east-1

ami-b270a8cf amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-f973ab84 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-3b74ac46 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

us-east-2

ami-9bc0f1fe amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-31c7f654 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-b0c6f7d5 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

us-west-1

ami-62405102 amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-be4051de amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-964352f6 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

 

us-west-2

ami-d2f06baa amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-ebs

ami-07eb707f amzn2-ami-hvm-2017.12.0.20180328.1-x86_64-gp2

ami-7beb7003 amzn2-ami-minimal-hvm-2017.12.0.20180328.1-x86_64-ebs

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