Discuss July 2006

discuss@lists.centos.org

213 participants
260 discussions

Re: dell-lnx-pe] Re: RHEL4 vs CentOS-4
by R P Herrold 08 Jul '06

08 Jul '06

[newly cross-posted into the centos mailing list] On Thu, 6 Jul 2006, Stephen John Smoogen wrote: >> I understand that the following products [RHEL v the >> CentOS rebuilds] differ in price based on the extend of >> support. Apart from that, is there any other difference >> (i.e. performance, kernel stability etc)? CentOS is an outgrowth of early efforts of Lance Davis in the UK, and has been consciously shaped, structured and recruited by me and a couple of other admins at the end of the RHL series to tap 'the best and the brightest' of the pool of non-Red Hat RPM based distribution developers to build a professonal grade 'community' RPM based successor to RHL; some of us ran the cAos-1 high performance cluster oriented distribution creation to explore some packaging and buildsystem issues, and to build community, tools, and approaches. Once CentOS was viable, it spun off from being a cAos sub-project into the free-standing project it is now; in Enterprise Linux community rebuild space, it has essentially displaced WhiteBox (in part due to the loss of momentum which last years hurricane inflicted on New Orleans, and John Morris' fine effort), had a friendly merger in of David Parsley's Tao, and regularly has binary updates in place and more available than the upstream, due to a massive mirror pool, and a smart, geo-location aware update mirror dispatching system. > I don't think this is really on-topic for the Dell Poweredge list. dunno -- one is commercial and carries front end SLA's, a certification program, etc, some non-freely available source software, and costs; the other is community, organic and consciously without SLA's and the rest, and is not. Each runs just fine on Dell hardware (which I have been using on Dell PowerEdge kit for many, many years, in specing and delivering complex networks to customers) [btw, Matt, et al., thanks for the XPS series -- it makes a stable, sweet and scaldingly fast Linux lovin' desktop] > The differences between CentOS and RHEL are mainly in the > type and level of support you get from each. CentOS support > is whatever you get from IRC, mailing lists or what you > will pay a consultant to answer. The main CentOS IRC channel #centos on irc.freenode.net consciously tries to mix relentlessly On Topic, fast, technically accurate, work safe _teaching_ replies [based loosely on a Socratic method], with a bit of 'floorshow' -- I am one of the 'ringmasters' most weekday US business hours, and we have developed a cadre of 'regulars,' each of whom demonstrates advanced RHCE level expertise in addressing questions in real time from all comers. > The mailing lists and IRC will not spoon feed an answer and > will tell a person that they are an idiot directly versus > telling their bartender at the end of the shift. (smile) part of the floorshow design [the channel op's try to make the channel the one tab in the audience' IRC client left open and on top, so that less skilled admins will 'idle and "read the mail"' in it, to see what happens next, and also soak up both good BOFH skills and accurate RHCE type training ;) ]; a careful observer will note that Off Topic participants are pointed to other more appropriate venues for their inquiries, and cautioned several times before any 'festivities' occur. [I cc the centos list, as a way to publicly thank those participants] > For as much as I can tell, the base Centos is RHEL > recompiled with the same options etc. and the Red Hat > trademarks removed. If your organization does not need any > support then CentOS can be a good match. CentOS are very cautious to be 'very correct' as to respecting intellectual property rights in the rebuild. It is also correct that we expressly strive to match build environments, and use 'ldd' and other tools to verify as close as possible binary compatability to the upstream's binary offerings as we can [some recent packages have been built with non-released compiler variants at the upstream 'PNAELV', and so there are minor known divergences from time to time, which thus far have not affected performance]; we upstream issues, and proposed fixes from the CentOS Bug tracker into Red Hat's Bugzilla regularly, and some of the core are well known participants in the 'Fedora' project RH runs. 'performance, kernel stability' and the rest should be identical - if a deviation is suspected, I hope for and want to see a bug filed; we will track down a substantiated issue reported to our bug tracker; we maintain a reporting address, and respond to security inquiries confidentially and promptly; we have the expected mailing lists, website, wiki, forums, and the rest. Sometimes our art is criticized as not as flashy as some other distributions, but the distribution is not looking to win style shows ;) Commercial support is available from several of the core CentOS developers' companies, on an a la carte basis. - Russ Herrold

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Broken mirrors
by Alan Sparks 07 Jul '06

07 Jul '06

My repojanitor updates broke this morning due to problems at at least a couple of mirror sites: ftp://mirror.stanford.edu/pub/mirrors/centos/4/updates/x86_64/RPMS/ ftp://mirrors.kernel.org/centos/4/updates/x86_64/RPMS Appears the squirrelmail and openoffice updates there are some sort of symlink rather than plain files. Broke wget. -Alan =========== Alan Sparks, UNIX/Linux Systems Administrator <asparks(a)doublesparks.net>

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Upgrade 3.4 --> 3.7 went awry: rpmdb hosed
by Bart Schaefer 07 Jul '06

07 Jul '06

I installed CentOS 3.4 from a CD image I'd burned a while ago, and then attempted to update with yum to 3.7. All the packages installed OK, but at the very end of final cleanup I got an error message from db4 saying to "RUN RECOVERY". I did "rpm --rebuilddb" which may have been the wrong thing -- it issued an error about "pages missing". I then ran it again, and it came back with no errors, but after rebooting (for the kernel update) "rpm -qa" lists only a dozen packages or so, of which "rpm" is not one, and "yum check-update" chokes, showing Null for $releasever and the empty string for $basearch. This was a brand-new system, so I'm thinking I'll just download the 3.7 ISOs and re-install, but on the off chance there's some other way to recover from this I thought I'd ask. There doesn't seem to be anything missing other than a large chunk of the RPM database itself.

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Clamav and Postfix
by Alex Palenschat 07 Jul '06

07 Jul '06

Hello all, I am trying to replace a RH 7.1 (ouch!) box that has been running postfix 1.x/clamav/SA/amavisd-new on which the amavis/PF/SA packages have not been updated because of the way they were built/configured. I would like to use CentOS to do this. Having followed the thread regarding perl versioning issues with the latest version of amavisd-new and CentOS Base I am thinking I should pursue another path. I would like to have a solution that follows the distro path as closely as possible (using code supplied by the distro if possible or at least something I can install from a reputable yum repo) and this perhaps comes before using the latest version of amavisd-new. That being said, I'd like to ask if there are others out there on the list using clamav and Postfix together on CentOS and if so, how are you doing it and what did you have to do in order to get it working? Thanks in advance, Alex Palenschat

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Centos 4.3: VPN recommend/ howto anyone?
by Karl R. Balsmeier 07 Jul '06

07 Jul '06

Hi, I'm just curious about setting up a new VPN here in the office part of our enterprise, as well as a second in our 75+ node data center co-location facility. Needing to stomp out the ****dows L2TP node here, just too many side-issues with config. I'd like it to run the same OS as all of our servers, e.g. Centos 4.3. Any recommedations on which software/server/client rpm's/targ.gz's to run? Any pointers at existing of wiki-able HOWTO's under Centos I can check out? As usual, if it's not been documented yet, i'd sincerely contribute what I can to the process of rendering a complete document for the future use of the community. -karlski

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Yum Update
by Gerald 06 Jul '06

06 Jul '06

Why is it when i do a "yum list all kernel*" I only get 4 packages returned from the centosplus repo when in fact there are many many more if I go look in the RPMS folder where it's pulling the packages from? I'm trying to install the basic unsupported kernel (smp) to get XFS support but it doesn't appear when i do a yum list nor can i seem to get it to install when i specify the rpm name itself. As if it isn't there when clearly it is..

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RE: [CentOS] Clamav and Postfix
by Alex Palenschat 06 Jul '06

06 Jul '06

> > That being said, I'd like to ask if there are others out > there on the > > list using clamav and Postfix together on CentOS and if so, how are > > you doing it and what did you have to do in order to get it working? > > i am using this exact combination - with SA also and i link them > together using amavisd-new So what version of amavisd-new are you using and did you get it from a YUM repo or did you download an RPM/install from source tarball? How do you keep it updated? Thanks for your quick response. Alex Palenschat

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cacti on centos
by Aleksandar Milivojevic 06 Jul '06

06 Jul '06

Hi all, I'm trying to get Cacti installed on my CentOS 4.3 x86_64 box. I've got all of required packages installed, and created database file, and followed all the instructions in install manual. However, when I get login screen and use admin for username/password, it simply redirects me straight back to login screen. Looking at user_log table, the authentication was successfull (and since it was updated, I know database stuff works OK). If I type username or password wrong, I get messages saying so. If I just use admin as username/password, I get normal login screen with no "wrong password" message. I'm kind of stuck. Googling around hasn't helped much either. Anybody else had same problem? Searching the list archive, I can see there are many folks outthere running Cacti on CentOS, so hopefully somebody could help me out. Some additional notes: One thing I had to do was to hardcode paths in include/config.php for $config["base_path"] and $config["library_path"]. The ereg_replace stuff was throwing "premature end of regular expression" errors. Could be related to the problem I have. I got same thing with Karan's and cacti.org SRPM files (0.8.6d and 0.8.6h, respectively). SELinux is in permissive mode on the box. Relevant RPMs (other than cacti): Cacti box: httpd-2.0.52-22.ent.centos4 php-mhash-4.3.9-3.12 php-imap-4.3.9-3.12 php-pgsql-4.3.9-3.12 php-devel-4.3.9-3.12 php-pear-4.3.9-3.12 php-gd-4.3.9-3.12 php-4.3.9-3.12 php-mcrypt-4.3.9-3.12 php-ldap-4.3.9-3.12 php-snmp-4.3.9-3.12 php-domxml-4.3.9-3.12 php-mysql-4.3.9-3.12 php-eaccelerator-4.3.9_0.9.3-4.2.el4.rf php-mcal-4.3.9-3.12 php-mbstring-4.3.9-3.12 rrdtool-1.0.50-3.el4.rf mysql-4.1.20-1.RHEL4.1 mysqlclient10-3.23.58-4.RHEL4.1 net-snmp-5.1.2-11.EL4.6 net-snmp-utils-5.1.2-11.EL4.6 MySQL box: MySQL-server-standard-5.0.22-0.rhel4 MySQL-shared-standard-5.0.22-0.rhel4 MySQL-devel-standard-5.0.22-0.rhel4 MySQL-client-standard-5.0.22-0.rhel4 Thanks, -- See Ya' later, alligator! http://www.8-P.ca/

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Could not get shadow information for NOUSER
by Scott Taylor 06 Jul '06

06 Jul '06

Hello all, I have a CentOS 4.2 server that gives me these error messages in my /var/log/secure file, I realise that these are SSH attacks, but where does the extra line "Could not get shadow information for NOUSER" come from? This doesn't make any sense. I have many servers running CentOS 4.2, but don't get this error message on any others. I hate junk in my logs. Is there any way to get rid of it? Invalid user guest from ::ffff:210.210.4.60 error: Could not get shadow information for NOUSER Failed password for invalid user guest from ::ffff:210.210.4.60 port 55073 ssh2 Cheers. -- Scott

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Question about setting up a bridge
by carlopmart 06 Jul '06

06 Jul '06

Hi all, Where I can find docs about config a bridge interface under CentOS 4.3?? I can not find anything on Redhat and CentOS sites about this. many thanks -- CL Martinez carlopmart {at} gmail {d0t} com

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Discuss July 2006