CentOS 5 Hardware :: CentOS USB Device (Velleman K8055) Not Showing Up
Sep 6, 2010
I'm experimenting with a K8055 board, connected through USB to our Asterisk server,running on CentOS. If I connect the device I can see it being connected by watching /var/log/messages. Also the device is mentionned in /proc/bus/usb/devices. But when I do lsusb the device isn't showing up and it should be showing up! If it is not listed with lsusb, I can't connect to it through the k8055 executable...
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Apr 3, 2009
I have had a Supermicro X7DCL-3 motherboard based machine, running CentOS 5.2 x86_64, recently upgraded to 5.3.Strangely enough, although I must have installed the 5.2 using DVD disk, the running system does not show the DVD drive. The machine was not used very much so I noticed that only today, after the update. There is no trace of it in 'dmesg', thera are no /dev/cd* and/or /dev/dvd* devices. The IDE controller is IT8213 (as shown by 'lspci'). In 5.2 kernel (2.6.18-92.el5-x86_64) lspci says "unknown device". I have checked the /usr/src/kernels/*/.config files and both kernels (5.2 and 2.6.18-128.el5-x86_64 of 5.3) seam to have the support for that controller added into the kernel:CONFIG_BLK_DEV_IT821X=yAny idea why it is not working? The Supermicro has apparently noticed this also as their OS compatibility chart lists the IDE interface for that motherboard as supported up to RHEL 5.1 but not for 5.2.
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May 20, 2009
I have been using SLES 10 SP1 so far with about 6TB Raid system without problems.I have upgraded the OS to CentOS 5.3 i386 and I have noticed the kernel can not recognize raid system larger than 2TB.Is there any parameters that I have to set ? or the i386 distribution simply does not support larger raid, so I have to use x86_64 version, instead?
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Jul 28, 2010
I have installed live cd on usb pendrive. Everything works great. How can I find out which device driver it is using? Where are the device driver files stored? How do you specify the device driver when mounting a device?
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Jun 14, 2010
I'm having this problem with my CentOS install
when i run df -h i get something like this:
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
672G -551M 638G 0% /
/dev/hda1 99M 12M 82M 13% /boot
tmpfs 2.0G 0 2.0G 0% /dev/shm
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Mar 19, 2010
Apache httpd.conf (with server identity info removed)
CentOs 5.4 system info
I have a problem I've been banging my head against for hours.
I can't get an aliased folder to turn up: I just get a 404.
I've chowned the folder to apache:apache and most of it is chmod to 755. I tell apache of the changes, and have even tried restarting a few times.
I'm expecting it to turn up like this yyy.com/laura_shop/
(within which is a php script to do a shopping cart)
The apache directives look similar to what I have on my dev computer (which is Windows, mind you).
The directory and alias are defined within my main virtual server which you can see here:
virtual host conf directives
(see at top of the message if you would like to see the whole httpd.conf file)
I realise this is more of an apache/linux problem but perhaps familiarity with CentOS may get me the right answer quicker.
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Apr 25, 2011
i m using Centos 5.4 Dovecot and Sendmail serve my secondary server have some problems and shwoing me BOGUS files in var/mail
m using Centos 5.4 wiht dovecot and Sendmail my all users receiving a message 20times every time when they press their send/receive button three messages are repeating on every system i deleted all mail from my accounts but some of my accounts facing this problem
i have another problem when i insert my Cd or DVd in DVDwrite on my server and mount him mount /dev/scd0 ---- it dispaly that dev/scd0 does not exist in et/fstab i tried it clicking on DVDWriter Mount but seems error no media,..
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Apr 4, 2009
I want to change one of our poweredge 6450 servers over to Linux, specifically CentOS, however, I cannot seem to install the operating system. When I boot to setup, go through the first couple of pages and then go to the page that asks you where to install CentOS, no drives are shown in the list, and I can't continue. I'm guessing there are missing drivers for the SCSI controller or something along that lines, but I'm not sure, and I can't find any answers on Google either.
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Sep 14, 2009
I am running FTP server using vsftpd 2.0.5-12 on Centos 5.3 64bit with default settings, annonymous access enabled. Each night new files are created and moved into a FTP subdirectory (/var/ftp/spectra) by a script. The files are owned by a local user/group, not root, and the same holds for the /var/ftp/spectra subdirectory. The new files are not visible via FTP. Only visible are files that were created the same day when I made the directory /var/ftp/spectra. Also files that are created "in place", e.g. by vi, are visible until I change their owner/group. This is the situation when vsftpd is runned as a system service (/etc/init.d/vsftpd start).
When I start the vsftpd directly using the command /usr/sbin/vsftpd (both without or with the configuration file specified), all files are visible and normally accessible via FTP.
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Feb 11, 2011
I try to install #yum groupinstall 'Development Tools' it's install all things but at the end it's showing error
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Jun 5, 2009
I've added a new LUN to my Centos 5.2 server using Powerpath and have added it to an ext3 logical volume. I extended the logical volume using lvextend and the new space shows up correctly in lvdisplay. What I'm having problems with is getting Centos to see the new disk space (df -h shows 500GB, not 600GB as expected). I've tried running a resize2fs on the new volume but it tells me that "the filesystem is already n blocks long. Nothing to do". Does any one know where I'm going wrong? If possible I'd like to sort this without a reboot.
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Jul 16, 2009
I'm having a problem accessing files via nfs where an iso has been mounted through the loop device on the nfs server. Basically what I am attempting to do is access the 6 CentOS 5.2 ISO's via NFS from one of my client machines. The client is able to mount the share and see its sub directories leading up to the mount point of the ISO, but the contents of the mounted ISO image are simply not visible (on the client, they are visible on the server).
Server config (CentOS 5):
/etc/fstab:
/home/user/iso/CentOS-5.2-x86_64-bin-1of7.iso /exportiso/centos/x64/5.2/disc1 iso9660 defaults,loop 0 0
[code].....
NFS is working correctly for other mounts between these two boxes, however.
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Oct 14, 2009
We just setup a HP DL380 with CentOS 5, and ran all of the latest updates.I am trying to attach a Compaq array (no model number) that is SCSI attached. I can see the array from the bios and created a raid group on it from there. However, from LVM and lvscan, I don't see it at all. I checked dmesg and there are no errors.Also, interestingly /proc/scsi/scsi is empty.
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Jul 7, 2010
i have encounter strange situation i have set all my network configuration via /etc/sysconfig/network-scripts/ifcfg-eth0 ,eth0.2 ,eth1 etc ....i have used only once Gnome network manage settings to add routing since then all my network config change although all files mention above showing the same config i have set initially and same for Gnome network Manager.
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May 14, 2010
I've installed sinhala unicode support to my CentOS 5.4 machine, after that firefox able to render sinhala web pages well but browser title bar still doesn't showing sinhala letters. I've changed the default font in the browser to sinhala font but still have that problem.
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Dec 15, 2010
Not sure if this is a networking issue or not but I have a Buffalo drive NAS device that I have my mp3 on. I can see it from my Ubuntu laptop, I can see it from my windows laptop. However when I go to my centos system and the networking option under the places menu nothing comes up. I do see a workgroup and a network option. I tried both but just opens a blank folder. How can I get this drive to mount to my centos system?
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Feb 3, 2010
We are having issues with LVM on CentOS 5.4 both 32bit and 64bit on one particular machine. I just can't get my head around it. Usually a device in /dev/ is created when a LVM Volume Group is created. e.g. if you add a volume group called foo, you would have /dev/foo to work with to access LVs inside the volume group.
For some reason it's not being created. The udev service is running, the volume group is created ok, I cant see anything strange in logs or strace.
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Sep 25, 2010
I knew how to mount it and I was able to view files and folder in it but I don't know how to copy files using CUI (Command not GUI) mode. I have six separate iso files and I want to make a DVD in the removable device.
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Apr 10, 2009
I am trying to copy some files onto a flash card. The first thing that i do is mount to the flash card:
mount /dev/sdc1 /mnt
then i try and copy a file
cp dev.bin /mnt
but i get a message saying:
cp: writing `/mnt/dev.bin': No space left on device
I was able to copy some files before but i cant seem to do it anymore.
how can i delete everything thats on the flash card so that i can copy files onto it?
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Dec 16, 2009
I'm using CentOS 5.4 x86_64 on my Dell Inspiron 1440 laptop. How can I configure my bluetooth device through CentOS?
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Sep 20, 2010
I have an External HDD which has a Data directory in it and I want to move to this directory to use the script mkdvdiso.sh to combine six separate iso file (of CentOS, of course). The syntax of this script is:./mkdvdiso. sh /source /destination/DVD.iso.I don't know what to replace source and destination parameters with.
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Mar 22, 2011
I have added CentOS5.5 x86-64 to a linux box that already contains installations of Ubuntu 9 and SL 5.2. Grub2 was installed with Ubuntu and is on the MBR of the disk. I did not install grub with anaconda/Cent. Grub update in ubuntu finds the Cent install and addes it to the grub.conf, and Cent appears in the grub menu at boot. If I select Cent, I get the following error.
VFS: Cannot open root device "sda7" or unknown-block(0,0)
Please append a correct "root=" boot option
Below is the output of boot_info_script, which gives the relevant boot file data. There are still grub conf files on the SL install, but grub is not installed there anymore.
Boot Info Script 0.55 dated February 15th, 2010
=> Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in partition #6 for /boot/grub .....
sda3/boot/grub/grub.conf:
# grub.conf generated by anaconda
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You do not have a /boot partition. This means that all kernel and initrd paths are relative to /, eg.
# root (hd1,2)
# kernel /boot/vmlinuz-version ro root=/dev/sdb3
# initrd /boot/initrd-version.img
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Aug 4, 2010
Problems with xen 3.1.2 creating and installing domU CentOS 5.5 I am trying to do a virt-install --prompt --paravirt, and the install error out while trying to download install RPMs. I have googled for xen centos virt-install and various permutations. I have found similar howtos for 5.4 and 5.3, but they resulted in the same outcome. I did find several posts with similar issues, but no solution was posted.[URL]..
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Feb 9, 2011
I am in the process of building a new server on an Asus P5QPL-AM motherboard and an Intel E8600 processor.explain to me the difference between the two versions and what would you recommend.Also, is there any advantage of SATA over IDE hard drives?
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Sep 20, 2010
When CentOS boots up, it tries to determine the IP for a network device (eth0) and fails.
'Determining IP information for eth0... failed; no link present.'
I'm curious to know how, after booting up, I could set the IP information for a wireless device, wlan0, manually. Another way of putting this questions is: if CentOS is able to determine IP information for a network device on bootup, what settings is it configuring exactly?
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Sep 23, 2010
Have VMWARE workstation 7. Have to extend partition /dev/sda1 mounted to /home/user
1. Originally /dev/sda was 10gb I've extended device via VMWARE to 30gb.
2. When I do: fdisk /dev/sda it tells me that /dev/sda 30gb
3. when I check: df -h /home
it shows 10GB
4. How I can make Linux see the 30gb at /home/user?
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Apr 5, 2010
i have 5.4 installed on a super-micro server motherboard (has two gigabit ether ports). when i boot while its initializing everything it gets to the "starting eth0" and just stays there?
right before it boots up and says press any key for options i press a key and choose "centos (2.6.18-164.el5)" and it boots up fine but when i choose "centos (2,6,18-164.el5xen)" the problem occurs. and that is the default boot option.
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Jul 6, 2010
I have a LVM snapshot that triggers these kernel errors when any LVM-related commands run:
Jul 6 10:31:38 itmanager kernel: attempt to access beyond end of device
Jul 6 10:31:38 itmanager kernel: dm-28: rw=0, want=66156996183394672, limit=25165824
dm-28 is the snapshot volume in device mapper. I think this error is generated because most LVM commands will check the first 4K of various drives and volumes for LVM metadata and labels, but attempts to read any of the first eight sectors (ie: 4K) of this particular snapshot logical volume trigger this error.The most interesting thing is that the snapshot is 25165824 sectors long (12G), but attempts to access the first eight sectors result in an attempt to access sector 66156996183394672!I've obtained an info dump from getinfo.sh disk, and added the output from lvs. You can find the results here:URL.. It's not as if the sectors that back the first 4K of the volume are corrupt, either: the read request never hits any hardware because the read request is attempting to read a non-sensical sector, instead of the correct sector. Perhaps the COW metadata for the snapshot is corrupt?
How do I find the cause of this problem?Is this a critical error that I should file a bug report for?I first noticed this some time after turning the machine on Sunday afternoon.As far as I can tell from the logs, the shutdown the previous evening was normal.I use LVM fairly heavily on this machine, and this is the first time I've ever seen this kind of problem..I've worked around the problem by copying the first eight sectors from the Origin volume, and the rest from the Snapshot volume, to a new normal logical volume.However, I'm still concerned about how this error occurred in the first place.
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Aug 3, 2010
We ran out of space on our server hard drive, so I installed 2 x 1GB drives, set them up as a software RAID1 array, copied the contents of /home to it, mounted it as /home for testing. Everything OK, so I unmounted it,deleted the contents of the /home folders (don't worry, we're backed up), then remounted the array. Everything was fine until we rebooted.Now I can't access the array at all; during booting the error "mount: special device /dev/md1 does not exist" comes up twice, and manually trying toe same issue.The relevant line from fstab reads:/dev/md1 /home ext3 defaults 0 0.However, using webmin shows only md0, the RAID0 device on which the OSD was originally installed.There is no /dev/md1 device file.The mdadm.conf file reads as follows:
# mdadm.conf written out by anaconda
DEVICE partitions
MAILADDR root
ARRAY /dev/md0 level=raid0 num-devices=2 uuid=76fd4050:fb820568:c9bd3a59:ad3e70b0
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Dec 21, 2010
Installed Centos 5 on IBM T60P laptop. Intel 82573L Gigabit ethernet controller. Keep getting this erro message, "e1000 device eth0 does not seem to be present, delaying initialization."
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