CentOS 5 :: LVM /dev/ Device Not Being Created?

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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CentOS 5 Hardware :: Why USB Touch Screen Device Not Created

Jun 19, 2011

Why a usb touch screen device is not created on /dev? It can be detected on lsusb but no particular dev location like /dev/input/event0 or something like that. I've already updated my kernel for 5.6. do i need a driver to be able for this device to have a dev? No calibration tool works on this hardware. Same also on my tm u220 usb printer. It can be detected but no /dev/usb/lp0 being created.

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Software :: Cann't Find The Device Created Through Device Mapper In /proc/partitions?

May 15, 2011

Recently, I created a device sc0 through device mapper. The divice could be found in /dev/mapper/sc0. My problem is that the device doesn't exist in /dev/partitions which will block my following test.BTW, I found dm-0 in /dev/partitions. Is it the same as /dev/mapper/sc0? But the device /dev/dm-0 doesn't exist!

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Debian Hardware :: Acer, Inc BisonCam, NB Pro - Does Not Have A Device Created

Aug 23, 2010

I have the following webcam installed:Bus 001 Device 002: ID 5986:0241 Acer, Inc BisonCam, NB Pro The kernel (linux 2.6.32-5-686) successfully recognizes it. issuing lsmod shows:

[code]....

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General :: 1TB Hard Disk Partition - Device Not Created

Apr 30, 2010

I have installed 1tb hard drive and would like to partition as follows:

1) / - 20g
2) /swap - 6G
3) /photos /150g
4) /videos /500g
5) /audio /300g

After 2-3 partition an extended partition automatically created in which I am not able to create specified capacity i.e., say I want 150g of /photos partition, the /videos partition is automatically reduced and a free space at the end appears. Some free space is always there which i am not able to understand. Nevertheless i clicked to create, but I get an error viz. 'device not created'.

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Red Hat / Fedora :: Can ISO Be Created From Installed CentOS

Jan 29, 2009

I installed CentOS 5.2 and it was fine. Later I installed some third party applications. Is this possible to create again ISO image from this install? Or alternatively how one rpm package can be added to the CentOS iso cds.

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CentOS 5 :: Why Do Files Created Via Samba Have Nobody Ownership?

Apr 21, 2011

files and directories are NOT being created with consistent ownership and permissions: when created via Samba, they are created with user/group = nobody, and when created via the OS, they are being created with user/group = root.This causes problems with our automated tools that access the server (via Samba) and do a variety of file system operations (which need root privileges).How do I cofigure Samba so files/directories are created with user/group = root?

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CentOS 5 :: Specify The Device Driver When Mounting A Device?

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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CentOS 5 :: Unable To Login To The Console With The New User Created

Feb 25, 2011

I had successfully installed centOS,i am able to login as root.I created local users.But unable to login via console and FTP.As per the logs there were some LDAP issue,so i disabled LDAP and disabled PAM config as well.Now i am able to login to the FTP with the local users created.unable to login to the centOS console with the local user.

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CentOS 5 Server :: Fail2Ban Is Up And Running - IPtables Rules Not Created

Nov 18, 2009

I have been trying for days now to get this to work. didn't want to bother people with my questions, i have installed Fail2Ban 0.8.4 on CentOS 5.4.

I get the email notifications from Fail2Ban stating that it just blocked another IP, however, when i look at the iptables through webmin, nothing is actually in there, also the log/secure file dose not show that the ip has been blocked.

Even when I try to log-in with the wrong password, after a few tries i get the email telling me that my ip is blocked, however, I can still SSH using my 'blocked' IP.

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CentOS 5 :: Write A Script That Will Find Recently Created Directories?

Sep 16, 2010

I'm using CentOS 5.5. I am trying to write a script that will find recently created directories (touched within 30 days) and create a symbolic link to those directories in another folder. Here is the script:

#!/bin/sh
cd /home/chris/Documents/;
rm -rf ./recent_files/*;
find ./ -maxdepth 1 -mindepth 1

[code]...

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CentOS 5 :: How To Change Owner Of Copied Files To Newly Created Users

Jan 29, 2010

CentOS 5.4 install, likewise open standard install (For active directory authentication).I have a license service which requires a license.txt be in the users home directory.The group owner for license.txt must be the same as the license service. Whenever a new domain user logs in, it creates the all the appropriate files but the group owner for license.txt is the users domain group. My current workaround seems like more effort than it's worth, is there another way to get this process solved easier/more secure?

- copy the license.txt into /etc/skel

- created a script to check for the presence of license.txt, check it's permissions and change them if necessary

- gave the domain's group sudo [nopasswd] access to the script (the script is not writable)

- execute the script in /etc/bashrc

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General :: Add Additional Search Domains To The Resolv.conf Created By Dhclient In CentOS?

Feb 19, 2010

When my CentOS virtual machine boots it uses DHCP to get an IP address. It also overwrites resolv.conf with the DNS settings provided by the DHCP server. The DHCP server doesn't supply any search domains so I would like to get dhclient to put in a list of search domains when it writes it. How can I configure dhclient to do this?

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CentOS 5 Networking :: Ifcfg-eth0.bak File Created By Kudzu In VMware Clone Of 5.3

Jul 12, 2010

I run a VMware clone of CentOS 5.3, I observe that kudzu [i.e. /etc/init.d/kudzu, from /etc/rc3.d/S05kudzu or /etc/rc5.d/S05kudzu] detects a MAC address change on eth0 and then creates a /etc/sysconfig/network-scripts/ifcfg-eth0.bak file. This .bak file is identical to the original ifcfg-eth0 file except for the value of the HWADDR [i.e. MAC address] parameter. I would be unconcerned but for the fact that /usr/bin/neat indicates that both ifcfg-eth0 AND ifcfg-eth0.bak are 'Active'. The following solution may help others with the same (or similar) problem:

[Code]...

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CentOS 5 Hardware :: CentOS 5.2 And 5.3 Does Not Recognize Device On IDE IT8213 Controller?

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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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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CentOS 5 :: CentOS 5.3 I386 Cannot Support Device Larger Than 2TB?

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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General :: Partitioning - Difference Between File System Created By Fdisk And File System Created By Mkfs?

Aug 1, 2011

I'm a little bit confused with partitioning the filesystem in Linux. the difference between creating the file system with fdisk and mkfs (when formatting the disk). I can't clearly tell my problem, so please look at this picture:

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Networking :: Cannot See NAS Device In Centos

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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General :: Use A Removable Device In CentOS?

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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CentOS 5 :: No Space Left On Device?

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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CentOS 5 :: Configure The Bluetooth Device Through 5.4?

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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CentOS 5 :: Move To A Removable Device

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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CentOS 5 :: VFS - Cannot Open Root Device

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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General :: CentOS - Determine IP For Network Device

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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General :: Centos 5.5 Need To Extend A Device Partition

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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CentOS 5 :: Eth0/1/2 Device Hangs On Boot Up?

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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CentOS 5 Hardware :: Attempt To Access Beyond End Of Device

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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CentOS 5 :: Software RAID Device Not Recognised?

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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CentOS 5 Networking :: Eth0 Device Not Present?

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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