Discuss May 2011

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225 participants
153 discussions

Drive recovery?
by Ashley M. Kirchner 11 May '11

11 May '11

I have a CentOS 5.6 system (recently installed) that, for some reason, has decided to mangle one of its drives, specifically /dev/hde1 ... No errors anywhere, just rebooted the machine over the weekend and it's gone. Up till the reboot, the drive was fine, I was writing to it without a problem. fdisk tells me: ---------- # fdisk -l /dev/hde Disk /dev/hde: 160.0 GB, 160041885696 bytes 240 heads, 63 sectors/track, 20673 cylinders Units = cylinders of 15120 * 512 = 7741440 bytes Device Boot Start End Blocks Id System /dev/hde1 * 1 20673 156287848+ 83 Linux ---------- There are no hardware errors in the boot log (dmesg). The only error is that it can't find the ext3 fs that was on that drive. Unfortunately, it's not a drive I can simply reformat and call it a day. There's data on it I need. When I try to mount it, I get: hfs: unable to find HFS+ superblock. Obviously that's not right as the drive was formatted as an ext3. So if I force it, I get this: ---------- mount -t ext3 /dev/hde1 /mnt/hde1 mount: wrong fs type, bad option, bad superblock on /dev/hde1, missing codepage or other error In some cases useful info is found in syslog - try dmesg | tail or so ---------- So, is this just an indication that the partition table is hosed? Is there anything, any tool, any way of reading the data off of this drive and put it elsewhere?

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ipv6 to ipv4 tunnel private replies requested
by David Mehler 11 May '11

11 May '11

Hello, Is anyone using an ipv6 to ipv4 tunnel? I've got one through Hurricane Electric <http://www.tunnelbroker.net> and am having an extremely difficult time getting it to work. If anyone has this going i'd appreciate hearing from you offlist and please have Ubuntu experience if possible. Thanks. Dave.

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Changing default paper size to A4 on CentOS 5 (Kyocera FS1920 printer)
by Mathieu Baudier 10 May '11

10 May '11

Hello, I have a Kyocera FS1920 network printer, and I run an up-to-date CentOS 5.6 x86_64 workstation. When I try to print with evince or Firefox the default paper size is always set to US Letter whereas the printer use A4. I have searched and other people seem to have the problem, but the only recommendations that I have found boil down to setting the default paper size to A4 in the CUPS printer settings. I had done that already and double-checked via the Printer config UI or the CUPS web interface (http://localhost:631), but to no avail. What is a bit weird is that I do not remember having such problems with my previous printer (an Epson Stylus RX500). I would be grateful for any hint / idea. Cheers, Mathieu

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Re: [CentOS] Changing default paper size to A4 on CentOS 5 (Kyocera FS1920 printer)
by m.roth＠5-cent.us 10 May '11

10 May '11

Nicolas Thierry-Mieg wrote: > Mathieu Baudier wrote: >> Hello, >> >> I have a Kyocera FS1920 network printer, and I run an up-to-date CentOS 5.6 x86_64 workstation. >> >> When I try to print with evince or Firefox the default paper size is always set to US Letter whereas the printer use A4. <snip> What are the printer's own settings? Have you checked using CUPS' interface? mark

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since CentOS 5.6 upgrade, squid crashes
by Laurent CREPET 10 May '11

10 May '11

Hi, I have recently upgraded our web proxy to CentOS 5.6. Before the upgrade, squid was running fine. Since the upgrade, sometimes, squid crashes: > [root@stargate ~]# service squid status > squid dead but pid file exists Looking at log files, I think it could be related to logrotate stuff, > -rw-r----- 1 squid squid 42713088 May 3 04:02 store.log > -rw-r----- 1 squid squid 8192 May 3 04:02 cache.log > -rw-r----- 1 squid squid 35778160 May 3 04:02 access.log I will look at the latest RPMs to check differences on /etc/logrotate.d/squid. Laurent. -- Laurent CREPET <lct(a)megrapet.fr>

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Am I being to paranoid?
by Jason 09 May '11

09 May '11

Hi All, I want to know thoughts on if I am being to paranoid/security conscious. CentOS 5.6, Apache, MySQL, running an Firewall in front of everything and obviously the built-in firewall on the box. I have ssh on a different port and starting to use Keys instead of password authentication. I host an intensive website and I am getting about 150 unique visitors per day. What I am seeing is LogWatch reporting a lot of 404's like: 404 Not Found //PHPMA/: 1 Time(s) //admin/myadmin/: 1 Time(s) //admin/phpmyadmin/: 1 Time(s) //adming/: 1 Time(s) //ascils/phpmyadmin/: 1 Time(s) //blog/wp-content/plugins/phpmyadmin/: 1 Time(s) //database/: 2 Time(s) //db/: 1 Time(s) //dba/: 1 Time(s) //dbadmin/: 2 Time(s) //html/phpMyAdmin/: 1 Time(s) //html/phpmyadmin/: 1 Time(s) //lamp/phpmyadmin/: 1 Time(s) //myadmin/: 1 Time(s) //mydatabase/: 1 Time(s) //mydb/: 1 Time(s) //myphp/: 1 Time(s) //mysql-admin/: 1 Time(s) //mysql/: 1 Time(s) //mysqladmin/: 2 Time(s) //mysqlmanager/: 1 Time(s) //phpMyAdmin-2.8.0.2/: 1 Time(s) //phpMyAdmin-2.8.1-rc1/: 1 Time(s) //phpMyAdmin-2.8.1/: 1 Time(s) //phpMyAdmin-2.8.2/: 1 Time(s) //phpMyAdmin/: 1 Time(s) //phpadm/: 2 Time(s) //phpma/: 1 Time(s) //phpmanager/: 1 Time(s) //phpmy/: 2 Time(s) //phpmyadmin/: 1 Time(s) //pma/: 1 Time(s) //pmaadmin/: 1 Time(s) //pmadmin/: 1 Time(s) //sql/: 1 Time(s) //sqladmin/: 2 Time(s) //sqldatabase/: 2 Time(s) //sqlmanager/: 1 Time(s) //sqlweb/: 1 Time(s) //typo3/phpmyadmin/: 1 Time(s) //webadmin/: 1 Time(s) //webdb/: 1 Time(s) //websql/: 1 Time(s) //wp-content/plugins/phpMyAdmin/: 1 Time(s) //wp-content/plugins/wp-phpmyadmin/: 1 Time(s) //xampp/phpmyadmin/: 1 Time(s) So I turned on Apache ReWrite and I created a file and I put in rules like: (just a small subset) RewriteCond %{REQUEST_URI} ^/php(.*) [NC,OR] RewriteCond %{REQUEST_URI} ^/phpmy(.*) [NC,OR] RewriteCond %{REQUEST_URI} ^/phpma [NC,OR] RewriteCond %{REQUEST_URI} ^/phpmyadmin [NC,OR] RewriteCond %{REQUEST_URI} ^/phpadmin [NC,OR] RewriteCond %{REQUEST_URI} ^/phpgadmin [NC,OR] RewriteCond %{REQUEST_URI} ^/phppgadmin [NC,OR] RewriteCond %{REQUEST_URI} ^/phpmyadmin(.*) [NC,OR] RewriteCond %{REQUEST_URI} ^/php\-my\-admin [NC,OR] RewriteCond %{REQUEST_URI} ^/php\-myadmin [NC,OR] RewriteCond %{REQUEST_URI} ^/phpmy\-admin [NC,OR] RewriteCond %{REQUEST_URI} ^/phpmanager [NC,OR] RewriteCond %{REQUEST_URI} ^/player(.*) [NC,OR] RewriteCond %{REQUEST_URI} ^/plugins [NC,OR] RewriteCond %{REQUEST_URI} ^/pma [NC,OR] RewriteCond %{REQUEST_URI} ^/p/m/a [NC,OR] RewriteCond %{REQUEST_URI} ^/pmadmin [NC,OR] RewriteCond %{REQUEST_URI} ^/pmaadmin [NC,OR] RewriteCond %{REQUEST_URI} ^/scripts [NC,OR] RewriteCond %{REQUEST_URI} ^/sd(.*) [NC,OR] RewriteCond %{REQUEST_URI} ^/sql [NC,OR] RewriteCond %{REQUEST_URI} ^/sqladmin [NC,OR] and if one of these is hit I use a Rule of: RewriteRule .* http://%{REMOTE_ADDR}%{REQUEST_URI} [L,R=301,QSA] Everyday I look at the LogWatch E-Mail and I add one people are trying to hit and restart apache. This yields a few questions. 1. Am I being to paranoid by doing this? My logic is they dont belong here and I could get mad if someone walked up to my apartment and tried jiggling the door handle to see if it was unlocked. 2. I know I can simplify these rules. Wouldn't RewriteCond %{REQUEST_URI} ^/php(.*) [NC,OR] get most of the attempts for thinks like /php, /php-myadmin, /phpmyadmin-2.0.8.8, etc? 3. Is there a better way to right these rules? 4. Why does LogWatch show this to me as a 404 , when a rewrite rule is hit and they are re-directed back to themselves? My rules seem to be working, if I try and hit /scripts right now, it does what I expect. Can anyone shed some light for me on my thoughts/questions? -- Jason

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hardware issues under 5.6
by mark 09 May '11

09 May '11

Folks, This is, umm, odd. Two, at least, and possibly a third over the weekend, of some older Dell 1950's, suddenly died shortly after being upgraded to 5.6. They're all about the same age, and it's not happening with other systems, but they claim a scsi abort, and the f/s goes read-only. The little lcd screen goes orange, and shows a fatal error E 171, and B0 F3 D0? D0 F3 B0? I forget, and won't be able to double check my memory till the morning. Has anyone seen this, with a f/s suddenly going r/o, on machines that seemed to be running fine for years? Since this is two? three machines, that's somewhere between "coincidence" and "enemy action". mark

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Building a Back Blaze style POD
by Jason 09 May '11

09 May '11

Hi All, I am about to embark on a project that deals with allowing information archival, over time and seeing change over time as well. I can explain it a lot better, but I would certainly talk your ear off. I really don't have a lot of money to throw at the initial concept, but I have some. This device will host all of the operations for the first few months until I can afford to build a duplicate device. I already had a few parts of the idea done and ready to get live. I am contemplating building a BackBlaze Style POD. The goal of the device is to start acting as a place to have the crawls store information, massage it, get it into db's and then notify the user the task is done so they can start looking at the results. For reference here are a few links: http://blog.backblaze.com/2009/09/01/petabytes-on-a-budget-how-to-build-che… and http://cleanenergy.harvard.edu/index.php?ira=Jabba&tipoContenido=sidebar&si… There is room for 45 drives in the case (technically a few more). 45 x 1tb 7200rpm drives is really cheap, about $60 each. 45 x 1.5tb 7200rpm drives are about $70 each. 45 x 2tb 7200rpm drives are about $120 each 45 x 3tb 7200rpm drives are about $180-$230 each (or more, some are almost $400) I have question before I commit to building one and I was hoping to get advice. 1. Can anyone recommend a mobo/processor setup that can hold lots of RAM? Like 24gb or 64gb or more? 2. Hardware RAID or Software RAID for this? 3. Would CentOS be a good choice? I have never used CentOS on a device so massive. Just ordinary servers, so to speak. I assume that it could handle so many drives, a large, expanding file system. 4. Someone recommended ZFS but I dont recall that being available on CentOS, but it is on FreeBSD which I have little experience with. 5. How would someone realistically back something like this up? Ultimately I know over time I need to distribute my architecture out and have a number of web-servers, balancing, etc but to get started I think this device with good backups might fit the bill. I can be way more detailed if it helps, I just didn't want to clutter with information that might not be relevant. -- Jason

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Typing "startx" gives me a black scrren, have to reboot to get back to runlevel 3
by Gilbert Sebenste 09 May '11

09 May '11

Hello everyone, I have been having a vexing problem for a year, and I cannot solve it. Hopefully, someone has a tip to get me over the hump to fix this once and for all. When I type "startx" from root, I get: (EE) fglrx(0): atiddxDriScreenInit failed, GPS not been initialized. (WW) fglrx(0): *********************************************** (WW) fglrx(0): * DRI initialization failed! * (WW) fglrx(0): * (maybe driver kernel module missing or bad) * (WW) fglrx(0): * 2D acceleraton available (MMIO) * (WW) fglrx(0): * no 3D acceleration available * (WW) fglrx(0): ********************************************* * (II) fglrx(0): FBADPhys: 0xf00000000 FBMappedSize: 0x10000000 (WW) fglrx(0): Failed to set up write-combining range (0xd0000000,0x10000000) I get a ton of stuff before this, but just info messages. Where should I start looking to fix this problem? I use the Redhat experimental kernels at http://epople.redhat.com/jwilson/el5/. Running CentOS 5.6, fully patched as of this morning with the gdb/OO updates. ******************************************************************************* Gilbert Sebenste ******** (My opinions only!) ****** Staff Meteorologist, Northern Illinois University **** E-mail: sebenste(a)weather.admin.niu.edu *** web: http://weather.admin.niu.edu ** *******************************************************************************

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HP MicroServer
by Timothy Murphy 09 May '11

09 May '11

A bit OT, but I'm running CentOS-5.6 on this machine (in fact on two of them) and it seems to run perfectly - I've had no problems at all. Except that I'd like to add a second ethernet port, and am not sure where one can find a card that will fit this machine. As far as I can see, it requires a half-height PCIe card, which seems to be rather a rare animal. (There doesn't seem to be a standard for the backplate.) So I'm wondering if anyone has tried this? Incidentally, is there a forum anywhere for users of the MicroServer under Linux? (The machine is unbelievably cheap at the moment, due to a bizarre cashback offer from HP.) -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland

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Discuss May 2011