Davoud Teimouri

Virtualization & Datacenter

[Review]: Ubuntu 18.04 LTS (Bionic Beaver)

Ubuntu 18.04 LTS out now

Ubuntu is most popular Linux distributions that designed for desktop, server and cloud environments. The latest LTS (Long Term Support) version out now. Ubuntu LTS release every two years and LTS version offers five year support. The below table shows active Ubuntu versions:

Version

Code name

Docs

Release date

End of Life date

 

Ubuntu 17.10

Artful Aardvark

Rel

October 19, 2017

July 2018

 

Ubuntu 16.04.4 LTS

Xenial Xerus

Changes

March 1, 2018

April 2021

 

Ubuntu 16.04.3 LTS

Xenial Xerus

Changes

August 3, 2017

April 2021

 

Ubuntu 16.04.2 LTS

Xenial Xerus

Changes

February 16, 2017

April 2021

 

Ubuntu 16.04.1 LTS

Xenial Xerus

Changes

July 21, 2016

April 2021

 

Ubuntu 16.04 LTS

Xenial Xerus

Rel

April 21, 2016

April 2021

 

Ubuntu 14.04.5 LTS

Trusty Tahr

Changes

August 4, 2016

April 2019

 

Ubuntu 14.04.4 LTS

Trusty Tahr

Changes

February 18, 2016

HWE August 2016

 

Ubuntu 14.04.3 LTS

Trusty Tahr

Changes

August 6, 2015

HWE August 2016

 

Ubuntu 14.04.2 LTS

Trusty Tahr

Changes

February 20, 2015

HWE August 2016

 

Ubuntu 14.04.1 LTS

Trusty Tahr

Changes

July 24, 2014

April 2019

 

Ubuntu 14.04 LTS

Trusty Tahr

Rel

April 17, 2014

April 2019

 

New Features and Improvements in Ubuntu 18.04

Each new release of Ubuntu has new features, so there is some new features in Ubuntu 18.04 same as ancestors.

Linux kernel 4.15

Ubuntu 18.04 ships with a v4.15 based Linux kernel, enabling the latest hardware and peripherals available from IBM, Intel, and others. The 18.04 kernel delivers new features inherited from upstream, including:

  • CPU controller for the cgroup v2 interface
  • AMD secure memory encryption support
  • The latest MD driver with software RAID enhancements
  • Improved power management for systems with SATA Link Power Management

We also see notable Ubuntu specific achievements with:

  • Linux security module stacking support
  • Support for signing of POWER host and NV kernels
  • Backport improved support for IBM and Intel hardware from Linux 4.16

OpenJDK

As of 18.04 release, OpenJDK 10 is the default JRE/JDK. Once OpenJDK 11 reaches GA in September 2018, it will become the default in 18.04.

OpenJDK 8 has moved to universe and will remain available there for the life of 18.04, to provide migration time for packages, custom applications, or scripts that can’t be build with OpenJDK 10 or 11. OpenJDK 8 will be updated in 18.04 until Ubuntu 16.04 LTS reaches EOL in April 2021.

Security Improvements

In Ubuntu 18.04 LTS, gcc is now set to default to compile applications as position independent executables (PIE) as well as with immediate binding, to make more effective use of Address Space Layout Randomization (ASLR). All packages in main have been rebuilt to take advantage of this, with a few exceptions.

Mitigations are in place to protect against Spectre and Meltdown.

bolt and thunderbolt-tools have been promoted to main to provide security controls for Thunderbolt devices.

Default CIFS/SMB protocol version change in CIFS mounts

Since 17.10, the default SMB protocol used when mounting remote CIFS filesystems via mount.cifs (from the cifs-utils package) changed to 2.1 or higher, depending on what is negotiated with the server.

Network configuration

Teaming support has been added to Network Manager by libteam.

There is many other features and enhancements in the new release that you can find them on the release note document.

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Davoud Teimouri is as a professional blogger, vExpert 2015/2016/2017/2018, VCA, MCITP. This blog is started with simple posts and now, it has large following readers.

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