Re: [CentOS] smartd and smartctl
FWIW, on some of my workstations, when I have gotten the sector pending messages, I have been able to take the drive out and run the manufacturer's diagnostics on it (in my case, Seatools), and that fixed some things and I haven't had any issues since. --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanh...@wright.edu http://www.engineering.wright.edu/~mvanhorn/ On 2/17/12 3:25 PM, m.r...@5-cent.us m.r...@5-cent.us wrote: Mike Burger wrote: A few weeks ago, one of my servers started complaining, via smartd, that one drive had one unreadable sector. I umounted it, and ran an fsck -c, then remounted it. Error didn't go away. Now, what's really annoying is that I've gotten back to it today, and it's reporting the problem, as it has for weeks now, every half an hour. However, when I run smartctl -q errorsonly -H -l selftest -l error /dev/sdb it gives me *nothing*. Anyone understand why I get two different results? mark and I am waiting for the smartctl -t long /dev/sdb to complete The smart system works at the hardware level, reading diagnostic information from the SMART circuitry on the hard drives, themselves. The hard drives will often, now, try to move the data from bad sectors on the platters to good sectors, and then mark them so that they won't be used, later. Running fsck only works at the logical filesystem layer. The fsck tool has no hooks to deal with the physical layer. Ok, but my thinking was, first, that after the fsck, the system wouldn't try to write to the bad sector, thus not provoking smart. The more annoying thing is that I don't understand why smartctl doesn't give the same info as smartd. When I do a -a, it does tell me that one sector's pending, but not that there's any error. mark ___ 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
[CentOS] iscsid still starting up after turning it off
I have a set of CentOS 5.7 workstations, on which I have turned of iscsid using 'chkconfig iscid off'. However, when some of them reboot, iscsid starts anyway. Also, when I do an 'service --status-all, iscsid is listed twice (this is true on both the workstations where iscsid starts and the ones where iscsid doesn't start), which seems to indicate, I think, that it is listed as a service twice. How can I tell from whence iscsid is starting, even after it's been turned off? Thanks! --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanh...@wright.edu http://www.engineering.wright.edu/~mvanhorn/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] restricting access to an NIS netgroup
On 11/8/11 4:31 PM, Stephen Harris li...@spuddy.org wrote: On Tue, Nov 08, 2011 at 03:41:22PM -0500, Mike VanHorn wrote: How can I restrict access to a system based on NIS netgroups? Change nsswitch.conf so that it reads passwd: compat passwd_compat: nis And then in /etc/passwd +@netgroup1:: +@netgroup2:: That way only users in the given netgroup(s) have visible accounts on the machine. This works. Thanks! --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanh...@wright.edu http://www.engineering.wright.edu/~mvanhorn/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] restricting access to an NIS netgroup
You'll probably need to add a pam_access.so reference to the stock /etc/pam.d/password-auth. Make the first account line account required pam_access.so My CentOS system doesn't have a stock password-auth file. I tried creating one with that line in it, but that didn't work. Also, per some web pages I found, I tried putting that line into system-auth, but that didn't work either. Also, I assume that your system can access your netgroups properly, i.e., getent can see them: getent netgroup $groupname Yes, that is working. Fortunately, the solution provided on-list by Stephen Harris did work, but I'm puzzled as to why this isn't. --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanh...@wright.edu http://www.engineering.wright.edu/~mvanhorn/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] restricting access to an NIS netgroup
I am using CentOS 5.7. I have an /etc/security/access.conf file which has the following: + : root : LOCAL + : @mynetgroup : ALL - : ALL : ALL I thought this is supposed to restrict access to the system to only root and the accounts in the mynetgroup netgroup; however, anyone NIS account is still able to login. It appears that the access.conf is being ignored completely, so I'm thinking there's something I'm missing. How can I restrict access to a system based on NIS netgroups? Thanks! --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanh...@wright.edu http://www.engineering.wright.edu/~mvanhorn/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] updating 5.6 but not going to 6.0
I'm confused as to how to install updates for CentOS 5.6 without upgrading to 6.0. When I do a yum check-updates, the new *-release packages for 6.0 are listed, so I don't think I want to do a simply yum update. Is there a way to update 5.6 without going to 6.0? --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanh...@wright.edu http://www.engineering.wright.edu/~mvanhorn/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Insert the second CD of an install
Using CentOS 5.5 x86_64. I am trying to install software that comes on two discs. I can start the install just fine, but when it comes to taking out the first disc and putting in the second, the system won't let me eject it. I remember reading something on the internet once about something needing to be enabled to allow this to work, but I can't find it now. Does anybody have a clue as to what I might be looking for? (Yes, the work around is to just mount both ISOs and not use real discs at all, but as administrator I understand that process and my users won't. However, they are familiar with the process of inserting disks.) Thanks! --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanh...@wright.edu RSS: http://www.engineering.wright.edu/~mvanhorn/MikeVanHorn'sNewsFeed.xml http://www.engineering.wright.edu/~mvanhorn/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Insert the second CD of an install
On 2/15/11 4:09 PM, John R Pierce pie...@hogranch.com wrote: On 02/15/11 1:03 PM, Mike VanHorn wrote: Using CentOS 5.5 x86_64. I am trying to install software that comes on two discs. I can start the install just fine, but when it comes to taking out the first disc and putting in the second, the system won't let me eject it. you typically have to umount the volume before you can eject the disk. and of course to umount it, noone can have any open files on it. Exactly. That's why I can't remember what it was I read about, because I've never known anything to work any way other than the way you've described it above. --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanh...@wright.edu RSS: http://www.engineering.wright.edu/~mvanhorn/MikeVanHorn'sNewsFeed.xml http://www.engineering.wright.edu/~mvanhorn/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] how many people still use NIS?
On 10/1/10 2:27 PM, Boris Epstein borepst...@gmail.com wrote: Hello listmates, I have discovered a very strange SFTP problem which I can not connect to anything but NIS thus far. See here: http://www.linuxquestions.org/questions/linux-server-73/sftp-seems-to-fail-for -nis-accounts-under-openssh-5-x-816020/ http://readlist.com/lists/suse.com/suse-linux-e/38/193419.html Hence the question: is NIS (YP) still in use much anywhere for authentication? We use it for our mixed environment of Solaris and Linux (including CentOS) workstations. 100-150 machines, 600-700 users. --- Mike VanHorn Senior Computer Systems Administrator College of Engineering and Computer Science Wright State University 265 Russ Engineering Center 937-775-5157 michael.vanh...@wright.edu RSS: http://www.engineering.wright.edu/~mvanhorn/MikeVanHorn'sNewsFeed.xml http://www.engineering.wright.edu/~mvanhorn/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
