Introduction
These release notes for Ubuntu 18.04 LTS (Bionic Beaver) provide an overview of the release and document the known issues with Ubuntu 18.04 LTS and its flavors
Support lifespan
The 'main' archive of Ubuntu 18.04 LTS will be supported for 5 years until April 2023. Ubuntu 18.04 LTS will be supported for 5 years for Ubuntu Desktop, Ubuntu Server, and Ubuntu Core. Ubuntu Studio 18.04 will be supported for 9 months. All other flavors will be supported for 3 years.
How To Download :
How to Install :
Insert an installation disk for Ubuntu 18.04 and reboot your computer. Then, Installer will start like follows. First, Choose your language.
Select your keyboard type you are using.
Select Installation options. Generally, it's OK to select [Install Ubuntu]. For [Install MaaS ***], they are for MaaS (Metal as a Service) Cloud System.
Select a network interfaces to be used during this installation.
If your local network needs proxy server to access to the Internet, input the address of it. If not, Enter without inputting anything
This is the section for configuring partitions. If you'd like to set with manual, select [Manual], if not, select [Use An Entire Disk]. On this example, procced with [Use An Entire Disk].
Select a disk you'd like to install Ubuntu.
This is the section for configuring filesystem. If you'd like to change something values, Select [Reset], if not, select [Done].
The warnings is shown that existing data in the disk you selected for Ubuntu installation are lost all because it is formatted. If no ploblem, Select [Continue] to proceed.
This is the section for configuring user account. The user configured on here will be set as an administrative account by default. Input Full name of a user, this server's Hostname, user account name, password for him. For bottom section, if you'd like to import SSH key from Github or Launchpad, select it.
After installation has been finished, following screen is shown. Select [Reboot Now] to restart System.
After System has been reboot and shown the login prompt, input a username and password you configured during installation to login to Ubuntu Server. It's OK to complete to install Ubuntu If logined normally like follows.
New features in 18.04
Updated Packages
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. See the Spectre and Meltdown KnowledgeBase article for more details about the remediation and configuration options.
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. If no version is specified when mounting such a remote share, the following will be logged:
No dialect specified on mount. Default has changed to a more secure dialect, SMB2.1 or later (e.g. SMB3),
from CIFS (SMB1). To use the less secure SMB1 dialect to access old servers which do not support SMB3
(or SMB2.1) specify vers=1.0 on mount.
Should you encounter compatibility issues, like #1764778 or #1572132, please specify vers=1.0 when mounting the share and please file a bug if that fixes the problem for you.
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