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• award phoenix bios not recognizing my sata hdd.

  - by josh

  What am I doing wrong? I have a custom built comp with a Fatal1ty AA8XE mobo. It has 4 SATA ports and one IDE port. When i first got it, I had a really hard time putting in more than one hard drive. Right now i have one 120gb IDE HDD on master and my DVD+-RW on slave connected to the one IDE spot on the mobo. I ripped a bunch of movies and filled up my HDD, so I got a WD 80gb SATA drive. I plugged it into SATA1 and hooked up the power, turned on comp, went into bios. The only thing in any option in any of the menues in this crazy lookin bios is a thing that says "SATA mode". i put it on IDE, set it so PATA is primary, SATA is secondary. booted up my comp, nothin. Not recognizing the SATA. I went back into the bios and checked it all again. I saw that it says SATA2 and SATA4 are the secondaries so i put it on SATA2, booted, nothing, same with SATA4, same with SATA3, all same as SATA1. Bios and wt os are not recognizing the drive as being there at all. I even downloaded and printed the almost 100 page manual for the mobo, read the entire thing, and still can't figure it out. I know there are a lot of people out there smarter than me when it comes to computers. So please, somebody, anybody, please tell me something that I'm not seeing. Some setting somewhere that I didn't configure right. There is something, obviously, but I can't find it. As far as i can tell, everything is set perfectly fine for my 120gb to be the master and the SATA to be the slave. I don't know what I'm doing wrong but I'm seriously about to throw this computer out the window. thankyou in advance to whoever attempts to help.

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• Howo to get Multipath IO with Dell MD3600i into active/active setup?

  - by Disco

  I'm desperately trying to improve performance of my SAN connection. Here's what i have: [root@xnode1 dell]# multipath -ll mpath1 (36d4ae520009bd7cc0000030e4fe8230b) dm-2 DELL,MD36xxi [size=5.5T][features=3 queue_if_no_path pg_init_retries 50][hwhandler=1 rdac][rw] \_ round-robin 0 [prio=200][active] \_ 18:0:0:0 sdb 8:16 [active][ready] \_ 19:0:0:0 sdd 8:48 [active][ghost] \_ 20:0:0:0 sdf 8:80 [active][ghost] \_ 21:0:0:0 sdh 8:112 [active][ready] And multipath.conf : defaults { udev_dir /dev polling_interval 5 prio_callout none rr_min_io 100 max_fds 8192 user_friendly_names yes path_grouping_policy multibus default_features "1 fail_if_no_path" } blacklist { device { vendor "*" product "Universal Xport" } } devices { device { vendor "DELL" product "MD36xxi" path_checker rdac path_selector "round-robin 0" hardware_handler "1 rdac" failback immediate features "2 pg_init_retries 50" no_path_retry 30 rr_min_io 100 prio_callout "/sbin/mpath_prio_rdac /dev/%n" } } And sessions. [root@xnode1 dell]# iscsiadm -m session tcp: [13] 10.0.51.220:3260,1 iqn.1984-05.com.dell:powervault.md3600i.6d4ae520009bd7cc000000004fd7507c tcp: [14] 10.0.50.221:3260,2 iqn.1984-05.com.dell:powervault.md3600i.6d4ae520009bd7cc000000004fd7507c tcp: [15] 10.0.51.221:3260,2 iqn.1984-05.com.dell:powervault.md3600i.6d4ae520009bd7cc000000004fd7507c tcp: [16] 10.0.50.220:3260,1 iqn.1984-05.com.dell:powervault.md3600i.6d4ae520009bd7cc000000004fd7507c I'm getting very poor read performance : dd if=/dev/mapper/mpath1 of=/dev/null bs=1M count=1000 The SAN is configured as follows: CTRL0,PORT0 : 10.0.50.220 CTRL0,PORT1 : 10.0.50.221 CTRL1,PORT0 : 10.0.51.220 CTRL1,PORT1 : 10.0.51.221 And on the host : IF0 : 10.0.50.1 IF1 : 10.0.51.1 (Dual 10GbE Ethernet Card Intel DA2) It's connected to a 10gbE switch dedicated for SAN traffic. My questions being; why the connection is set up as 'ghost' and not 'ready' like an active/active configuration ?

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• iSCSI, failover and XenServer

  - by jemmille

  I have an iSCSI fail over implementation setup so if one of my storage units fails the other takes over immediately (it also runs the NFS shares). When fail over occurs, volumes are exported, the IP is switched to the other machine and the targets are reconfigured. The fail over of the storage system itself works just fine. I use NexentaStor for my filer. When I do a test (manual) fail over of my storage the following occurs: Note: I run the admin VM's on NFS and customer based VM's on iSCSI All NFS based VM's remain up and working perfectly through the failover and after All VM 's running on iSCSI eventually report the following: An error about not being able to write to a particular block An error about journaling not working Then the file system goes RO To get the VM's working again I have to do the following: Force shutdown of the "broken" VM's. Detach the iSCSI SR Re-attach the iSCSI SR Boot the VM on a different server (5 in my pool) If I don't boot on a different server I get this error "Internal error: Failure("The VDI <uuid&gt; is already attached in RW mode; it can't be attached in RO mode!")" The only way I have found to fix that error is to reboot the entire server it was running on previously which is obviously a huge pain. Currently multipathing is NOT enabled (but can be and the same thing still occurs). I have edited much of the /etc/iscsid.conf file to work with the timeout settings but to no avail. In short, my storage fails over properly but XenServer does not keep the connection alive. As a thought, the error that shows up in #4 above might be the ultimate cause and fixing that would fix everything? Any help would be appreciated more than you know.

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• Do I need liquid cooling?

  - by Mrrvomun

  I'm building a computer mainly for gaming and developing games. It's going to be a three screen system with two GeForce GTX 460's and a quad-core i7. The newegg wattage calculator says I need around 900W. The case I intend to get is this one. Full specs if you need 'em are at the end of this post. I have no intentions to overclock the system at the moment, but this may change in the future. I've done a lot of research on the subject, and the answers I've found indicate that it takes a heck of a lot of power to require liquid cooling, and most non-overclocked systems don't need it. But I haven't seen a question about a system with two GPU's, so I ask you the following two questions: Assuming that the system is used for gaming for very extended periods of time (say 4-6 hours at a time, nonstop) with all three screens running at full 1080p, would the fans installed in the system suffice? Or would I need more fans and/or liquid cooling? If the system is used under the same circumstances as above, and is overclocked to a reasonable level, would the fans installed in the system suffice? Or would I need more fans and/or liquid cooling? Specs: Intel Core i7 16GB DDR3 Two nVIDIA GeForce GTX 460 3TB HDD Two DVD-RW writers Thermaltake 1050W power supply Case is linked above

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• Resize Debian in VirtualBox

  - by Poni

  I have a VM with one HD of size 3GB and I'd like to enlarge its HD to 7GB. So I execute this command on the host (while guest is shutdown): VBoxManage modifyhd debian.vdi --resize 7168 Then I run the guest, Debian 6, and then: smith@debian6:~$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 2.8G 2.6G 60M 98% / tmpfs 61M 0 61M 0% /lib/init/rw udev 57M 160K 57M 1% /dev tmpfs 61M 0 61M 0% /dev/shm smith@debian6:~$ sudo parted /dev/sda print Model: ATA VBOX HARDDISK (scsi) Disk /dev/sda: 3221MB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 3035MB 3034MB primary ext3 boot 2 3036MB 3220MB 185MB extended 5 3036MB 3220MB 185MB logical linux-swap(v1) smith@debian6:~$ cat /proc/partitions major minor #blocks name 8 0 3145728 sda 8 1 2962432 sda1 8 2 1 sda2 8 5 180224 sda5 So, no automatic resizing (detection) of the HD/partition (while VirtualBox, in the host, shows it's 7GB now). Ok... Then I do: smith@debian6:~$ sudo resize2fs /dev/sda1 resize2fs 1.41.12 (17-May-2010) The filesystem is already 740608 blocks long. Nothing to do! smith@debian6:~$ sudo parted GNU Parted 2.3 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sda1 Using /dev/sda1 (parted) resize WARNING: you are attempting to use parted to operate on (resize) a file system. parted's file system manipulation code is not as robust as what you'll find in dedicated, file-system-specific packages like e2fsprogs. We recommend you use parted only to manipulate partition tables, whenever possible. Support for performing most operations on most types of file systems will be removed in an upcoming release. Partition number? 1 Start? 0 End? [3034MB]? Here I'm stuck. At the above parted it asks me to resize to 3GB. No point in that, right.. What should I do in order to enlarge this partition?

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• DRBD on a disk with existing file system that takes all the place

  - by Karolis T.

  I'm currently trying to simulate the environment via XEN. I have installed two debian systems with such FS layout: cltest1:/etc# df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda2 6.0G 417M 5.2G 8% / tmpfs 257M 0 257M 0% /lib/init/rw udev 10M 16K 10M 1% /dev tmpfs 257M 4.0K 257M 1% /dev/shm Host cltest2 is identical. Here's my drbd.conf global { minor-count 1; } resource mysql { protocol C; syncer { rate 10M; # 10 Megabytes } on cltest1 { device /dev/drbd0; disk /dev/xvda2; address 192.168.1.186:7789; meta-disk internal; } on cltest2 { device /dev/drbd0; disk /dev/xvda2; address 192.168.1.187:7789; meta-disk internal; } } I have not created filesystem on drbd0 Starting DRBD via init.d script errors out with: Starting DRBD resources: [ d(mysql) /dev/drbd0: Failure: (114) Lower device is already claimed. This usually means it is mounted. [mysql] cmd /sbin/drbdsetup /dev/drbd0 disk /dev/xvda2 /dev/xvda2 internal --set-defaults --create-device failed - continuing! Running: drbdadm create-md mysql gives: cltest1:/etc# drbdadm create-md mysql md_offset 6442446848 al_offset 6442414080 bm_offset 6442217472 Found ext3 filesystem which uses 6291456 kB current configuration leaves usable 6291228 kB Device size would be truncated, which would corrupt data and result in 'access beyond end of device' errors. You need to either * use external meta data (recommended) * shrink that filesystem first * zero out the device (destroy the filesystem) Operation refused. Command 'drbdmeta /dev/drbd0 v08 /dev/xvda2 internal create-md' terminated with exit code 40 drbdadm aborting As I understand, all of my problems are because I don't have unallocated disk space on xvda2. What are my options besides shrinking FS and connecting a separate physical disk? Can't the meta-data be stored on a file in the local filesystem?

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• configuring vsftpd anonymous upload. Creates files but freezes at 0 bytes

  - by Wayne

  vsftpd on ubuntu after sudo apt-get install vsftpd Then did configuration as in the attached /etc/vsftpd.conf file. Anonymous ftp allows cd to the upload directly and allows put myfile.txt which gets created on the server but then the client hangs and never proceeds. The file on the server remains at 0 bytes. Here's the folders and permissions: root@support:/home/ftp# ls -ld . drwxr-xr-x 3 root root 4096 Jun 22 00:00 . root@support:/home/ftp# ls -ld pub drwxr-xr-x 3 root root 4096 Jun 21 23:59 pub root@support:/home/ftp# ls -ld pub/upload drwxr-xr-x 2 ftp ftp 4096 Jun 22 00:06 pub/upload root@support:/home/ftp# Here's the vsftpd.conf file: root@support:/home/ftp# grep -v '#' /etc/vsftpd.conf listen=YES anonymous_enable=YES write_enable=YES anon_upload_enable=YES dirmessage_enable=YES xferlog_enable=YES anon_root=/home/ftp/pub/ connect_from_port_20=YES chown_uploads=YES chown_username=ftp nopriv_user=ftp secure_chroot_dir=/var/run/vsftpd pam_service_name=vsftpd rsa_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem rsa_private_key_file=/etc/ssl/private/ssl-cert-snakeoil.key Here's a file example that attempted to upload: root@support:/home/ftp/pub/upload# ls -l total 0 -rw------- 1 ftp nogroup 0 Jun 22 00:06 build.out This is the client attempting to upload...it is frozen at this point: $ ftp 173.203.89.78 Connected to 173.203.89.78. 220 (vsFTPd 2.0.6) User (173.203.89.78:(none)): ftp 331 Please specify the password. Password: 230 Login successful. ftp> put build.out 200 PORT command successful. Consider using PASV. 553 Could not create file. ftp> cd upload 250 Directory successfully changed. ftp> put build.out 200 PORT command successful. Consider using PASV. 150 Ok to send data.

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• configure apache/webdav readonly for user x, read/write for user y

  - by user82296

  I'm using Apache 2.2 on RHEL 6.x. I can get webdav setup as readonly for user x or readwrite for user x but can't figure out how to make it read only for user x and read/write for user y. I just have a single folder /var/www/html/davtest owned by apache:apache and I want myUser to have readonly access and myAdmin to have read/write access. So far I've only been able to control this by modifying the permissions on the dir /var/www/html/davtest (e.g. if apache has rw then no matter how I set limitExcept below either user can read/write Is this in general possible? <Directory /var/www/html/davtest > DAV on Options Indexes AuthType Digest AuthName myAuth AuthDigestDomain /myD/ http://mysys.x.y/davtest AuthDigestProvider file AuthUserFile /var/www/davDigest/dav_pw require user readOnlyUser <limitExcept get head options> require user myAdmin </limitExcept> </Directory> I've tried various permutations with Limit, LimitExcept and it appears that the only thing that determines who can read/write to the share are the permissions on the files/folders in the share. any guidance, pointers to docs would be greatly appreciated. thanks

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• General logging won't work in MySQL

  - by leonstr

  I saw on SF that there's an option in MySQL to log all queries. So, in my version (mysql-server-5.0.45-7.el5 on CentOS 5.2) this appears to be a case of enabling the 'log' option, so I edited /etc/my.cnf to add this: [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql old_passwords= log=/var/log/mysql-general.log [mysqld_safe] log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid I then created the file and set permissions: # touch /var/log/mysql-general.log # chown mysql. /var/log/mysql-general.log # ls -l /var/log/mysql-general.log -rw-r--r-- 1 mysql mysql 0 Jan 18 15:22 /var/log/mysql-general.log But when I start mysqld I get: 120118 15:24:18 mysqld started ^G/usr/libexec/mysqld: File '/var/log/mysql-general.log' not found (Errcode: 13) 120118 15:24:18 [ERROR] Could not use /var/log/mysql-general.log for logging (error 13). Turning logging off for the whole duration of the MySQL server process. To turn it on again: fix the cause, shutdown the MySQL server and restart it. 120118 15:24:18 InnoDB: Started; log sequence number 0 182917764 120118 15:24:18 [Note] /usr/libexec/mysqld: ready for connections. Can anyone suggest why this isn't working?

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• MySQL permission errors

  - by dotancohen

  It seems that on a Ubuntu 14.04 machine the user mysql cannot access anything. It is not writing logs nor reading files. Witness: - bruno():mysql$ cat /etc/passwd | grep mysql mysql:x:116:127:MySQL Server,,,:/nonexistent:/bin/false - bruno():mysql$ sudo mysql_install_db Installing MySQL system tables... 140818 18:16:50 [ERROR] Can't read from messagefile '/usr/share/mysql/english/errmsg.sys' 140818 18:16:50 [ERROR] Aborting 140818 18:16:50 [Note] Installation of system tables failed! Examine the logs in /var/lib/mysql for more information. ...boilerplate trimmed... - bruno():mysql$ ls -la /usr/share/mysql/english/errmsg.sys -rw-r--r-- 1 root root 59535 Jul 29 13:40 /usr/share/mysql/english/errmsg.sys - bruno():mysql$ wc -l /usr/share/mysql/english/errmsg.sys 16 /usr/share/mysql/english/errmsg.sys Here we have seen that mysql cannot read /usr/share/mysql/english/errmsg.sys even though the permissions are open to read it, and in fact the regular login user can read the file (with wc). Additionally, MySQL is not writing any logs: - bruno():mysql$ ls -la /var/log/mysql total 8 drwxr-s--- 2 mysql adm 4096 Aug 18 16:10 . drwxrwxr-x 18 root syslog 4096 Aug 18 16:10 .. What might cause this user to not be able to access anything? What can I do about it?

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• Zabbix Trigger for SELinux (type=AVC) Errors

  - by Kevin Soviero

  I would like to create a trigger in Zabbix to alert me anytime a type=AVC error appears in a CentOS 6 server's /var/log/audit/audit.log file. I've already tried creating a basic log scrape. E.g.: log[/var/log/audit/audit.log,type=AVC,"UTF-8",100] However, it does not work. I believe this is due to the /var/log/audit/audit.log and it's parent folder using the following permissions: drwxr-x---. 2 root root 4096 Apr 20 04:29 . drwxr-xr-x. 13 root root 4096 Apr 14 12:07 .. -rw-------. 1 root root 5948185 Apr 20 15:27 audit.log -r--------. 1 root root 6291566 Apr 20 04:29 audit.log.1 -r--------. 1 root root 6291704 Apr 19 16:56 audit.log.2 -r--------. 1 root root 6291499 Apr 19 05:22 audit.log.3 -r--------. 1 root root 6291552 Apr 18 17:48 audit.log.4 I would prefer not to change the permissions for security reasons. Has anyone done log monitoring of /var/log/audit/audit.log using Zabbix? And if so, how?

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• postgresql No space left on device

  - by pstanton

  Postgres is reporting that it is out of disk space while performing a rather large aggregation query: Caused by: org.postgresql.util.PSQLException: ERROR: could not write block 31840050 of temporary file: No space left on device at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:1592) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1327) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:192) at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:451) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:350) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeUpdate(AbstractJdbc2Statement.java:304) at org.hibernate.engine.query.NativeSQLQueryPlan.performExecuteUpdate(NativeSQLQueryPlan.java:189) ... 8 more However the disk has quite a lot of space: Filesystem Size Used Avail Use% Mounted on /dev/sda1 386G 123G 243G 34% / udev 5.9G 172K 5.9G 1% /dev none 5.9G 0 5.9G 0% /dev/shm none 5.9G 628K 5.9G 1% /var/run none 5.9G 0 5.9G 0% /var/lock none 5.9G 0 5.9G 0% /lib/init/rw The query is doing the following: INSERT INTO summary_table SELECT t.a, t.b, SUM(t.c) AS c, COUNT(t.*) AS count, t.d, t.e, DATE_TRUNC('month', t.start) AS month, tt.type AS type, FALSE, tt.duration FROM detail_table_1 t, detail_table_2 tt WHERE t.trid=tt.id AND tt.type='a' AND DATE_PART('hour', t.start AT TIME ZONE 'Australia/Sydney' AT TIME ZONE 'America/New_York')>=23 OR DATE_PART('hour', t.start AT TIME ZONE 'Australia/Sydney' AT TIME ZONE 'America/New_York')<13 GROUP BY month, type, t.a, t.b, t.d, t.e, FALSE, tt.duration any tips?

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• USB To Serial under OpenSuse 11.3

  - by Exsisto

  I have a LogiLink USB-To-Serial adapter. This has the PL2303 chip inside. When I insert the device: [26064.927083] usb 7-1: new full speed USB device using uhci_hcd and address 9 [26065.076090] usb 7-1: New USB device found, idVendor=067b, idProduct=2303 [26065.076099] usb 7-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [26065.076105] usb 7-1: Product: USB-Serial Controller [26065.076110] usb 7-1: Manufacturer: Prolific Technology Inc. [26065.079181] pl2303 7-1:1.0: pl2303 converter detected [26065.091296] usb 7-1: pl2303 converter now attached to ttyUSB0 So the device is recognized and the converter is attached to ttyUSB0. When I do screen /dev/ttyUSB0 9600 I get the error: bash: /dev/ttyUSB0: Permission denied So I went looking in the file permissions. ls -l from the /dev folder reports: crw-rw---- 1 root dialout 188, 0 2011-04-26 15:47 ttyUSB0 I added my user lars to the dialout group. When I use the commands groups under lars it shows that I'm in the group. Though I still recieve the permissions denied error, as lars, and as root. I'm trying to connect to a console cable to configure some Cisco switches. My OS is OpenSuse 11.3 x86_64 with kernel version 2.6.34.7-0.7-desktop.

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• What parts should I get for an ASRock x58 Extreme motherboard

  - by Brad Gilbert

  I just received an ASRock x58 Extreme motherboard, for my post on this question. It was a 2009 Tom's Hardware recommended buy. It is a Core i7 motherboard, with an X58 Express Chipset. It uses DDR3 RAM. What I want to know is, what parts should I get to finish it off. I'm looking for some good bargains, because of a lack of funds. The most taxing game I will probably play on it is OpenTTD. The only parts I currently have that are compatible: A Dynex 400W power supply. It appears to be an ATX 2.1 power supply, with the addition of a -5 rail. Apparently designed to be compatible with most ATX-style motherboards. Several PCI add-in cards. Mostly 10/100 Network cards Some sound cards Some video cards with a VGA connector Plenty of PATA drives. 8 GB - 80 GB Hard-drives A dozen or-so CD-ROM drives, only a handful of them are CD-RW drives. One DVD-ROM drive I have one LCD, with a 15 pin VGA connector, which I salvaged from the dump. The only thing wrong with it was some dead capacitors. It also has a stuck pixel.

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• How to prevent nginx from locking files on mounted samba partition in Centos 6

  - by Bruce Kirkpatrick

  I'm using nginx 1.3.8 inside a centos 6.3 virtualbox 4.2.4 virtual machine. The system is running the latest software available via yum update. The host OS is windows 7. The site files nginx is serving are on mounted samba partition, which is a folder on the host Windows system. I.e., inside linux, nginx paths are referring to /home/vhosts and this is mounted from D:\vhosts\ on windows. The samba partition is mounted as root with 777 privileges. /etc/fstab looks like this, but with real ip, username, password: //hostip/vhosts /home/vhosts cifs username=username,password=SECRETPASSWORD,uid=root,gid=root,file_mode=0777,dir_mode=0777,rw,_netdev 0 0 I.e. linux/nginx reads from the windows share, and not the opposite. in /etc/samba/smb.conf, I have tried to disable all samba locking features, but it seems to have no effect even after rebooting the virtual machine. locking=no share modes=no oplocks = no level2 oplocks = no kernel oplocks =no I'm receiving "Access is denied" errors in Windows or linux when attempting to overwrite the javascript file in windows that has been accessed at least once with nginx. If I run "service nginx reload", the lock is removed and I'm able to save the file. That's why I think it is nginx causing the lock. The same problem occurs with directories. However, that may be a different issue not related to the use of samba. I'm using samba so that I can manage the source code outside of the virtual machine. Also note that after I run "service nginx reload", the file I'm editing is actually automatically deleted from the windows host. SOLVED: I just reviewed my nginx.conf file. It appears the "open_file_cache" feature is what is causing the lock and deleted files. When I set this option to open_file_cache off;, My problem is resolved. I will repost as the answer when it allows me to do so.

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• Server hang - data loss on reboot, post mortem analysis

  - by rovangju

  A development server I'm responsible for (ext3 on raid 5 w/Debian Squeeze) froze up over the weekend and I was forced to reset it, as in unresponsive from KVM/physical keyboard access, no eth devices responding, etc. Not even the backup process ran (Figures, the one time I don't check for confirmation) So after the reset, it turns out that every trace of disk IO activity that should have happened for a period of ~24H is completely gone. The log files have a big gap in the dates and times. As if the writes were never committed to disk, no processes seemed to have run. Luckily it was a weekend and nothing of value would have been lost and I don't suspect a hack. What can I do in post mortem to this event - to prevent it from ever happening again? I've seen this happen before on a completely different machine running FreeBSD. I am rounding up the disk checking tools right now - but there must be more going on! Mount options: /dev/sda1 on / type ext3 (rw,errors=remount-ro) Kernel: Linux dev 2.6.32-5-686-bigmem Disk/Inodes: 13%/3%

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• ext4 filesystem corruption -- maybe hardware error?

  - by pts

  I'm getting these errors in dmesg after about half an hour after I turn on the computer: [ 1355.677957] EXT4-fs error (device sda2): htree_dirblock_to_tree: inode #1318420: (comm updatedb.mlocat) bad entry in directory: directory entry across blocks - block=5251700offset=0(0), inode=1802725748, rec_len=179136, name_len=32 [ 1355.677973] Aborting journal on device sda2-8. [ 1355.678101] EXT4-fs (sda2): Remounting filesystem read-only [ 1355.690144] EXT4-fs error (device sda2): htree_dirblock_to_tree: inode #1318416: (comm updatedb.mlocat) bad entry in directory: directory entry across blocks - block=5251699offset=0(0), inode=2194783952, rec_len=53280, name_len=152 [ 1356.864720] EXT4-fs error (device sda2): htree_dirblock_to_tree: inode #1312795: (comm updatedb.mlocat) bad entry in directory: directory entry across blocks - block=5251176offset=1460(13748), inode=1432317541, rec_len=208208, name_len=119 /dev/sda is an SSD, and it's using the noop scheduler. /etc/fstab entry: UUID=acb4eefa-48ff-4ee1-bb5f-2dccce7d011f / ext4 errors=remount-ro,noatime,discard,user_xattr 0 1 System information: $ cat /proc/mounts | grep /dev/sd /dev/sda1 /boot ext2 rw,noatime,errors=continue 0 0 $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=10.04 DISTRIB_CODENAME=lucid DISTRIB_DESCRIPTION="Ubuntu 10.04.3 LTS" $ uname -a Linux leetpad 2.6.35-30-generic-pae #61~lucid1-Ubuntu SMP Thu Oct 13 21:14:29 UTC 2011 i686 GNU/Linux I've run memtest for 7 hours, it didn't found any memory errors. Any obvious ideas what can go wrong in this case? The most reasonable thing I can imagine is that the SSD is silently dropping some write requests, which eventually leads to an EXT4 filesystem inconsistency (but no disk I/O errors). How can this happen? Is there a relevant configuration option I should ensure to be set correctly? What tools should I use to diagnose the hardware failures? Would it be possible to diagnose the SSD failure without overwriting data?

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• Zero sized tar.gz file found inside a tar.gz file

  - by PavanM

  My current directory contains a single file like this- $ls -l -rw-r--r-- 1 root staff 8 May 28 09:10 pavan Now, I want to tar and gzip this file like $tar -cvf - * 2>/dev/null |gzip -vf9 > pavan.tar.gz 2>/dev/null (I am aware I am creating the zipped file in the same directory as the original file) When I run the above tar/gzip commands around 20 times, a few times I observe that the final tarred and zipped file pavan.tar.gz file has a ZERO sized pavan.tar.gz file. I am not sure from where is this zero sized file coming into the archive from. Note: I am NOT running tar/gzip commands on an already existing tar.gz file. I always make sure that the directory has only one file before running the commands On googling, as described here, I suspected that the tar.gz being created was also part of the file being archived. But in my case, gzip is the one who's creating the final file and by the time gzip runs, tar should be done tarring. This is happening on AIX but I've used Linux tag too, to draw more attention, as I guess the problem is platform independent.

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• I had a power outage. Now MySQL's lock file won't go away. What do you suggest?

  - by jasonspiro

  I do freelance IT consulting for various clients, both in Toronto, Canada, and worldwide. A client recently experienced a power failure. Now they've been having various problems with a Slackware 12.0.0 machine which also acts as a DNS server. One problem is that they can't log into phpMyAdmin. I tried stopping and restarting MySQL. But even when MySQL is stopped, the lock file stays around. jasonspiro@cybertron:~$ sudo /etc/init.d/mysql stop Shutting down MySQL. SUCCESS! jasonspiro@cybertron:~$ sudo /etc/init.d/mysql stop ERROR! MySQL manager or server PID file could not be found! jasonspiro@cybertron:~$ sudo /etc/init.d/mysql status ERROR! MySQL is not running, but lock exists jasonspiro@cybertron:~$ ls -l /var/lock/subsys/mysql -rw-r--r-- 1 root root 0 2012-07-05 16:18 /var/lock/subsys/mysql Why is MySQL's lock file hanging around despite the fact that MySQL isn't running? Can I simply stop MySQL, delete the lock file, and start MySQL again? Are there any other steps that I should take next, or nothing?

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• locked files on HFS+ home partition shared between OSX/Linux

  - by HazyBlueDot

  I dual boot into Arch Linux and OS X 10.6 on my MacBook pro. I synced my UID between both OSes and created an HFS partition (with no journaling) to use as a shared home/Users partition. For the most part it works just as I'd expect, but sometimes when I'm booted into OS X certain files are "locked" (when I get info on a particular file the "Locked" box is checked under the "General" pane. I can resolve the issue by manually unchecking the box) and/or I get "Operation not permitted" when I try deleting or chmod'ing a file. In both cases I don't see anything out of the ordinary on the permission bits displayed with ls -l, except for a trailing '@' character in the position where the sticky bit would normally occur: -rw-r--r--@ 1 myuser mygroup 296 Mar 29 11:44 myfile This '@' character shows up on ALL normal files, so doesn't seem to be linked to the locked/operation not permission situation. On the Linux side of things I never have permission problems. To the best of my limited knowledge and experience with ACLs I've not found any ACLs on any of the files in question. For what it's worth, I do most of my file editing using emacs (Aquamacs in OSX), is it possible it is setting weird permission bits? What is the "locked" setting that OS X uses and does it have a permission bit equivalent (so at the very least I could recursively unlock all files in my home directory from the terminal) why might some, but not other files get "locked" when booting into OS X what is the meaning of the '@' character?

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• Find out the type of an automounted device

  - by Steve Bennett

  I'm working on a system (Ubuntu Precise) with a mount defined in /etc/fstab as follows: /dev/vdb /mnt auto defaults,nobootwait,comment=cloudconfig 0 2 Originally I just wanted to find out if it's NFS (due to potential MySQL locking issues). Judging from man mount, it's not: If no -t option is given, or if the auto type is specified, mount will try to guess the desired type. Mount uses the blkid library for guessing the filesystem type; if that does not turn up anything that looks familiar, mount will try to read the file /etc/filesystems, or, if that does not exist, /proc/filesystems. All of the filesystem types listed there will be tried, except for those that are labeled "nodev" (e.g., devpts, proc and nfs). If /etc/filesystems ends in a line with a single * only, mount will read /proc/filesystems afterwards. But, out of curiosity now, how can I find out more about what type of device it actually is? (For context, this is a VM running on OpenStack. The device is a 60Gb allocation mounted from somewhere - but I don't know how.)` EDIT Including answers here: $ mount /dev/vdb on /mnt type ext3 (rw,_netdev) $ df -T /dev/vdb ext3 61927420 2936068 55845624 5% /mnt

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• NFSv3 + ACL: mask is gone on clients

  - by Jorge Suárez de Lis

  I'm sharing a NFS folder among a user group. The default umask on the clients is 0700, and this is a problem because newly created files won't be readable/writable by another users. So, I'm using ACLs to force the umask 0770 on the shared folder, and this works OK on the server, but not on the clients. server # getfacl /export/proyectos getfacl: Eliminando «/» inicial en nombres de ruta absolutos # file: export/proyectos # owner: root # group: root user::rwx group::rwx other::r-x default:user::rwx default:group::rwx default:mask::rwx default:other::r-x server # getfacl /export/proyectos/innovacion getfacl: Eliminando «/» inicial en nombres de ruta absolutos # file: export/proyectos/innovacion # owner: root # group: proyecto-innovacion # flags: ss- user::rwx group::rwx mask::rwx other::--- default:user::rwx default:group::rwx default:mask::rwx default:other::--- As you see, the default (and also a specific on the second directory) mask ACLs are being applied. I mount the whole share on the client: 172.16.54.56:/export/proyectos on /proyectos type nfs (rw,noatime,rsize=131072,wsize=131072,acregmin=10,acl,nfsvers=3,addr=172.16.54.56) But the mask and default:mask ACLs are gone. client $ getfacl /proyectos/ getfacl: Eliminando «/» inicial en nombres de ruta absolutos # file: proyectos/ # owner: root # group: root user::rwx group::rwx other::r-x default:user::rwx default:group::rwx default:other::r-x client $ getfacl /proyectos/innovacion getfacl: Eliminando «/» inicial en nombres de ruta absolutos # file: proyectos/innovacion # owner: root # group: proyecto-innovacion # flags: ss- user::rwx group::rwx other::--- default:user::rwx default:group::rwx default:other::--- It lacks the default:mask and mask ACLs, the only ones that I've setted. So the proposed solution to enforce umask won't work for me. Why is happening this?

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• Apache 2.4, Ubuntu 12.04 Forbidden Errors

  - by tubaguy50035

  I just installed Apache 2.4 today, and I'm having some issues getting vhost configuration to work correctly. Below is the vhost conf <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /hosting/Client/site.com/www ServerName site.com ServerAlias www.site.com <Directory "/hosting/Client/site.com/www"> Options +Indexes +FollowSymLinks Order allow,deny Allow from all </Directory> DirectoryIndex index.html </VirtualHost> There is an index.html file in /hosting/Client/site.com/www. When I go to the site, I receive a 403 forbidden error. The www-data group is the group on the www folder, which I've already given all permissions (r/w/x). I'm really at a loss as to why this is happening. Any thoughts? If I remove the vhost and go straight to the IP address, I get the default, "It works!" page. So I know that it's working. The error log says "client denied by server configuration". apache2ctl -S dump: nick@server:~$ apache2ctl -S /usr/sbin/apache2ctl: 87: ulimit: error setting limit (Operation not permitted) VirtualHost configuration: *:80 is a NameVirtualHost default server site.com (/etc/apache2/sites-enabled/site.com.conf:1) port 80 namevhost site.com (/etc/apache2/sites-enabled/site.com.conf:1) alias www.site.com port 80 namevhost site.com (/etc/apache2/sites-enabled/site.com.conf:1) alias www.site.com ServerRoot: "/etc/apache2" Main DocumentRoot: "/var/www" Main ErrorLog: "/var/log/apache2/error.log" Mutex watchdog-callback: using_defaults Mutex default: dir="/var/lock/apache2" mechanism=fcntl Mutex mpm-accept: using_defaults PidFile: "/var/run/apache2.pid" Define: DUMP_VHOSTS Define: DUMP_RUN_CFG Define: ENALBLE_USR_LIB_CGI_BIN User: name="www-data" id=33 not_used Group: name="www-data" id=33 not_used Ouput of namei -mo /hosting/Client/site/www/index.html f: /hosting/Client/site.com/www/index.html drwxr-xr-x root root / drwxr-xr-x root root hosting drwxr-xr-x root root Client drwxr-xr-x nick www-data site.com drwxr-xr-x nick www-data www -rw-rwxr-x nick www-data index.html

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• How to enable error log in lighttpd properly?

  - by Tomaszs

  I have a Centos 5 system with Lighttpd and fastcgi enabled. It does log access but does not log errors. I have Internal Server Error 500 and no info in log and when I try to open not -existing file also - no info in error log. How to enable it properly? Below is list of modules that I've enabled: server.modules = ( "mod_rewrite", "mod_redirect", "mod_alias", # "mod_access", # "mod_cml", # "mod_trigger_b4_dl", # "mod_auth", "mod_status", "mod_setenv", "mod_fastcgi", # "mod_webdav", # "mod_proxy_core", # "mod_proxy_backend_fastcgi", # "mod_proxy_backend_scgi", # "mod_proxy_backend_ajp13", # "mod_simple_vhost", # "mod_evhost", # "mod_userdir", # "mod_cgi", # "mod_compress", # "mod_ssi", # "mod_usertrack", # "mod_expire", # "mod_secdownload", # "mod_rrdtool", "mod_accesslog" ) Here are setting of debugging: ## enable debugging #debug.log-request-header = "enable" #debug.log-response-header = "enable" #debug.log-request-handling = "enable" debug.log-file-not-found = "enable" #debug.log-condition-handling = "enable" Setting of path to error and access log: ## where to send error-messages to server.errorlog = "/home/lxadmin/httpd/lighttpd/error.log" #### accesslog module accesslog.filename = "/home/lxadmin/httpd/lighttpd/ligh.log" Settings of fastcgi: fastcgi.debug = 1 fastcgi.server = ( ".php" => (( "bin-path" => "/usr/bin/php-cgi", "socket" => "/tmp/php.socket", "max-procs" => 12, "bin-environment" => ( "PHP_FCGI_CHILDREN" => "2", "PHP_FCGI_MAX_REQUESTS" => "500" ) ))) And in included config file I have: server.errorlog = "/home/httpd/mywebsite.com/stats/mywebsite.com-error_log" What comes to log files: /home/httpd/mywebsite.com/stats/ -rw-r--r-- 1 apache apache 5173239 May 16 11:34 mywebsite.com-custom_log -rwxrwxrwx 1 root root 0 Mar 27 2009 mywebsite.com-error_log /home/lxadmin/httpd/lighttpd/ -rwxrwxrwx 1 apache apache 2184 Apr 22 22:59 error.log -rwxrwxrwx 1 apache apache 6088621 May 16 11:26 ligh.log I gave error logs chmod 777 for a try to check if it's the issue, but apparently it's not. So my question is: what to do to have error log enabled?

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• Windows Share authentication from Active Directory Linux login

  - by Kenny

  I'm using Active Directory to log into RHEL. To do this, I followed the steps outlined here: http://www.markwilson.co.uk/blog/2007/05/using-active-directory-to-authenticate-users-on-a-linux-computer.htm I'd like to be able to read data from Windows Servers shared folders without being prompted for a password. On Windows I log into an AD domain, and when I access windows file shares on a server on the LAN (also part of the AD domain) my I can just access them with no authentication step. I've used SMBclient on Linux to access these shares, but it asks for my password. I would like to be able to script access to the data on the shares, but I can't if there's a password prompt in the way. Well, I could, but it's not how I want to do it. Now, since I'm logged in using my active directory username & password, can't I just access the shares without jumping that extra hoop? I know I can mount the share using something like: //192.168.0.5/share /mnt/windows cifs auto,username=steve,password=secret,rw 0 0 but access will depend who is logged in... each user logging in should have their own unique AD access privelages. Thanks for reading!

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