Re: [CentOS] rpc.idmamd warnings/errors
On Mon, Oct 28, 2013 at 11:57 AM, Marius Vaitiekunas mariusvaitieku...@gmail.com wrote: Hello, Every 15 minutes I get an error on NFSv4 server: rpc.idmapd[1889]: nss_getpwnam: name '0' does not map into domain 'aaa.test.home' I have fully updated Centos 6.4 machine. All shares seems to be ok. Does anybody know, what does this error mean? Google sends me to this bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=997164 -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] [CEntOS] - problem with iptables
On Thu, Oct 10, 2013 at 9:13 AM, Paolo De Michele pa...@paolodemichele.itwrote: sorry, but now if I modify /etc/sysconfig/iptables and I add two strings, per example: output omitted - -A INPUT -s ddns.no-ip.org -p icmp -j ACCEPT -A INPUT -j DROP -- output omitted and I do: service iptables save and restart my iptables firewall, output iptables -L is: -A INPUT -j DROP -A INPUT -s ddns.no-ip.org -p icmp -j ACCEPT why? When you do # service iptables save it over-writes /etc/sysconfig/iptables with the active set of iptables, so your changes are lost. One way to do what you want is to modify /etc/sysconfig/iptables, then do # service iptables restart This will reload the iptables from /etc/sysconfig/iptables -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to list openvpn clients?
On Tue, Oct 8, 2013 at 10:09 AM, Timothy Murphy gayle...@eircom.net wrote: I'm running an openvpn server on a CentOS machine - that is my excuse for posting my query here - and I'm wondering if there is some way of finding all the clients (not just those connected at this moment) who have been registered as clients of the openvpn server? All users should have a key in /etc/openvpn/easy-rsa/2.0/keys So that might be one source of usernames. Also look through /etc/openvpn/server.conf . There might be a line which verifies usernames, for example, from the OpenVPN 2 Cookbook: tls-verify /etc/openvpn/cookbook/example6-5-tls-verify.sh so you'd need to look at that file and example6-5-tls-verfiy.sh.allowed There are other possibilities that list all allowed users. See the Cookbook. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to list openvpn clients?
On Tue, Oct 8, 2013 at 10:48 AM, Timothy Murphy gayle...@eircom.net wrote: John Doe wrote: From: Timothy Murphy gayle...@eircom.net I'm running an openvpn server on a CentOS machine - that is my excuse for posting my query here - and I'm wondering if there is some way of finding all the clients (not just those connected at this moment) who have been registered as clients of the openvpn server? Did you configure ifconfig-pool-persist...? Thank you very much. I did actually set this in server.conf, and the list I am seeking is in fact in the place specified. This list will only include the usernames of those who have logged in as openvpn clients. There may be others who can log in but have not as yet. That's why I suggested looking at the keys. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Triple- or Quad-display single-card graphics solutions
On Tue, Aug 20, 2013 at 1:52 PM, Glenn Eychaner geycha...@mac.com wrote: So, after some discussion of our new control workstations, we are iterating in on a solution; we are looking at a 1U short-depth SuperMicro SuperServer 5017R-MF with a graphics card in the PCI-Ex16 expansion slot. However, the display requirements have increased to 3 or more monitors for future expansion, so I was wondering whether anyone had any experience with triple- or quad-display single card solutions. Thus far, I have found two promising solutions: NVidia NVS 510 or 450 I have an nVidia 510 in a Dell Optiplex 9010, small form factor computer using CentOS 6.4. It works well with the standard nouveau driver. I used to use Matrox M9140 cards, but that requires the Matrox proprietary driver which, at the time (April 2013), had not been updated to install on CentOS 6.4. Perhaps by now it has. However, I like the NVS 510 and I'll use them in the future. Is the NVS 450 card one or two GPUs? If two, you'll have two video cards and you'll probably have to stitch the monitors together with xinerama. Matrox M-series M9138 or M9148 Both these solutions claim to have Linux support, but I was wondering if anyone had any experience with them in CentOS 6.4? And if there were any other solutions I had overlooked? Thanks, -G. -- Glenn Eychaner (geycha...@lco.cl) Telescope Systems Programmer, Las Campanas Observatory As an amateur astronomer, I'm a little envious. However, I probably wouldn't do well at 2380 m altitude. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6 SFF motherboard or complete system
On Thu, Jun 27, 2013 at 11:32 AM, Glenn Eychaner geycha...@mac.com wrote: I am trying to assemble or purchase a set of CentOS 6 compatible SFF workstations, and am finding it incredibly frustrating to do so. hardware.redhat.com is so slow as to be useless and provides almost no information about each of the 1,300 or so products listed in their database; clicking through them one at a time is incredibly frustrating (and about half of them are discontinued or out of stock when I actually go looking for them, like the Intel DQ series motherboards I was interested in). Vendor web sites are almost no use; they trumpet their Windows 8 compatibility all over the site, but finding information about Linux compatibility is next to impossible. My requirements aren't overwhelming; an i7 processor, four memeory slots preferred, dual 24 (1920x1200) monitor capability, and dual ethernet (or an expansion slot for a second Ethernet card). Anyone have any advice on how to attack this these days? I've been out of the hardware-purchase game on the Linux side for years, and most of my bookmarks no longer point anywhere useful, sadly. I assume SFF is small form factor. If you're willing to buy from Dell, the Optiplex 9010 SFF has 4 memory slots, i7 capable, 2 expansion PCIe-16 (one wired x4) slots. You could use one for a dual monitor graphics card, and the other for extra ethernet ports. You'd need to get to someone in Dell enterprise support if you want to buy one without Windows, or you could just not use the Windows license. I'm curious though: why do you need dual ethernet for a workstation? Does your office have two lans? -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 4 monitors with one graphics card and standard driver
On Tue, Apr 16, 2013 at 12:52 PM, Dale Dellutri daledellu...@gmail.comwrote: I've just test an ATI FirePro 2460 graphics card on CentOS 6.4. It connects 4 monitors. It worked with the standard radeon driver. I was able to arrange the monitors into my preferred configuration (as a square array, 1 upper left, 2 lower left, 3 lower right, 4 upper right) simply by clicking System - Preferences - Display, and then moving the four monitor images. This creates the file ~/.config/monitors.xml . Moving windows among the monitors worked smoothly. I did not install the proprietary ATI driver; I don't need any of its features beyond what the standard driver provides. Some details: Dell Optiplex 9010, Small Form Factor (SFF) case requires SFF cards. CentOS 6.4 fully updated as of today. 2.6.32-358.2.1.el6.x86_64 kernel xorg-x11-drv-ati 6.99.99 1.el6 x86_64 BIOS shows the board in slot 1 (the blue connector) as VGA Compatible lspci shows 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Cedar [FirePro 2460] Kernel driver in use: radeon No xorg.conf was created or required. 4 Dell 2007FP monitors, each at 1600x1200 connected via DVI. I used to use Matrox M9140 cards, but that requires the Matrox proprietary driver which has not been updated for CentOS 6.4 as of today. I also tested two other cards: ATI FirePro 2450 and NVidia Quadro NVS 420. For each of these cards, the BIOS shows the card in slot 1 as a PCI Bridge. lspci reports two identical video cards at 03:00.0 and 04:00.0. Though it's easy to set up two screens properly, xinerama would probably be required in an xorg.conf to get all four screens working properly. As it turns out, the ATI FirePro 2460 works, but it's too slow with the standard radeon driver for our application. I tested an NVidia NVS 510 with both the standard nouveau driver, and the proprietary kmod-nvidia, nvidia-x11-drv rpms from elrepo. The two gave very similar quick response on our application, so we've decided to use the standard nouveau driver. Of all the cards I've tested, the 510 is the best. xorg-x11-drv-nouveau-1.0.1-3.el6.x86_64 lspci shows 01:00.0 VGA compatible controller: NVIDIA Corporation Device 0ffd (rev a1) The rest of the info is the same as shown above. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] 4 monitors with one graphics card and standard driver
On Tue, Apr 16, 2013 at 2:47 PM, m.r...@5-cent.us wrote: Dale Dellutri wrote: I've just test an ATI FirePro 2460 graphics card on CentOS 6.4. It connects 4 monitors. It worked with the standard radeon driver. I was able to arrange the monitors into my preferred configuration (as a square array, 1 upper left, 2 lower left, 3 lower right, 4 upper right) simply by clicking System - Preferences - Display, and then moving the four monitor images. This creates the file ~/.config/monitors.xml . snip I also tested two other cards: ATI FirePro 2450 and NVidia Quadro NVS 420. For each of these cards, the BIOS shows the card in slot 1 as a PCI Bridge. lspci reports two identical video cards at 03:00.0 and 04:00.0. Though it's easy to set up two screens properly, xinerama would probably be required in an xorg.conf to get all four screens working properly. Would you mind sending me your xorg.conf offlist? I *may* have found something in the one I've been handcrafting, but as my user is busy, I won't be able to try it out for a while, and would love to see what you did. As I said, when I used the ATI FirePro 2460, there was NO xorg.conf created or required. I would have needed one for the ATI 2450 or the NVidia NVS 420, but I never tried to create one. I'm still at the point of him having one monitor working fine, but the other comes up, not mirrored, but unreachable by keyboard or mouse. Looking at his old xorg.conf that worked with kmod-fglrx, and my own (an NVidia card) I realized they only have one Screen sectiuon, and a viewport on his (mine, of course, has twinview), so I've just edited his that way. I suggest that you restart the machine without X (in run level 3), then as root do: # X -configure which will write a new xorg.conf.new in the current directory. But are you sure the problem is in the xorg.conf? What does System - Preferences - Display show? -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to determine why a server is not responding
On Thu, Apr 11, 2013 at 10:36 AM, nan del bosc nandelb...@gmail.com wrote: Hi to all! We're using CentOS 5.5 64bits for our Plesk 11. This week we had the following problem 3 times... Suddenly, the server stops responding in all services (SSH, Apache, Postfix, ...) but ping works! After wait a few minutes (or 2 hours some times) the server continues unresponsive until we reboot. After reboot we search on /var/log/messages but cannot find useful information... ... What can we do? what can we test? Are you running sysstat / sar ? Perhaps the sa / sar database that's left after reboot can show if some resource was over capacity. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] How to determine why a server is not responding
On Thu, Apr 11, 2013 at 10:59 AM, nan del bosc nandelb...@gmail.com wrote: ... This is a Virtual Server from 1and1, I cannot access the BIOS... any other idea? If this is a virtual server, the actual hardware may just be running other virtual servers and you're not getting any resources. If that's true, nothing you do from your server will help you. You'll need to get system stats from the actual hardware provider. Sounds like the hardware is over-committed. Do you have some kind of service guarantee? -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] floppy drives
On Sun, Apr 7, 2013 at 2:45 PM, mark m.r...@5-cent.us wrote: Yes, really. I've got hundreds of the damn things here at home, and I want to go through them and get rid of them all. But... to do that I want to read them. I have both a 5.25 and a 3.5 drive, both are plugged in, but in the BIOS, all I see is the 3.5. Fine, I figure I'll take care of those. Nope. I see /dev/fd0 once I've booted up, but neither konqueror nor mount nor fdisk works - the latter telling me that /dev/fd0 is not a valid block device. After some googling, I tried modprobe floppy, which installed it, but still no joy. Anyone have a clue? To debug this, I'd do the following: 1. Remove both USB plugs (I assume that these floppies are USB connected) 2. Reboot 3. Plug just one in, then do lsusb and get the end of /var/log/messages One of these might tell you where the floppy is connected in /dev. It might not be /dev/fd0 4. If it doesn't show up immediately, try putting in a floppy disk and do 3 again. 5. If it doesn't show up again, then it's probably dead. 6. If it does show, perhaps at /dev/sdb1, then create a file .mtoolsrc: # USB drive drive u: file=/dev/sdb1 Then do mdir u: Of course, it will probably show up at /dev/fdn. Just my pre-tax 2 cents. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Does CentOS support dual graphics cards with 2 monitors each?
On Thu, Mar 28, 2013 at 5:08 PM, Alfred von Campe alf...@von-campe.comwrote: I have a user who wants to have 4 monitors attached to his CentOS 6.4 system. I know that you can't use both on-board video and a PCI video card at the same time, but what about two PCI video cards? The system seems to recognize them as shown by the lspci -v output below, but I can't get Xorg to use the second card. Has anyone done this? If so, what is the trick to get it to work? I previously suggested the Matrox M9140 with the matrox proprietary driver (m9x), but the current one does not support the Xorg server 1.13 which is the current server for CentOS 6.4. Until they update the driver package, it can't be installed on a CentOS 6.4 system. In the next few weeks I'm going to test some other graphic cards that have four monitor connections on one card: ATI FirePro 2460 Multiview NVidia Quadro NVS 420 NVidia Quadro NVS 510 I hope that they will work with the open source driver (radeon or nouveau). -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Does CentOS support dual graphics cards with 2 monitors each?
On Fri, Mar 29, 2013 at 9:07 AM, Alfred von Campe alf...@von-campe.comwrote: On Mar 28, 2013, at 23:01, Dale Dellutri wrote: What does xrandr report? Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 DVI-I-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 518mm x 3200mm 1920x1080 59.9*+ 1600x1200 60.0 1680x1050 60.0 1280x1024 75.0 60.0 1440x900 59.9 1280x960 60.0 1280x800 59.8 1152x864 75.0 1024x768 75.1 70.1 60.0 832x62474.6 800x60072.2 75.0 60.3 56.2 640x48072.8 75.0 66.7 60.0 720x40070.1 HDMI-1 disconnected (normal left inverted right x axis y axis) VGA-1 disconnected (normal left inverted right x axis y axis) (I've used Matrox M9140 and the matrox prop driver. That combo provides quad monitors with one graphics card.) That looks promising; I will have to check it out. Did you use this on Linux, and specifically CentOS? Yes. Four of these on older Fedora releases, and one on CentOS 6.3. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Does CentOS support dual graphics cards with 2 monitors each?
On Thu, Mar 28, 2013 at 5:08 PM, Alfred von Campe alf...@von-campe.com wrote: I have a user who wants to have 4 monitors attached to his CentOS 6.4 system. I know that you can't use both on-board video and a PCI video card at the same time, but what about two PCI video cards? The system seems to recognize them as shown by the lspci -v output below, but I can't get Xorg to use the second card. Has anyone done this? If so, what is the trick to get it to work? What does xrandr report? (I've used Matrox M9140 and the matrox prop driver. That combo provides quad monitors with one graphics card.) -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 6.3 - unsupported video hardware
On Wed, Mar 6, 2013 at 2:31 PM, Robert Moskowitz r...@htt-consult.com wrote: On 03/06/2013 02:51 PM, Craig White wrote: On Mar 6, 2013, at 12:24 PM, Robert Moskowitz wrote: I pulled one of my old OQO model 2 out of the junk bin and installed Centos 6.3 over Centos 5.3. The internal video does not work in graphics mode (text works fine), though a monitor attacked to the VGA port works fine. Although my intension is to use this as a portable test server, it would be nice if the video was available. How might I go about figuring out the Xorg magic to get it working? When you say internal video does not work, what do you mean? Is the laptop screen black, garbled, flickering, unresponsive? If black, did you try startx for the command line? Are there any errors (EE) or warnings (WW) in /var/log/Xorg.0.log? Anything in /var/log/messages or dmesg? What is the output of lspci | grep VGA? -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Centos 6.3 - unsupported video hardware
On Wed, Mar 6, 2013 at 3:03 PM, Robert Moskowitz r...@htt-consult.com wrote: On 03/06/2013 03:47 PM, Dale Dellutri wrote: On Wed, Mar 6, 2013 at 2:31 PM, Robert Moskowitz r...@htt-consult.com wrote: On 03/06/2013 02:51 PM, Craig White wrote: On Mar 6, 2013, at 12:24 PM, Robert Moskowitz wrote: I pulled one of my old OQO model 2 out of the junk bin and installed Centos 6.3 over Centos 5.3. The internal video does not work in graphics mode (text works fine), though a monitor attacked to the VGA port works fine. Although my intension is to use this as a portable test server, it would be nice if the video was available. How might I go about figuring out the Xorg magic to get it working? When you say internal video does not work, what do you mean? Is the laptop screen black, garbled, flickering, unresponsive? Scrolling flickering, blue and white image. If black, did you try startx for the command line? Have not switched to init 3 to try. Are there any errors (EE) or warnings (WW) in /var/log/Xorg.0.log? (EE) open /dev/fb0: No such device (WW) Falling back to old probe method for vesa (WW) Falling back to old probe method for fbdev (WW) CHROME(0): Manufacturer plainly copied main PCI IDs to subsystem/card IDs. (WW) CHROME(0): Unable to estimate virtual size (WW) CHROME(0): [XvMC] XvMC is not supported on this chipset (WW) Lid Switch: Don't know how to use device Anything in /var/log/messages or dmesg? what would I search for? Error messages pertaining to the video controller. What is the output of lspci | grep VGA? 01:00.0 VGA compatible controller: VIA Technologies, Inc. CX700/VX700 [S3 UniChrome Pro] (rev 03) Use the info in this line (VIA CX700 VX700 or UniChrome Pro) to do a google search. Add linux to the search terms to see what driver you need. Hope this points somewhere. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Off-Topic: Low Power Hardware
On Fri, Jan 11, 2013 at 8:55 AM, SilverTip257 silvertip...@gmail.com wrote: Hello, I'm slightly off-topic here, but it is somewhat CentOS related! I'm in search of some hardware that consumes a low amount of power for use as a test-bed for Linux, various coding projects, and LAN services. Google fanless pc or fanless computer. Fanless systems tend to be low power consumption, or low power systems tend to be manufactured by the same companies that make fanless. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6.3 as Firewall/Router
On Fri, Jan 4, 2013 at 11:01 AM, Tim Evans tkev...@tkevans.com wrote: I'm replacing an ancient Solaris 'ipf' firewall/router with a brand new CentOS 6.3 system. In the olden days, I successfully used the attached iptables script (as /etc/rc.local) on Red Hat 5.x systems, but this doesn't seem to be quite working on the new system. Specifically, while it seems to be routing ok, you cannot connect to anything on the inside net (e.g., with ssh or a browser) and cannot connect to the system with ssh or anything else from elsewhere on the inside net. Yet arp shows this system active. Is there obsolete stuff here, and/or anything missing that would cause this? You found the error, but I have a question about running this in rc.local. Aren't you opening a very short time security hole by running this from rc.local? Service network starts up early in the startup sequence (/etc/rc.d/rc3.d/S10network), and rc.local is at the very end. Wouldn't it be better to run the iptables rules once, then do: service iptables save This way, iptables rules would be in place (S08iptables) before netowrk startup. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] CentOS 6.3 as Firewall/Router
On Fri, Jan 4, 2013 at 3:04 PM, Tim Evans tkev...@tkevans.com wrote: On 01/04/2013 03:03 PM, Dale Dellutri wrote: On Fri, Jan 4, 2013 at 11:01 AM, Tim Evans tkev...@tkevans.com wrote: I'm replacing an ancient Solaris 'ipf' firewall/router with a brand new CentOS 6.3 system. In the olden days, I successfully used the attached iptables script (as /etc/rc.local) on Red Hat 5.x systems, but this doesn't seem to be quite working on the new system. Specifically, while it seems to be routing ok, you cannot connect to anything on the inside net (e.g., with ssh or a browser) and cannot connect to the system with ssh or anything else from elsewhere on the inside net. Yet arp shows this system active. Is there obsolete stuff here, and/or anything missing that would cause this? You found the error, but I have a question about running this in rc.local. Aren't you opening a very short time security hole by running this from rc.local? Service network starts up early in the startup sequence (/etc/rc.d/rc3.d/S10network), and rc.local is at the very end. Wouldn't it be better to run the iptables rules once, then do: service iptables save This way, iptables rules would be in place (S08iptables) before netowrk startup. Thanks, Dale. I'm trying to remember why I did it this way (nearly 10 years ago, when I did this first.) Seems it had to do with not turning on routing until the very end (instead of enabling it in /etc/sysctl.conf), relying on the out-of-the-box iptables rules in the interim (iptables still starts normally). This script overlays its rules, then turns on NAT and routing. Do the out-of-the-box iptables rules allow all entry to the system? What's in /etc/sysconfig/iptables ? I understand that the script does more than simply set iptables rules. However, you could set the rules you want, then just turn on NAT and routing in rc.local. I'm not trying to criticize, just curious. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Ethernet puzzle
On Fri, Dec 28, 2012 at 12:56 PM, Ashley M. Kirchner ash...@pcraft.com wrote: But it is. The MAC address on the motherboard port is NOT the same as the mystery device. And it DOES match one of the entries in udev's rules, and it's operational right now as eth0 (as it should be.) However, the mystery MAC address that's listed in udev's rules matches nothing in either lshw or lspci. Remember, udev's rules lists FOUR devices. There are only THREE. What does the BIOS say about ethernet devices? Does the motherboard have a management interface card with its own ethernet port, perhaps potential but not actually installed? Is there a fiber-optics connector on the system which is coming up as an ethernet port? Is one of the cards old enough to still have a separate BNC connector? On Fri, Dec 28, 2012 at 11:36 AM, Frank Cox thea...@melvilletheatre.comwrote: On Fri, 28 Dec 2012 11:21:22 -0700 Ashley M. Kirchner wrote: Yeah, rpmforge or repoforge. But, I'm looking for what exactly? It only lists a single ethernet port (the built-in one). That's what you're looking for. Now you know that the mysterious device isn't something that you didn't know aobout on the motherboard. -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com www.creekfm.com - FIFTY THOUSAND WATTS of POW WOW POWER! ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Basic KVM networking question
On Mon, Sep 10, 2012 at 11:34 AM, Steve Thompson s...@vgersoft.com wrote: A CentOS 6.3 box (host) runs several KVM virtual machines, each of which has two interfaces attached to the two bridges br1 and br2 (and each thus has two IP's; one on 192.168.0.0/22 and one on 192.168.4.0/22); net.ipv4.ip_forward on the host is 1. Simplified diagram: host +---+ | | net1 = 192.168.0.0/22 | | net2 = 192.168.4.0/22 ---+ br1 br2 +- | | || | | || Client A +---+Client B (hosts KVM1, KVM2, etc) Each client uses the bridge's IP address on the same side as default gateway. Client A can successfully ping or ssh (for example) to a KVM machine by IP address by using the KVM machine's net1 IP address. Client B can likewise communicate using the KVM machine's net2 IP address. However, neither client can communicate by using the address on the opposing segment (eg, Client A using KVM1_net2_IP); I can see from tcpdump that the packets are received by the virtual machine but no reply is ever made. Any clue? Routing problem? What are the response to each of the commands below on all five systems: host, Client A and B, KVM1 and 2: # ip addr show # ip route show -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Basic KVM networking question
On Mon, Sep 10, 2012 at 12:37 PM, Steve Thompson s...@vgersoft.com wrote: On Mon, 10 Sep 2012, Dale Dellutri wrote: Routing problem? Not that I can see, but here is the info (omitting interfaces that are not up). I included on one KVM since the problem is common to the others, and they are all set up the same way. On the host: 3: em2: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc mq state UP qlen 1000 link/ether 84:2b:2b:47:e8:7d brd ff:ff:ff:ff:ff:ff inet6 fe80::862b:2bff:fe47:e87d/64 scope link valid_lft forever preferred_lft forever 4: p1p1: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc mq state UP qlen 1000 link/ether 00:1b:21:6f:2b:4c brd ff:ff:ff:ff:ff:ff inet6 fe80::21b:21ff:fe6f:2b4c/64 scope link valid_lft forever preferred_lft forever 7: br1: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc noqueue state UNKNOWN link/ether 84:2b:2b:47:e8:7d brd ff:ff:ff:ff:ff:ff inet 192.168.4.2/22 brd 192.168.7.255 scope global br1 inet6 fe80::862b:2bff:fe47:e87d/64 scope link valid_lft forever preferred_lft forever 8: br2: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc noqueue state UNKNOWN link/ether 00:1b:21:6f:2b:4c brd ff:ff:ff:ff:ff:ff inet 192.168.0.2/22 brd 192.168.3.255 scope global br2 inet6 fe80::21b:21ff:fe6f:2b4c/64 scope link valid_lft forever preferred_lft forever 10: virbr0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc noqueue state UNKNOWN link/ether 52:54:00:9d:ad:f7 brd ff:ff:ff:ff:ff:ff inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 11: virbr0-nic: BROADCAST,MULTICAST mtu 1500 qdisc noop state DOWN qlen 500 link/ether 52:54:00:9d:ad:f7 brd ff:ff:ff:ff:ff:ff 12: vnet0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500 link/ether fe:54:00:13:73:28 brd ff:ff:ff:ff:ff:ff inet6 fe80::fc54:ff:fe13:7328/64 scope link valid_lft forever preferred_lft forever 13: vnet1: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500 link/ether fe:54:00:12:99:dd brd ff:ff:ff:ff:ff:ff inet6 fe80::fc54:ff:fe12:99dd/64 scope link valid_lft forever preferred_lft forever 14: vnet2: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UNKNOWN qlen 500 link/ether fe:54:00:72:f5:33 brd ff:ff:ff:ff:ff:ff inet6 fe80::fc54:ff:fe72:f533/64 scope link valid_lft forever preferred_lft forever 192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 192.168.4.0/22 dev br1 proto kernel scope link src 192.168.4.2 192.168.0.0/22 dev br2 proto kernel scope link src 192.168.0.2 default via 192.168.0.1 dev br2 On KVM1: 2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 52:54:00:13:73:28 brd ff:ff:ff:ff:ff:ff inet 192.168.3.253/22 brd 192.168.3.255 scope global eth0 inet6 fe80::5054:ff:fe13:7328/64 scope link valid_lft forever preferred_lft forever 3: eth1: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 52:54:00:12:99:dd brd ff:ff:ff:ff:ff:ff inet 192.168.7.253/22 brd 192.168.7.255 scope global eth1 inet6 fe80::5054:ff:fe12:99dd/64 scope link valid_lft forever preferred_lft forever 192.168.4.0/22 dev eth1 proto kernel scope link src 192.168.7.253 192.168.0.0/22 dev eth0 proto kernel scope link src 192.168.3.253 default via 192.168.0.1 dev eth0 On client A: 2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:14:22:27:9b:51 brd ff:ff:ff:ff:ff:ff inet 192.168.0.172/22 brd 192.168.3.255 scope global eth0 inet6 fe80::214:22ff:fe27:9b51/64 scope link valid_lft forever preferred_lft forever 192.168.0.0/22 dev eth0 proto kernel scope link src 192.168.0.172 default via 192.168.0.2 dev eth0 On client B: 2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:19:b9:c7:23:ad brd ff:ff:ff:ff:ff:ff inet 192.168.5.241/22 brd 192.168.7.255 scope global eth0 inet6 fe80::219:b9ff:fec7:23ad/64 scope link valid_lft forever preferred_lft forever 192.168.4.0/22 dev eth0 proto kernel scope link src 192.168.5.241 default via 192.168.4.1 dev eth0 This looks like it should work for Client A, but maybe not for Client B (see below). So maybe it's a firewall problem (iptables chain FORWARD) on the host? Client B's default route is 192.168.4.1. This address is not on the host. Did you mean to use .2? If not, is .1 aware of the routing to the 192.168.0.0/22 network? -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] System crash -- no clue why
On Tue, Jul 10, 2012 at 10:36 AM, Michael Eager ea...@eagerm.com wrote: Hi -- My CentOS 5.8 server crashed, leaving no clue why. The last entry in /var/log/messages is a dhcpd notice around 4:00am, followed by the restart message when I rebooted. The only clue that I have is that the fan was running full speed when I restarted it. The fan slowed to normal speed. Any ideas what I can do to find out the cause? Power failure? -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Failing Network card
On Wed, Jun 20, 2012 at 12:18 PM, Chris Beattie cbeat...@geninfo.com wrote: On 6/20/2012 9:34 AM, Gregory P. Ennis wrote: I have been chasing a problem with a pci-e TrendNet(TEG-ECTX) gigabit card. After adding the card to a machine with a new Centos 6.2 install and naming it 'eth4' it works well for 6 to 12 hours and then fails. Try moving the network card to a new slot, especially if you can swap the network card with another card which is known to work. Also, try swapping the card into a spare server. If the problem follows the network card, then the card is probably bad. If a known-good card misbehaves in the slot where you previously had the network card, then the slot may be bad as well. Or it could mean that the PCI-e slots are not providing enough power for this card, or the slots are specialized to run only certain types of cards. What motherboard does the OP have? -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] upgrade issue
On Fri, Apr 13, 2012 at 12:19 PM, Paul A ra...@meganet.net wrote: I have an old dell 2450 that was running kernel 2.6.18-308.1.1.el5 I then upgraded it via yum to 2.6.18-308.1.1.el5. Now when the server boots to the new kernel, 2.6.18-308.1.1.el5 it hangs on starting iSCSI and the weird thing is when I tried to switch back to the older 2.6.18-308.1.1.el5 kernel it works fine but the network script fails to start. I'm not really sure what I should do, if someone can give me an idea on what I need to do to fix the iSCSId issue on the new kernel or revert back to the old kernel and fix the network issue. The odd thing is both kernel load the e100 network driver but on the older kernel I can get the network script to start. I would appreciate some help. Do you need iscsi? If not, boot with the old kernel, and disable iscsi # chkconfig --list | grep iscsi (will probably show iscsi and iscsid) Then # chkconfig iscsi off # chkconfig iscsid off Then reboot with the new kernel. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] upgrade issue
On Fri, Apr 13, 2012 at 2:02 PM, Paul A ra...@meganet.net wrote: I'm running Raid with scsi disks so I'm assuming it's needed correct? iSCSI is for carrying SCSI command s and data over IP networks. I don't know how your RAID is set up, but it isn't normally done with iSCSI. See, for example: http://en.wikipedia.org/wiki/ISCSI versus http://en.wikipedia.org/wiki/RAID -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Dale Dellutri Sent: Friday, April 13, 2012 1:32 PM To: CentOS mailing list Subject: Re: [CentOS] upgrade issue On Fri, Apr 13, 2012 at 12:19 PM, Paul A ra...@meganet.net wrote: I have an old dell 2450 that was running kernel 2.6.18-308.1.1.el5 I then upgraded it via yum to 2.6.18-308.1.1.el5. Now when the server boots to the new kernel, 2.6.18-308.1.1.el5 it hangs on starting iSCSI and the weird thing is when I tried to switch back to the older 2.6.18-308.1.1.el5 kernel it works fine but the network script fails to start. I'm not really sure what I should do, if someone can give me an idea on what I need to do to fix the iSCSId issue on the new kernel or revert back to the old kernel and fix the network issue. The odd thing is both kernel load the e100 network driver but on the older kernel I can get the network script to start. I would appreciate some help. Do you need iscsi? If not, boot with the old kernel, and disable iscsi # chkconfig --list | grep iscsi (will probably show iscsi and iscsid) Then # chkconfig iscsi off # chkconfig iscsid off Then reboot with the new kernel. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] upgrade issue
On Fri, Apr 13, 2012 at 2:25 PM, Paul A ra...@meganet.net wrote: Dale, I disabled it and the server came up but im seeing all sorts of kernel errors when its disabled ( see below ). If this can't be fixed I would really like to boot the previous kernel however the network script won't start. Im not really sure how upgrading the kernel caused the network to stop working on the previous kernel. Nor do I know how upgrading could do that. What other changes have you made? Two questions: 1. Is the previous kernel (with iscsi and iscsid enabled) giving any error messages in the log when you attempt to boot it. 2. Is your RAID using local disks or disks on an iscsi target device? If local, iscsi shouldn't have anything to do with RAID. If on an iscsi target device, then you need iscsi and iscsid enabled. I'd suggest re-enabling iscsi and iscsid and try to solve the network problem with the old kernel. -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Dale Dellutri Sent: Friday, April 13, 2012 3:07 PM To: CentOS mailing list Subject: Re: [CentOS] upgrade issue On Fri, Apr 13, 2012 at 2:02 PM, Paul A ra...@meganet.net wrote: I'm running Raid with scsi disks so I'm assuming it's needed correct? iSCSI is for carrying SCSI command s and data over IP networks. I don't know how your RAID is set up, but it isn't normally done with iSCSI. See, for example: http://en.wikipedia.org/wiki/ISCSI versus http://en.wikipedia.org/wiki/RAID -Original Message- From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf Of Dale Dellutri Sent: Friday, April 13, 2012 1:32 PM To: CentOS mailing list Subject: Re: [CentOS] upgrade issue On Fri, Apr 13, 2012 at 12:19 PM, Paul A ra...@meganet.net wrote: I have an old dell 2450 that was running kernel 2.6.18-308.1.1.el5 I then upgraded it via yum to 2.6.18-308.1.1.el5. Now when the server boots to the new kernel, 2.6.18-308.1.1.el5 it hangs on starting iSCSI and the weird thing is when I tried to switch back to the older 2.6.18-308.1.1.el5 kernel it works fine but the network script fails to start. I'm not really sure what I should do, if someone can give me an idea on what I need to do to fix the iSCSId issue on the new kernel or revert back to the old kernel and fix the network issue. The odd thing is both kernel load the e100 network driver but on the older kernel I can get the network script to start. I would appreciate some help. Do you need iscsi? If not, boot with the old kernel, and disable iscsi # chkconfig --list | grep iscsi (will probably show iscsi and iscsid) Then # chkconfig iscsi off # chkconfig iscsid off Then reboot with the new kernel. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Where is source address info of a route kept?
I have an ethernet device in my lan with a primary address 192.168.5.205 and a secondary address .217. I added the secondary address after network startup established the primary address by an ip addr add command: # ip addr add 192.168.5.217/24 broadcast 192.168.5.255 dev eth0 # ip addr show ... 2: eth0: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 78:2b:cb:23:21:4c brd ff:ff:ff:ff:ff:ff inet 192.168.5.205/24 brd 192.168.5.255 scope global eth0 inet 192.168.5.217/24 brd 192.168.5.255 scope global secondary eth0 inet6 fe80::7a2b:cbff:fe23:214c/64 scope link valid_lft forever preferred_lft forever ... Then I add a new route via a network gateway but I want the route to use the secondary address as a source. # ip route add 11.11.11.11 via 192.168.5.148 src 192.168.5.217 And the ip route show command shows that it knows the source. # ip route show 11.11.11.11 via 192.168.5.148 dev eth0 src 192.168.5.217 But where is the source address kept? If I look at /proc/net/route, it shows the route (0B0B0B0B = 11.11.11.11), but not the source address. # cat /proc/net/route Iface Destination Gateway Flags RefCnt Use Metric Mask MTU Window IRTT eth0 0B0B0B0B9405A8C0 0007 0 0 0 0 0 0 ... Where is the source address kept? -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] pgadmin3 missing dependencies
On Tue, Nov 15, 2011 at 2:46 PM, Alan McKay alan.mc...@gmail.com wrote: I searched the list archives and I found one answer to this which suggested I should install the PG yum repos. I don't like that answer for reasons which follow. I'm running Centos 6.0 freshly installed, and I've decided that with this box I'm sticking as much as possible to just the CentOS repos that go with that release. I figure in particular I do not need any PG features above what are offered in release 8.4 that comes from the CentOS repos, so I don't really want to install PG repos. But first of all I do not even see pgadmin3 in the CentOS repos anywhere. Am I correct that in order to get this tool I need to get it from the PG repo? It seems odd to me that CentOS would not have it but stranger things have happened. So I pull down the pgadmin3 RPM manually, and try to do a manual install only to find that a number of RPMs are missing and required. I guess at this point I could just install the repo for PG to yum it all, but I'd like to know what RPMs are required and I am unable to figure that out. I figured out at least that I need libxslt, but cannot figure out from the below output what other RPMs are needed and where I get them. libxslt I got from 6.0 yum repos. [root@cc-bc4d99dffae2 ~]# rpm --install pgadmin3-1.12.2-1.rhel6.i686.rpm Instead of rpm, use yum install pgadmin3-1.12.2-1.rhel6.i686.rpm assuming the rpm is in the present working directory. Yum will note the dependencies and download them if they are available in your currently enabled repos. If not, you'll have to install and enable other repos. You might need: yum --nogpgcheck install pgadmin3-1.12.2-1.rhel6.i686.rpm warning: pgadmin3-1.12.2-1.rhel6.i686.rpm: Header V4 DSA/SHA1 Signature, key ID 442df0f8: NOKEY error: Failed dependencies: libwx_baseu-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_baseu-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_baseu-2.8.so.0(WXU_2.8.5) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_baseu_net-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_baseu_net-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_baseu_xml-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_baseu_xml-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_adv-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_adv-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_aui-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_aui-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_core-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_core-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_html-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_html-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_ogl-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_ogl-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_qa-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_richtext-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_stc-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_stc-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_xrc-2.8.so.0 is needed by pgadmin3-1.12.2-1.rhel6.i686 libwx_gtk2u_xrc-2.8.so.0(WXU_2.8) is needed by pgadmin3-1.12.2-1.rhel6.i686 wxGTK is needed by pgadmin3-1.12.2-1.rhel6.i686 [root@cc-bc4d99dffae2 ~]# -- “Don't eat anything you've ever seen advertised on TV” - Michael Pollan, author of In Defense of Food ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] pgadmin3 missing dependencies
On Tue, Nov 15, 2011 at 4:04 PM, John R Pierce pie...@hogranch.com wrote: On 11/15/11 1:12 PM, Alan McKay wrote: Thanks for the quick reponses guys - tried that and it still does not work which tells me I need those PG repos afterall, I guess. No biggie. My desired for a clean system has been smashed, but I'll live :-) did yum say what specific packages it needed ? I'm pretty sure you have to use 'yum localinstall' to install from an rpm file, and not just 'install'... from man yum: * localinstall rpmfile1 [rpmfile2] [...] (maintained for legacy reasons only - use install) and further: If the name is a file, then install works like localinstall. Actually, I've been using localinstall, but I started to use install a few months ago. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Which file system to use for a USB backup
On Wed, Mar 9, 2011 at 5:51 PM, Todd Cary t...@aristesoftware.com wrote: Les - A lot of the data needs to be moved in time to servers in other organizations (e.g. Rotary) or the data may be used as a repository for someone with just a notebook computer who would plug the HD into the computer. This is not my main data backup; I use rsync for that. http://www.toddcary.com/rotary/ is one example of data that needs to be shared. Can rsync take ext4 data and copy it to a fat32 drive? Yes, but you have to give up permissions and the modify time on a FAT32 is only accurate to 2 seconds. To rsync from an ext3/4 directory to a plugged-in USB drive use something like: rsync -av --no-p --modify-window=1 srcdir/ /media/volname/targetdir/ and you might need --delete. More info at man rsync. Another possibility: always use tar, and put something like a Windows version of 7zip executable on the USB drive as well as the data. That way, Windows users can get the files out the tar archive. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] using a Laptop as a KVM console?
On Wed, Oct 13, 2010 at 12:31 PM, Rudi Ahlers r...@softdux.com wrote: Hi all, Has anyone seen something like this before: I want to use a laptop as a KVM console. Basically when a technician goes to one of our datacentres, or clients he has to look for a free LCD, keyboard mouse to connect to a server (no network access, reinstall, troubleshoot failed kernel / HDD, etc). And then hopefully there's an open power socker in that cabinet. So I'm thinking why not just use a laptop instead? It already has an LCD, keyboard, mouse power. Surely someone has, or may still, build something that could connect to the laptop's USB port(s) and then to the server's VGA USB / PS2 ports, then act as a KVM? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 Your request inspired me to try a google search: linux laptop as kvm console Apparently there is such a device (URL may wrap): http://us.startech.com/product/NOTECONS01-Portable-USB-PS-2-KVM-Console-Adapter-for-Notebook-PCs It may require a Windows XP or Mac laptop, but at least one page says it works on Linux, too. You could try to contact StarTech, I guess. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] force b/w printing
On Tue, Aug 3, 2010 at 3:48 AM, Janez Kosmrlj postnali...@googlemail.comwrote: Has anyone an idea, how to force users to print b/w on a color printer. We are in the process to deploy color printers to some of our offices where they use centos 5.5 as their OS. They need the printers to print some advertisement material. But for everything else, they don't need it. And because of the costs of the color printing we would like to force them to use B/W where not explicitly necessary. Is there a way to force a printer driver to be just B/W even if it is a color printer. So i could install a second color printer which would only be available to a special print user. I assume that this is printer dependent. So I'd look at man lpoptions and try listing the various options available lpoption -p printer -l and look at storing the needed options in ~/.cups/lpoptions or /etc/cups/lpoptions For example, on my HP L7590 (color all-in-one): $ lpoptions -p home-printer -l PrintoutMode/Printout Mode: Draft Draft.Gray *Normal Normal.Gray High High.Gray PhotoBest PhotoHigh PhotoNormal InputSlot/Media Source: *Default PhotoTray Upper Lower CDDVDTray Envelope LargeCapacity Manual MPTray PageSize/Page Size: Custom.WIDTHxHEIGHT *Letter A4 Photo Photo5x7 PhotoTearOff 3x5 5x8 A5 A6 A6TearOff B5JIS CDDVD80 CDDVD120 Env10 EnvC5 EnvC6 EnvDL EnvISOB5 EnvMonarch Executive FLSA Hagaki Legal Oufuku w558h774 w612h935 Duplex/Double-Sided Printing: DuplexNoTumble DuplexTumble *None Quality/Resolution, Quality, Ink Type, Media Type: *FromPrintoutMode 300ColorCMYK 300DraftColorCMYK 300DraftGrayscaleCMYK 300FastDraftColorCMYK 300FastDraftGrayscaleCMYK 300GrayscaleCMYK 600ColorCMYK 600GrayscaleCMYK 600PhotoCMYK 600PhotoNormalCMYK 1200PhotoCMYK So I assume that setting option Normal.Gray instead of Normal (the defaullt) would give me gray-scale printing. YMMV, of course. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Unable to execute a script , Permission denied
On Tue, May 25, 2010 at 8:27 AM, Jatin Davey jasho...@cisco.com wrote:
On 5/25/2010 6:44 PM, Bowie Bailey wrote:
Jatin Davey wrote:
Here is the script that i am trying to execute as a non-root user:
#!/bin/sh
ps -C java -o thcount /home/proc_threads/tempfile
awk ' { total += $1 } END { print total } ' /home/proc_threads/tempfile
here is the output when i try to execute as a non-root user:
./javathreads: line 2: /home/proc_threads/tempfile: Permission denied
awk: cmd. line:1: fatal: cannot open file
`/home/proc_threads/tempfile' for reading (Permission denied)
The script is running, but the 'awk' line is failing to read
/home/proc_threads/tempfile. What are the permissions on that file and
directory?
$ ls -ld /home/proc_threads
$ ls -l /home/proc_threads/tempfile
Thanks all
I finally figured out that the tempfile that i was creating did not have
proper permissions for the script to write into. Now i have fixed it
using the chmod command and it is working fine.
If more than one other user executes this script at the same time,
tempfile may be overwritten by the second before the first can run
the awk line. Change this to use a pipe.
--
Dale Dellutri
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Re: [CentOS] [OT] Small touch screens that works with CentOS
On Fri, Mar 19, 2010 at 6:44 AM, Pascal Robert prob...@macti.ca wrote: Hi, We want to display on a small LCD screen next to our meeting rooms and optionally let people book the room from the panel. We looked at different providers and those solutions either works with Exchange or Lotus Notes... Since I already have code to fetch events from any CalDAV/WebDSV servers, I'm looking at building the system myself. So I'm wondering if any of you can recommend small LCD screen that works well with Linux (the app would be a full screen Web app, browser have to be Gecko or WebKit based), and even better if the screen can have « touch buttons » (so that people don't have to use a physical keyboard to book the room), that's even better. I guess my other option would be a iPad. The following page lists touchscreen laptops and add-on touchscreens: http://tuxmobil.org/touch_laptops.html including Magic Touch which claims Linux compatibility. And supposedly Freescale will soon ship its 7 touchscreen tablet. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Temperature sensor
On Fri, Feb 26, 2010 at 10:00 AM, Bowie Bailey bowie_bai...@buc.com wrote: Does anyone know of a cheap temperature sensor that will work with Linux? I don't need a fancy monitoring appliance, I just want a simple sensor that I can connect to one of my monitoring servers to let me know if the server room is getting hot. I;m not sure what you consider cheap. I've used a Sensatronics Model E4, for which I've written my own daemon software to take a reading and log it every x minutes. I've also had a Sensaphone Model 1104 which can automatically call multiple phone numbers and play a message about fault conditions. Each of these were in the $400 to $600 range (with sensors). -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] OpenSSH-5.3p1 selinux problem on CentOS-5.4.
On Wed, Feb 3, 2010 at 9:26 AM, James B. Byrne byrn...@harte-lyne.cawrote: On Wed, February 3, 2010 09:48, Ned Slider wrote: James B. Byrne wrote: Note: I am digest subscriber so if you could copy me directly on any reply to the list I would appreciate it very much. snip After a modest amount of research we decided that the best answer was to use a more recent version of OpenSSH (5.3p1)that supports chroot as a configurable option. I've not tested it, but I believe the chroot stuff was backported some while ago: Thank you very much for the information for I was not aware of this. Unfortunately, having tested the CentOS stock sshd server I discover that this back-port is very similar to that of the sftponly hack of several years ago. It is not the configurable chroot of OpenSSH-5.3. To begin with, it very much appears from the documentation as if this is an all or nothing setting; if it is on then all ssh users are chrooted. Further, to use this feature with interactive sessions one must copy all of the requisite system utilities into directories under the chroot directory. (For an interactive session this requires at least a shell, typically sh(1), and basic /dev nodes such as null(4), zero(4), stdin(4), stdout(4), stderr(4), arandom(4) and tty(4) devices.) This is not a viable alternative since the system is remotely managed. You mention two problems: 1. all or nothing setting 2. copy all of the requisite system utilities As for #1, you could run two separate SSH daemons (using different ports), so that only 1 has the chroot option. Here's a discussion about how to run two separate SSH daemons: http://www.DaleDellutri.com/prog.html As for #2, I don't understand how the fact that the system is remotely managed makes copying the files not a viable alternative. Do you not have root access to the server? (I'm not criticising, I simply don't understand.) So, I am left still seeking answers to my original questions. 1. Is it possible to mount the selinux filesystem twice on the same host having different roots? 2. If so, then how is this accomplished? 3. If not, then is there anything else that I can do, besides disabling selinux support in the sshd daemon, to get OpenSSH-5.3 chroot to work with SELinux? I am also interested in the answers to these questions. -- Dale Dellutri ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
