1. Enterprise
Linux
Toshaan
Bharvani
Defining
Enterprise
Linux Enterprise Linux
Market
Open Space
overview
RHEL Toshaan Bharvani
CentOS
SLES
<toshaan@vantosh.com>
Ubuntu LTS
Overview
The End
11 April 2010
Enterprise Linux Toshaan Bharvani 1 / 13

2. Enterprise
Linux Table of contents
Toshaan
Bharvani
Defining
Enterprise
Linux
Market 1 Defining Enterprise Linux
overview
RHEL
CentOS
SLES
Ubuntu LTS
2 Market overview
Overview RHEL
The End CentOS
SLES
Ubuntu LTS
Overview
Enterprise Linux Toshaan Bharvani 2 / 13

3. Enterprise
Linux
Toshaan
Bharvani
Defining
Enterprise
Linux
Market
overview
RHEL 1
CentOS
SLES
Ubuntu LTS Defining Enterprise Linux
Overview
The End
Enterprise Linux Toshaan Bharvani 3 / 13

4. Enterprise
Linux What is Enterprise Linux
Toshaan
Bharvani
Defining
Enterprise
Linux
Support for long term (5 or more years)
Market Security updates are backported
overview
RHEL Reliable environment with minimal change : ABI/API
CentOS stability
SLES
Ubuntu LTS Patches are backported
Overview
Regular bugfix/enhancement update packs
The End
Support for mainstream platform & technology
Certified for software, hardware and certain environments
(eg. EAL4+, LSB, health, space, . . . )
Reliable, predictable and reproducable ⇒ maintenance is
low
Enterprise Linux Toshaan Bharvani 4 / 13

5. Enterprise
Linux Where is Enterprise Linux used?
Toshaan
Bharvani
Defining
Enterprise
Linux
Market
Average lifespan of pc’s in the enterprise :
overview Business desktops : 3 to 5 years
RHEL
Business laptop : 3 years
CentOS
SLES
Business workstation : 5 to 7 years
Ubuntu LTS Average business pc does not have the latest technology
Overview
The End
Business does not like to change software or hardware a lot
Applications need to keep on running
Stability and continuity are key words
Security is an important issue !
Enterprise Linux Toshaan Bharvani 5 / 13

6. Enterprise
Linux
Toshaan
Bharvani
Defining
Enterprise
Linux
Market
overview
RHEL 2
CentOS
SLES
Ubuntu LTS Market overview
Overview
The End
Enterprise Linux Toshaan Bharvani 6 / 13

7. Enterprise
Linux Which distributions are Enterprise Linux
Toshaan
Bharvani
Defining
Enterprise
Linux
Enterprise Linux
Market Red Hat Enterprise Linux (RHEL)
overview CentOS
RHEL
SuSE Linux Enterprise Server (SLES)
CentOS
SLES
Ubuntu LTS
Ubuntu LTS (Debian)
Overview
Not Enterprise Linux
The End
Fedora
OpenSuSE
Gentoo
Slackware
(Debian)
...
Enterprise Linux Toshaan Bharvani 7 / 13

8. Enterprise
Linux RedHat Enterprise Linux
Toshaan
Bharvani
Defining
Enterprise
Linux
Market By RedHat : paid support
overview
RHEL Been around since 2002
CentOS
Maintenance Support : 7 years
SLES
Ubuntu LTS Hardware Support : 4 years
Overview
Update frequency : 6 months
The End
Release frequency : 2 years
Supported versions : 4 versions
Architecture Support : i386, x86 64, ia64, ppc, s390
Enterprise Linux Toshaan Bharvani 8 / 13

9. Enterprise
Linux CentOS
Toshaan
Bharvani
Defining
Enterprise
Linux
Market
CentOS community : free
overview
RHEL
Started in 2004
CentOS Maintenance Support : 7 years
SLES
Ubuntu LTS Hardware Support : 4 years
Overview
Update frequency : 6 months
The End
Release frequency : 2 years
Supported versions : 4 versions
Architecture Support : i386, x86 64, (ia64, ppc, s390)
Enterprise Linux Toshaan Bharvani 9 / 13

10. Enterprise
Linux SuSE Linux Enterprise Server
Toshaan
Bharvani
Defining
Enterprise
Linux
Market Novell : paid support
overview
RHEL Started in 2004
CentOS
Maintenance Support : 5+2 years
SLES
Ubuntu LTS Hardware Support : 3 years
Overview
Update frequency : 1 year
The End
Release frequency : 2 years
Supported versions : 2 versions
Architecture Support : i386, x86 64, ia64, ppc, s390
Enterprise Linux Toshaan Bharvani 10 / 13

11. Enterprise
Linux Ubuntu LTS
Toshaan
Bharvani
Defining
Enterprise
Linux
Market
Canonical : paid support
overview
RHEL
Started in 2006
CentOS Maintenance Support : 5 years
SLES
Ubuntu LTS Hardware Support : on demand
Overview
Update frequency : ongoing
The End
Release frequency : 18 months
Supported versions : 2 versions
Architecture Support : i386, x86 64, ia64, ppc, s390
Enterprise Linux Toshaan Bharvani 11 / 13

12. Enterprise
Linux Enterprise Linux overview
Toshaan
Bharvani
Defining
Enterprise
Linux RHEL CentOS SLES Ubuntu LTS
Market Maintenance Sup- 7 years 7 years 5 years 5 years
overview port
RHEL
Hardware Support 4 years 4 years 3 years on demand
CentOS
SLES Update frequency 6 months 6 months 1 year ??? ongoing
Ubuntu LTS
Release frequency 2 years 2 years 2 years 18 months
Overview
Supported versions 4 versions 4 versions 2 versions 2 versions
The End
Architecture i386, x86 64, i386, x86 64, i386, x86 64, i386, x86 64
Support ia64, ppc, s390 (ia64, ppc, s390) ia64, ppc, s390
Price / server / year $349 - $2499 free $349 - $1499 $750 - $2750
Install base 2.5 million 6 million 400 000 users 40 000 users
users users
Enterprise Linux Toshaan Bharvani 12 / 13

13. Enterprise
Linux The End
Toshaan
Bharvani
Defining
Enterprise
Linux
Market
overview
RHEL
CentOS
SLES
Ubuntu LTS
Overview
The End
Toshaan Bharvani <toshaan@vantosh.com>
http://www.toshaan.be/publications
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