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Dovecot .99 Bug - LF not found where expected
by John Hinton 10 Jun '07

10 Jun '07

After about three years of this, it seems I have finally gotten somewhere near to the bottom of this. The symptom: Suddenly a user cannot download their email. Checking again through SquirrelMail, I get an error which says a log was written. Going to the logs I see "imap(username): Error indexing mbox file /var/mail/username: LF not found where expected" Using Webmin's read mail module, I can see the messages. So, I move them to another account, but this is not yet the end of it. I was at first having to delete the mbox and then I'd send a test message in to recreate the mbox. But today, I tried a different tack. I opened the now empty mbox in vi and found one blank line (LF). I deleted that line and then moved the mail back in and everything was fixed. So the line was still left behind. The next time this happens, I'm going to try to delete a LF from the top of the mbox file to see if it is fixed without moving the mail. I have read several places, although this is extremely difficult to track as there seems to be a multiple from address issue for some releases.. but anyway, I did finally find that dovecot .99 has an issue with leaving behind an extra linefeed at the beginning of the mbox. Deleting this linefeed fixes the problem. Supposedly dovecot 1 has fixed this problem. I have found many reports of problems on Fedora and RedHat. Also, Debian has a closed bug report regarding this issue as they have moved forward to dovecot-1.0 and it doesn't have this bug. The issue seems to not have any relation to the mailserver, as I saw both reports of problems on at least Sendmail and Postfix. Why are we still bugged with this? Seems that this is a bug that RedHat should be aware of? The problem is it only rarely happens. I have no idea how to repeat the issue. It always seems to be an Outlook user, although that is by far the most prevalent email client in use by our users and it might just be chance. So, what to do from here? Bug report to RedHat? This is most irritating! I can't even guess how many times I've fixed these mboxes. I'm about ready to toss dovecot in the trash until 1 becomes the RH standard unless there is a fix or upgrade from Redhat. Thanks, John Hinton

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tar question
by Tom Brown 10 Jun '07

10 Jun '07

Hi Using tar i normally create an archive etc and then unpack that archive, job done. But i am copying from one filesystem to another on the same host, they are 2 seperate nfs filesystems, and i wonder is it possible to use tar to do this as opposed to say rsync etc. tar -cvf /some/input/dir to/here etc ? thanks

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Standard RH iptables analysis
by Al Sparks 10 Jun '07

10 Jun '07

This is a standard RedHat / CentOS firewall configuration, where I told it, through the standard RH setup GUI, that I want ssh and snmp allowed through. Chain INPUT (policy ACCEPT) target prot opt source destination RH-Firewall-1-INPUT all -- anywhere anywhere Chain FORWARD (policy ACCEPT) target prot opt source destination RH-Firewall-1-INPUT all -- anywhere anywhere Chain OUTPUT (policy ACCEPT) target prot opt source destination Chain RH-Firewall-1-INPUT (2 references) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT icmp -- anywhere anywhere icmp any ACCEPT ipv6-crypt-- anywhere anywhere ACCEPT ipv6-auth-- anywhere anywhere ACCEPT udp -- anywhere 224.0.0.251 udp dpt:5353 ACCEPT udp -- anywhere anywhere udp dpt:ipp ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:snmp ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:ssh REJECT all -- anywhere anywhere reject-with icmp-host-prohibited The way I read this, though, the first rule in the RH-Firewall-1-INPUT chain applies to all packets coming in, which it accepts. That's all protocols from "anywhere" going to "anywhere". So shouldn't the packet no longer be evaluated past that rule? I know that when I have this enabled, it's stopping packets. So I'm reading this wrong. What am I getting wrong? === Al

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CentOS and Wordpress
by petevg＠gmail.com 10 Jun '07

10 Jun '07

Hi All, I am currently am responsible for maintaining a website built on Apache 2, running on some CentOS 4 (64 bit version) boxes. Thus far, the website has comprised a few HTML pages, and some dynamic pages generated by perl scripts. The CentOS install is pretty vanilla -- the only departure I've made from the default server install is to install awstats from the rpmforge repositories. This week, I tried to install Wordpress, and have run into a brick wall that several days of experimentation and deep consultation with Google have been unable to get me over. Here's the situation: I installed the mysql, mysql_server, and php packages, unpacked the Wordpress tarball into a "blog" directory, and make the necessary changes to wp-config.php. The MySQL database works just fine, and when I visit the blog directory, index.php runs and informs me that I need to surf over to install.php to complete the WordPress configuration, which is expected. But when I try to browse to install.php, Firefox gives me the option to save it, or run it locally -- it doesn't seem to want to run as a server side script, for some reason. I don't see any obvious issues with my php installation that would cause this -- /etc/httpd/conf.d/php.conf is in place, is loading module_php4, and has added a php application type to the apache setup. I did remember to restart the http daemon after installing php. I don't see any errors in the logs -- all I see in the apache logs is a GET request for install.php. The really confusing thing is that one php script -- index.php -- works just fine, while another php script -- install.php -- does not. Has anybody run into a similar problem with WordPress, or with php4 in general? It feels like I'm running afoul of some bit of overzealous security that's trying to stop php from doing Bad Things to the system, but, sans error messages, it's been difficult to figure out what bit of security might be responsible, and how I might go about coaxing CentOS into allowing me to run WordPress. And so I have come here to tap into the wisdom of the mailing list. Might anybody here have some hints as to what I might do to solve this puzzle? Thank you, -- ~PeteVG The truth does not change according to our ability to stomach it. ~ Flannery O'Connor

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procmail, and the care and feeding of mailing list content received
by R P Herrold 10 Jun '07

10 Jun '07

Some threads just go on too long. Personally I think a troll has hijacked the main centos list again and is inducing food fight behaviours while that troll perfectly 'innocently' asserting that it is just respoding to all email. see: http://video.google.com/videoplay?docid=-4216011961522818645 for a discussion of the problem of 'capture' in FOSS projects. But if one loses interest in a thread, it is easy enough to tune them out: 1. Install procmail; yum knows how 2. Add a mark and drop ruleset [herrold@new .procmail]$ cat ~/.procmail/killfilerc # # mark them :0fh ^ *List-Id:.*centos\.centos\.org ^ *Subject:.*CentOS Based Linux Firewall Document *!^X-brand | formail -A "X-brand: killfile " # and dump them :0 w * ^X-brand: killfile /dev/null 3. Integrate it in mailhandling; a fragment from: /home/herrold/.procmailrc # easy drops INCLUDERC=$HOME/.procmail/killfilerc ----------------------------------- easy enough to save 'caught' pieces to a file, rather than devnull until you are certain collateral damage has not been induced; see the procmail manpage series for a full discussion. -- Russ Herrold

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Redhat Cluster Manager?
by Dave Augustus 10 Jun '07

10 Jun '07

I just spend a few hours working with Redhat Cluster Manager. After working through some things that deal with Centos versus the *upstream provider*, I started configuring a cluster. Even to the point of using HP ILO as the fence. Anyone using this in production? With GFS ? I have used Heartbeat V1 in the past and I am deploying a new colo so I am looking at options. Any feedback is welcome. Thanks, Dave

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how to restart the USB driver
by Jerry Geis 09 Jun '07

09 Jun '07

How do I restart the USB driver on centos 5? I am getting a dump in /var/log/messages and I cannot mount the USB thumbdrive I plug in. It does not auto mount nor can I mount it. Thanks, Jerry

2 1

using a previous /home dir
by Shawn Brown 09 Jun '07

09 Jun '07

Hi, how can I use my previous /home partion under a new installation of cent0S5? Is it something like: mount it chown it (so the UIDs match) fstab it (suggestions here pelase) Was using fc6 that died in an update (I think XP under vm ware crashed) and segfaulted on reboot. Wanted to go to centOS anyway so... Um, the /home is a mirrored raid device across 2 disks. I can mount it fine. Sorry if this seems so simple to find it on google. I searched around and thought I'd ask before going further thinking maybe someone has a howto or would suggest a reinstall of centOS5 with it pointed to the /home directory I'd like to use. Wasn't sure how to do that without reformatting is though. I doubt this is relevant at this moment but the previous installation was i686 and the new on is x86_64 Thanks and happy to be finallying using centOS Shawn

2 1

Kernel Panic - possibly NFS related?
by Jesse Cantara 09 Jun '07

09 Jun '07

Hi Folks, This is my first post here, and unfortunately it's to ask for help in figuring out a kernel panic I am running into. The machine in question has run fine without problem for quite some time, running as a database/web server. It has an identical (hardware) twin that performs essentially the same functions, but which has not had any kernel panics. The only recent change I've made of note before the kernel panics started, is to set up an NFS share on both of those machines, each of which is mounted by three other machines. It seems like whenever there is any more than a negligible amount of activity over those NFS shares, that one machine gets a kernel panic. There are a relatively large number and size of files in each of the shares (70+ gigabytes, 10,000+ files), organized into directories so there aren't more than 100 or so files in any given directory. I'm not doing anything "weird" over the NFS either, just reading and writing zip files. I've never run into a kernel panic before (lucky?) and I can't find much information about analyzing the wreckage. I don't believe any log files are saved of the event. Otherwise, I would provide more information. The kernel I am using is: 2.6.18-8.1.4.el5 CentOS release 5 (Final) I don't have any unusual packages installed, just the default configuration, apache, mysql, and a few other trivial things. Thanks for any help you all can provide. If there is any glaring omissions of information, please excuse me, I'd be glad to help you all help me :) I just am not sure exactly what to provide. Thanks, -Jesse Cantara

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Glib and unknown user id with LDAP
by tblader 09 Jun '07

09 Jun '07

Hello All. Anyone know how to fix this[0]? I've got some Centos 4.5 boxes running as LDAP clients (user ids are not in /etc/passwd or/etc/shadow). If I make uid 230 local on the host, there is no error message. Adobe acrobat also does the same thing. The users are able to authenticate with LDAP on login, so at least part of the system knows where to look for user ids. Looking on google seems to suggest a glib bug, but I haven't run across a patch/fix for it yet. Anyone have one? Thanks [0] GLib-WARNING **: getpwuid_r(): failed due to unknown user id (230) GConf Error: Failed to contact configuration server; some possible causes are that you need to enable TCP/IP networking for ORBit, or you have stale NFS locks due to a system crash. See http://www.gnome.org/projects/gconf/ for information. (Details - 2: IOR file '/tmp/gconfd-somebody/lock/ior' not opened successfully, no gconfd located: No such file or directory) [1] passwd: files ldap shadow: files ldap group: files ldap

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