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Version number & Name

 

 年.月

22.04 - Jammy Jellyfish

20.04 - Focal Fossa

18.04 - Bionic Beaver

16.04 - Xenial Xerus

14.04 - Trusty Tahr

12.04 - Precise Pangolin

 

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LTS

 

• Supported for five years
• Business and enterprise users can get "extended maintenance release" (ESM) support for 10 years.

 

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22.04 LTS

• kernel v5.15
• UDP disabled for NFS mounts
• nftables is now the default backend for the firewall.

LAMP

• PHP 8.1
• Apache  2.4.52
• MySQL 8.0

Hypervisor

• Qemu v6.2.0
• Libvirt v8.0.0
• Openvswitch 2.17.0

Container

• lxd
• lxc (5.0)

HA

• Corosync (3.16)
• Pacemaker (2.1.2)

 

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20.04 LTS

 

• Linux Kernel 5.4
• Kernel and initramfs compression algorithm has changed to lz4
• Networking: netplan.io
• FS: ZFS 0.8.3
• Developer: Python 3.8.2 + Python 2.7(universe)
• Snap-based Ubuntu Software app
• SSH two-factor authentication
• AppArmor 3

Lamp

• php 7.4,
• MySQL (v8.0)
• NGINX (v1.17)

Hypervisor

• QEMU (v4.2)
• Libvirt (v6.0)
• Openvswitch (2.13)

Container

• lxd
• lxc

 

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18.04 LTS

 

• Linux Kernel 4.15
• QEMU 2.11.1 libvirt 4.0
• ships with LXD 3.0
• New default networking queue management algorithms
• BTRFS swap file support
• swap file will be used by default instead of a swap partition
• New block I/O latency controller
• shiftfs filesystem providing LXD performance improvements
• The default DNS resolver is systemd-resolved.
• Python 3.6, Nginx 1.14.0, PHP 7.2, Apache 2.4.29

 

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16.04 LTS

 

 

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14.04 LTS

* 64-bit only
* Linux kernel 3.13

* Open vSwitch 2.0.1
* ship only Python 3 ( Python 2 = python package)

* Ceph 0.79 ( distributed object store and file system designed to provide excellent performance, reliability and scalability )

* Qemu 2
* Libvirt 1.2.2
* LXC 1.0

* MAAS 1.5 (Metal as a Service)
 - MAAS turns your bare metal into an elastic cloud-like resource.

* juju
 - Juju enables you to use Charms to deploy your application architectures to EC2, OpenStack, Azure
   Juju Charms define applications as services. There are 100s of Charms already created by application experts.
    = hadoop
    = mysql
    =ceph

* Apache 2.4
* PHP 5.5

* AppArmor 2.8.95

DB:

• Percona XtraDB Cluster 5.5
• MariaDB 5.5
• MariaDB 5.5

* strongSwan