centos-intro-1 1-en

8/14/2019 centos-intro-1 1-en

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CentOS:

Filling the community Enterprise gap

Dag Wiers

[email protected]


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Goals of this presentationGoals of this presentation

Define Enterprise Linux

What is CentOS ?

CentOS and Red Hat Enterprise Linux

CentOS and other Enterprise distributions

CentOS as a desktop replacement


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Enterprise Linux ??Enterprise Linux ??

Supported for extended period (years)

Security updates with little or no risk

Reliable and reproducable environment

(Paid for) support from the distributor (vendor)

Certified for software use, hardware and certainenvironments (eg. security, health, space)

incl: Red Hat Enterprise Linux, Ubuntu LTS, SuSELinux Enterprise Server and CentOS

excl: Fedora, Ubuntu, OpenSUSE, Gentoo


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So what is CentOS ?So what is CentOS ?

Community Enterprise OS

CentOS is a rebuild of Red Hat Enterprise

Linux sources RHEL is Open Source free as in speech

CentOS is affordable free as in beer

Community of volunteers rebuilds updates, testreleases and provide support


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CentOSCentOS andand RHELRHEL

Each release supported for 7 years (securityupdates)

Security updates with low or no risk

New enterprise release every 18 to 24 months

New bugfixes and features every 6 months(seldom new versions, usually backports)


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CentOS isCentOS is moremore than RHELthan RHEL

More simple to install, no installation numbers

Much larger community RHEL (more than 6million systems worldwide)

Mailinglists and Wiki is a big source of solutions

Additional packages of Open Source software

CentOS Extras and RPMforge

Extra functionality and flexibility (if needed)

eg. extended kernel-plus, hardware support


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CentOS isCentOS is lessless than RHELthan RHEL

No support from Red Hat and no access toRed Hat Network

Delayed security updates (2 to 24 hours) anddelayed releases (1 to 3 weeks)

Not certified, not the real deal

Bugs are not fixed in CentOS directly


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More than one CentOSMore than one CentOS

20022002 20042004 2008200820062006 20122012 2014201420102010

You are here

CentOS-2CentOS-2

CentOS-3.9CentOS-3.9

CentOS-4.6CentOS-4.6

CentOS-5.1CentOS-5.1full supportfull support

deploymentdeployment

maintenancemaintenance


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Positioning Enterprise LinuxPositioning Enterprise Linux

CentOS / RHEL SLES Ubuntu LTS

3 years 3 years undefined

7 years 5+2 years 5 years

Installation base

Release rate 18..24 months 24 months 24 months

Price/server/year $349..$1,500 Free/$750..$2,750

4 2 12.1, 3, 4 and 5 9 and 10 6.06 (soon 8.04)

Installationsupport

Maintenancesupport

+6 million (1/2007)

700.000 ? 1 million ?1.2 million (8/2007)

Free/$349..$2,500

Supportedversions

Source: https://www.redhat.com/security/updates/errata/

http://support.novell.com/lifecycle/

http://www.ubuntu.com/news/606released
https://www.redhat.com/security/updates/errata/http://support.novell.com/lifecycle/http://www.ubuntu.com/news/606releasedhttp://www.ubuntu.com/news/606releasedhttp://support.novell.com/lifecycle/https://www.redhat.com/security/updates/errata/


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Server features in CentOS-5.2Server features in CentOS-5.2

Server applications

Apache 2.2, PHP5, MySQL5

Virtualization features

Libvirt, Xen, KVM

Security features

SELinux


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Desktop features in CentOS-5.2Desktop features in CentOS-5.2

3D desktop environment

Gnome 2.16, compiz or beryl

Desktop applications

OpenOffice 2.3 (2.0.4), Firefox 3 (1.5), Thunderbird...

Evolution, Gimp, Pidgin

Additional desktop applications

Inkscape, Scribus, Pan

No bleeding edge software (so seldom latest)

No support for latest hardware (eg. new laptop)


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SummarySummary

Enterprise Linux should be the choice foreveryone (except very technical people ?)

CentOS is also for home-use or appliances

CentOS and RHEL is a symbiosis

Choose wisely when choosing Linux


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CentOS linksCentOS links

Website and download

http://www.centos.org/

http://mirror.centos.org/

Wiki, mailinglist and forums

http://wiki.centos.org/

http://lists.centos.org/

Instant messaging

#centos op irc.freenode.org
http://www.centos.org/http://wiki.centos.org/http://lists.centos.org/http://lists.centos.org/http://wiki.centos.org/http://www.centos.org/

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