Discuss April 2011

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312 participants
282 discussions

Auto-updates -- Bad Idea?
by email builder 07 Apr '11

07 Apr '11

Hello, As I've learned recently, I do not have any auto updates configured on my system. I see some posts on the web encouraging the use of "yum-cron", but I'd like to know what people feel about the use of automatic updates. That is, for a server (non-desktop) system, automatic updates could break things or have other unforeseen consequences, and that could happen at the worst of times, since the process runs regularly. On the other hand, for small businesses without highly trained sysadmins or ones with enough time to baby their servers, missing critical updates to, say openssl or some other mission-critical package could spell disaster. Is the only reasonable solution to schedule a "human cron" once a week to look at needed updates? Ouch. Thanks in advance for your considered opinions.

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How to set the hostname alias in DNS server
by sync 07 Apr '11

07 Apr '11

Hi ,all: There has a problem which confused me for a long time . The problem is the following: Would I can set the hostname alias in DNS server? That's to say, for example , if my hostname is called server, that it's ip address is 127.0.0.1 and I want to alias another name called aaa Gernerally, I can edit the /etc/hosts file to modify it, but the another computer did not recognise it. How could I do it ? Thanks in advanced ....

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Printers, aka an old time sysadmin
by m.roth＠5-cent.us 07 Apr '11

07 Apr '11

Well, today, I feel like a real, old time sysadmin. Now, I didn't have to write a driver in assembly for the printer, but.... We got this huge, 44" HP Designjet z3200ps printer. Only supports Win and Mac. Fine, I hang it off of one of our servers on a subnet (at $0.96/foot paper, we're the only ones who print on it....). Then I'm thinking that all I really need is a .ppd. My co-worker, who's also got a Mac, d/l's the Mac driver and extracts the .ppd. The Windoze one is apparently buried in a dll, you see.... I then figured out how to hack a .ppd. First, I found an ifdef construction, for Mac-only information. That worked on the small paper (24" width roll, "small"). Then the real paper, the 42" stuff. Why HP sells a 44" printer, but 42" paper, dunno, but.... there's no option for large format printing. After a pointless waste of half an hour on HP's "live chat" (not sure how many chats the guy was on), he tells me there's no driver. I call HP support, and talk to someone who seems to know a little more... but is sorta fuzzy on .ppd's, and then tells me that there ought to be an option to set a custom size, and seems to confirm what I read (in vi) in the ppd, that there are no settings for 42" paper. So I hacked it, and added settings for 42"x34", and 42"x60" (the usual size for posters). A lot was cut, paste, and substitute, but the one gotcha is that the actual paper size that the printer sees is in points. Once I got that, it worked beautifully. Anyone needs any info about hacking a .ppd, feel free to email me; if you have a beast of a z3200ps, I'll be glad to send you a copy of mine. mark

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Re: [CentOS] Centos 6 Update?
by Ian Murray 07 Apr '11

07 Apr '11

> > firstly, get a better email client. Your existing one is broken. Irrelevant, unhelpful and quite rude. Aside from that, if you tell me what you perceive to be the problem, perhaps stand a chance to fix the issue. If it is genuinely a client issue, then please give me something to send back to Yahoo. Assuming it wasn't just a very cheap and childish shot, of course. Obviously it wasn't so broken that you weren't able to read or reply my mail. I can't imagine what terrible hardship it has caused you. > > On 04/06/2011 12:55 PM, Ian Murray wrote: > >> Its easy to fixate on the idea of CentOS being the distro and the > distro > >> alone - however, a very large part of what the users see value in is > the > >> user base around CentOS - and focused, specialised help with those > areas > >> would go a long way in 'helping' CentOS. > > > > Would this help get a future release out of the door quicker? > > > > Sure. Okay, Thanks for clarifying that because it is the releases that appear be the problem at hand and the direct connections don't automatically leap out at me.

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FTP server for registered and anonymous users
by Fidel Dominguez-Valero 07 Apr '11

07 Apr '11

Friends I have a good ftp server working with authentication of users, but I want to put a folder with general information for everyone can read without having to log in, that is to be seen both registered users and guests too. -- Fidel Dominguez-Valero Linux User: 433411 Website: http://www.valerofix.ryanhost.net

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File-system Corruption
by James Bensley 07 Apr '11

07 Apr '11

Hi List, I suppose this isn't strictly CentOS but I'm talking about some 5.5 servers so I thought someone else here may have had the same issues; We power on servers at night via IPMI and shut them down the same way for automation. The problem I'm facing is that the servers are shutdown in about 2 seconds. IPMI provides remote access to the power features as we know so I don't think the OS has a chance to do a 'graceful' shutdown. One server in particular is told to shutdown at say 07:00am, the last scheduled task on there should finish around 06:30 so there is a half hour window for over run. It now has a corrupt XFS file system which I am repairing as we speak. I am wondering if this could be a possible cause of these problems? Perhaps if that last tasks over runs a couple of times and it gets powered off in the middle of the tasks? (These are backup servers rsyncing from other servers) Does anyone here have problems with this? -- James. http://www.jamesbensley.co.cc/ There are 10 kinds of people in the world; Those who understand Vigesimal, and J others...?

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CentOS 5.6 will not install due to Firefox error
by Gilbert Sebenste 06 Apr '11

06 Apr '11

Hello all, Well, my local mirror now has CentOS 5.6! Yay! But, I cannot get it to install. A "yum update" and a "yum --skip-broken" yields me this: --> Processing Conflict: firefox conflicts xulrunner >= 1.9.2.14 --> Finished Dependency Resolution firefox-3.6.13-2.el5.centos.i386 from installed has depsolving problems --> firefox conflicts with xulrunner Skip-broken could not solve problems Error: firefox conflicts with xulrunner You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest The program package-cleanup is found in the yum-utils package. Any ideas? All the packages seem to be there. ******************************************************************************* Gilbert Sebenste ******** (My opinions only!) ****** *******************************************************************************

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ZFS @ centOS
by Dawid Horacio Golebiewski 06 Apr '11

06 Apr '11

I have trouble finding definitive information about this. I am considering the use of SME 7.5.1 (centOS based) for my server needs, but I do want to use ZFS and I thus far I have only found information about the ZFS-Fuse implementation and unclear hints that there is another way. Phoronix reported that http://kqinfotech.com/ would release some form of ZFS for the kernel but I have found nothing. Can so. tell me if fuse-ZFS is more trouble than it's worth? Thanks in adv. Dawide

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Understanding yum automatic upgrades
by email builder 06 Apr '11

06 Apr '11

Hello, Sorry if this is somewhat naive, but I'm a little confused as to what the criteria is for that which will get upgraded automatically by yum and what will not. I see in our logwatch messages from time to time that yum upgraded a bunch of stuff, but I also notice that yum will not upgrade other packages at all (easy example is clamav, but there are others). Can someone explain or point me to where I can read about the distinction between what is and is not subjected to automatic upgrade? Thanks!

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Re: [CentOS] [OT: threading] WAS: Centos 6 Update?
by Trutwin, Joshua 06 Apr '11

06 Apr '11

> > >> firstly, get a better email client. Your existing one is broken. > > > Irrelevant, unhelpful and quite rude. > > > > mailing lists are setup to retain thread sanity, its expected people > > use mailclients that can honour that. If yours cant and you prefer not > > to change it- perhaps consider using the centos.org forums instead ? > > FWIW, on kmail on Fedora 14, at least, his messages show up properly > threaded, even though the In-Reply-To and References headers are missing > from his message. Don't know why Thunderbird doesn't show them > threaded. > > Of course, kmail has its own problems, particularly with putting in to many > References headers on occasion, but that's a different issue..... Some clients also thread by subject by default, I usually use claws mail for ML stuff as it's threading is excellent. Says the guy sending this email in Outhouse.... Josh

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Discuss April 2011