Karanbir Singh wrote:
We are pleased to announce the immediate availability of CentOS-5.1
for the i386 and x86_64 Architectures.
CentOS-5.1 is based on the upstream release 5.1, and includes packages
from all variants including Server and Client. All upstream
repositories have been combined into one, to make it easier for end
users to work with. And the option to further enable external
repositories at install time is now available in the installer.
Further Arch support for PowerPC, IA64 and Sparc are planned and will
be released soon. These arch's will follow the existing pattern of
release to Beta first, and then to Final.
This is the first release where we are also publishing a special
netinstall iso that can be used to start a remote install. Its
included in the isos/ directory. This iso is in addition to the
boot.iso published in the images/ directory of the distribution -
there are no changes to that file.
Verification of downloads and media
We highly recommend that all forms of downloads be verified before
use. Both md5sum and sha1sum for all isos and torrents released by the
CentOS project are published at the same location as the isos and
torrents themselves. md5sum and sha1sum verification tools are
available for all major platforms. As an added option, but not a
replacement to the md5sum/sha1sum process, its possible to check media
during install time.
All rpms published by the CentOS project are signed with a gpg key,
and by default we configure yum to verify this signature on package
download. In order to check that this is operating as normal ensure
that each repository section includes two lines that look exactly like
Note: 1) url to the gpg key will never point at an external non
2) a copy of the gpg key is also provided on the install media,
and installed as /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5, however do the
possibility of compromised media we recommend you still verify that
key with the one hosted on http://mirror.centos.org/
First a request from us : When possible, consider using torrents to
run the downloads. Not only does it help the community and keeps
mirrors from running up high bandiwdth bills, in most cases you will
find its also the fastest means to download the distro.
Via BitTorrent :
Torrents are available for i386 at
and for x86_64 at http://isoredirect.centos.org/centos/5/isos/x86_64/
Via direct download:
Due to bandwidth considerations the CentOS Project does not publish
ISOS directly from our network machines. However direct downloads are
available from external mirrors over http, ftp and rsync, and a geoip
based list is available at
http://isoredirect.centos.org/centos/5/isos/ to give you the best
predictable match ( and only lists mirrors that are updated already,
so you dont need to go looking for a mirror with all the isos you want
Some mirrors also publish DVD images that can be downloaded
directly. Refer to the mirrors list page at
http://www.centos.org/mirrors for more details Mirrors that offer
DVD's are clearly marked on the page.
i386 ISOS and their sha1sum's are :
x86_64 ISOS and their sha1sum's are :
The distro release notes are only available online at
http://wiki.centos.org/Manuals/ReleaseNotes/CentOS5.1/ The release
notes include important changelog info as well as notes about the
installer and outcomes from test situations which the centos-qa team
worked through. Its considered essential reading.
Upstream release notes are available in the NOTES/ directory of the
install media, as well as online at http://www.centos.org/docs/5/ .
These include release specific technologies, new features in the
distro and other misc infomation that can help you better utilise the
distro. Always something worth reading.
How to get help with CentOS
The best place to start when looking for help with CentOS is at the
wiki ( http://wiki.centos.org/GettingHelp ) which lists various
options and communities who might be able to help. If you think there
is a bug in the system, do report it at http://bugs.centos.org/ - but
keep in mind that the bugs system is *not* a support mechanism.
Friendly URL's :
And a big thanks to everyone who contributed to the distro, including
the translation teams, the qa team, the CentOS Developers and all the
users out there.
Congratulations CentOS Team! I'm waiting for my rsync mirror to finally
get 5.1 available and looking forward to the IA64 release when it
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