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34752 discussions

DVD-RAM writer software for CentOS4
by James B. Byrne 15 Aug '05

15 Aug '05

Firstly, let me thank all of the individuals who assisted me in various matters regarding find, tar and ssh last week. Your contributions were truly invaluable and I learned a great deal thereby. The reason for that brief flurry of activity was an administrative and technical move to store-to-disc from store-to-tape for our server backups. We presently use a mix of store to disc on various servers and store to tape depending upon the point of origin; store-to-disc for MS- Windows and Linux, store to tape for our HP3000 mid-range. These disparate backup strategies are now being marshalled onto a pair of Linux servers, one on-site and one at a remote location. At this juncture we are contemplating methods of creating off-line archives as well. In this regard I seek your advice regarding the suitability of employing an LG model GSA-4163B multi-format DVD drive as a backup device using DVD-RAM 120mm media. Specifically I wish to know what software is available under Centos4 to record to this drive and which of those are preferred for this sort of application and how suitable each is for untended backups. I understand that DVD ram has a ~4GB limit and that filesets in excess of that naturally require a disc change. We also are looking at tape systems. The idea is that we will end up with a four stage backup process. 1. Daily automated backups of each server over the network to a local high capacity linux server devoted to hosting the backup volumes. 2. Daily automated moving of certain critical, volatile backup sets from those on-line local stores via ssh to an off-site server performing the same function. 3. Daily semi- automated (somebody has to change the disc) stores of less critical and only somewhat volatile data onto DVD kept on-site in a fireproof vault. 4. Semi-automated archiving of the rest onto tape on a weekly basis and moving these off-site (the backup job is automatically scheduled but the media has to be manually handled). We currently use an internal DDS3 tape unit for store-to-tape and are considering changing to an external DLT drive. I would welcome comments regarding a suitable choice of external DLT tape drives for this application. We have used an external SCSI DLT device in the past but this device needs to be replaced and are open to alternatives. The total volume of data handled by all these these processes is not prohibitively large. We are speaking of tens of giga-bytes (~40GB) over all. Regards, Jim -- *** e-mail is NOT a secure channel *** James B. Byrne mailto:ByrneJB.<token>@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3CE delivery <token> = hal

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How can I make these command prompt settings into universal settings?
by Dave Gutteridge 15 Aug '05

15 Aug '05

I've got it so that I can enable Japanese input into an application by typing the following at a command prompt (with FireFox, for example): [dave@localhost ~]$ kinput2 -canna & [1] 10631 [dave@localhost ~]$ XMODIFIERS='@im=kinput2' LC_CTYPE=ja_JP.utf8 firefox However, I would rather not have to type in all that craziness each time I want to start an application. Further, instead of having to configure each application individually, it would be better to have this setting just on all the time for every application, both existing and new. I was under the impression this was possible. Following advice gained elswhere, I thought I could put the following into /etc/X11/Xresources: ! Japanese Input #!/bin/sh XMODIFIERS='@im=kinput2' LC_CTYPE=ja_JP.utf8 kinput2 -canna & But doing so results in Japanese input not being available for any application. I'm using KDE, and I learned that I should be able to put any shell script in the ~/.kde/Autostart/ directory and have it launch on start. So I put a file there called j-input.sh, changed it's permissions with chmod 755, and put the same commands that I had in Xresources. But still no result. Long story short: How do I get these command line settings to be permanently on: XMODIFIERS='@im=kinput2' LC_CTYPE=ja_JP.utf8 kinput2 -canna & Dave

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I've lost control of Gnome
by Dave Gutteridge 15 Aug '05

15 Aug '05

I tried out KDE for a while, but eventually found that it was not to my liking. I've switched back to Gnome, but it seems to me that options I used to have in the panel aren't available anymore. I'm not totally sure, but isn't there supposed to be some sort of Gnome (Nautilus?) control center? A place where I can adjust the themes, screen savers, and that sort of thing? I was sure it was there, and now I can't find it, and I'm lost about exactly which problem I should be fixing. Should there be a theme manager? If so where? I came across a theme switcher application, installed the RPM, and I can't find it in the applications menu either. Is Gnome upset with me for having been with KDE behind it's back? Dave

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Re: Firefox, Flash and Java on CentOS 4.1 x86-64
by karl＠streetlampsoftware.com 15 Aug '05

15 Aug '05

>On Wed, 2005-08-10 at 22:05 -0500, William A. Mahaffey III wrote: >> Karl S. Katzke wrote: >> >> > First of all, I just want to say *again* how happy I am with CentOS. >> > Across our boxes and our clients boxes, we're running it on more than >> > 20 machines at the moment and it's by far the most painless OS to >> > administer in detail that I've ever used. (Of course, I'm an old Slak >> > hat, but ...) Thanks so much to the community and the maintainers. >> > >> > We've recently run into a problem with a dual-opteron system that is >> > running LTSP and serving up X and Firefox to a whole bunch of diskless >> > clients. We're using the x86-64 build of CentOS, with the appropriate >> > Firefox package. The client users have all been asking for Flash, >> > since many websites are unusable without Flash these days ... but >> > there's no 64-bit build of the Flash plugin. (Thanks, Macromedia! You >> > suck!) >> > >> > What's the best way to provide Flash (and maybe Java?) with Firefox on >> > this server box? How big will the performance hit be from running >> > non-64 bit packages? Any specific tips & hints? >> > >> > Thanks! >> > >> > -Karl Katzke >> > _______________________________________________ >> >> >> >> You could run the 32-bit Firefox & 32-bit plugins, they are *supposed* >> to work seamlessly under the x86_64 OS. YMMV & all that. I have seen >> much talk about this on the SuSE AMD64 list, and this recommendation has >> floated out more than once. >> >Right ... the only option would be to remove the x86_64 firefox and >install the i386 one ... but that might require MANY other i386 >libraries. (I can't test it here). > >Tell them to get over it is another option :) > >Should not be a huge performance issue ... at least I haven't noticed >any earth shattering performance enhancements between the x86_64 and >i386 distros when installed on x86_64 machines (that one could feel via >the GUI screen). Unfortunately, telling them to get over it ain't anywhere near an option here. If it was my office ... well, I've worked without flash for aeons because I don't like it and I just don't visit sites that use it exclusively. But this client of mine is a sales company and needs to visit these sites. I guess we'll work on it over the weekend to see if we can solve the dependency nightmare and get it up and running. It's too bad we don't have another 64-bit system hanging around to test on. Thanks! -Karl Katzke

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expert guideance needed on arrays with CentOS 4 installed on dual processor compaq server
by Robert Hanson 14 Aug '05

14 Aug '05

greetings, as most know i have some older dual processor Compaq playtoys that i am deploying CentOS 4 on and doing some real world'ish simulation of failure and regular server environment testing. i have searched www on some things to no avail so off to the experts for some guideance please? case of: a dual Pentium 3 processor 1850R with a smart array 221 controller and quantity (4) 18 Gig SCSI hard drives in default specs RAID5 array created by the controller and Compaq Smartstart CD and i set the RAID rebuild to "highest priority"... Then, i do a custom install without Gnome or KDE of course. linux text lowres nousb nousbstorage skipddc install CentOS 4 using autopartition with a /boot 1024MB i.e. 1Gig / approx 50,000MB i.e. 50Gig everything installed perfect and i rpm --import /usr/share/doc/centos-release-4/RPM-GPG-KEY imported the key and do a full yum update to latest greatest CentOS 4 packages.... Now, i am trying to get some perspective and pointers so i can learn more how to better understand what i really have here. i know i have a lot to learn in regards to managing RAID5 on CentOS 4 Should I have autopartitioned? Is LVM the best way to manage RAID5 on CentOS? What other tools are there on a default CentOS 4 install to manage my array? What tools should i install with yum install to learn more and help me with this situation? If i shutdown the machine, and yank out any drive, and replace it with an identical drive and fire the unit back up, it asks me if i want to rebuild the data. Are these Compaq arrays "hot swap" like i think they are? How "long" does that usually take for it to rebuild by the controller? Hours? Days? Months? ;-> Remember, this is a (4) 18gig drive system. Should I allow the machine to be in production, online, up and running while it is rebuilding the 4th disk? Yes, I get the error from the kernel... non fatal error on ida/c0d0 ....while the machine appears to be rebuilding the 4th disk in the array... What other CentOS software tools should I be aware of to help me here? I really really appreciate your help and pointers and will go check out all of the documentation that you folks will point me to. Please remember, these boxes are not "in production" right now, so this is not an emergency, yet i am trying to simulate a production environment for obvious reaasons. Thank you in advance and kind regards, - rh -- Robert Hanson Abba Communications http://www.abbacomm.net

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SD Card Reader not being recognized
by Dave Gutteridge 14 Aug '05

14 Aug '05

I have a USB card reader that handles various card media, like SD cards, Sony Memory Sticks, and two other formats that I can't even remember what they are. I pretty much exclusively use it for SD cards. With Fedora, when I plugged the card reader into the USB port, and then inserted an SD card, it would automatically come up on the desk top. However, this is not the case with CentOS. Nothing comes up. Naturally, I searched Google for information, hoping that maybe it was just a matter of downloading an RPM or something. But I did not come across any information that helped. Is there a setting that I need to activate in order for CentOS to recognize SD Cards and/or the USB card reader? Dave

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quick question on RAID 1
by Ulrik S. Kofod 14 Aug '05

14 Aug '05

I have 3 disks that I want to setup in a raid 1, my questions is should I setup the 3rd disk as a spare-disk or should I mirror all 3 disks all the time? Will it perform *much* better to only mirror two and have the 3rd as a spare. Is it not safer to mirror all 3 drives all the time ?

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CentOS-4.1 Beta for Alpha arch
by Pasi Pirhonen 14 Aug '05

14 Aug '05

Hi, As usually, i haven't heard of anything about it. I can see that someone has downloaded it, but nothing more. I am now poking you once again to _say_ something about it. My vacation is coming near and the summer isn't afecting to temperature of my machine room so much anymore, so i intend to nail this to official release at time of CentOS-4.2 update release cycle. But i can't fix things i don't even know being broken. I do have things like compat-glibc now, but if there isn't going to be any feedback, i'll just package it with the fixes i do find necessary. Don't get this ranting wrong. I am just poking for info to make things better. -- Pasi Pirhonen - upi(a)iki.fi - http://iki.fi/upi/

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OT: Good flash mp3 player for linux
by Mark Belanger 13 Aug '05

13 Aug '05

Can anyone recommend an flash mp3 player with around a 1 gig of memory that will work easily with linux. I had a a RAVE-MP that I was fairly happy with .... until I stepped on it :(. TIA, -Mark

2 1

SSH hostname login
by Kai 13 Aug '05

13 Aug '05

I run CentOS 4.1 on a remote server and did a minimal installation. My problem is that I can not login using the HOSTNAME, must use the IP. 1. edited the - /etc/sysconfig/network 2. changed - HOSTNAME=a266 3. restarted the network Looks ok, hostname appears when logged on via IP, but can't use the HOSTNAME to log on from client. --- [kai@localhost ~]$ ssh a266 ssh: a266: Name or service not known --- [kai@localhost ~]$ ssh 192.168.0.101 kai(a)192.168.0.101's password: Last login: Sat Aug 13 17:13:09 2005 from 192.168.0.102 [kai@a266 ~]$ --- I can't figure out where I missed out. kai

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