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• My Laptop Beeps when I try to USB boot install

  - by Gino

  I tried to boot install Ubuntu using my laptop (without CD Drive) using a USB drive, then it goes to the boot selection menu (the one with the Ubuntu logo installation options). I selected Install then my laptop just beeps - 1 short beep, after that it stops then nothing installs, it just stays at the installation menu, can someone please help? Laptop Specs Neo Notebook (forgot the model version) 2GB RAM running Win XP SP3 150GB Hard Drive memory Would really appreciate if someone helped, I just used the normal 12.04 installer.

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• Issue with running apt-get clean && apt-get autoclean

  - by nishanche

  root@T60ubuntuSVR:~# apt-get clean && apt-get autoclean Reading package lists... Done Building dependency tree Reading state information... Done root@T60ubuntuSVR:~# deborphan | xargs aptitude --purge remove The program 'deborphan' is currently not installed. You can install it by typing: apt-get install deborphan The following packages will be REMOVED: amarok-help-en{pu} dnsmasq-base{pu} kvpnc-data{pu} libnetfilter-conntrack3{pu} libutouch-evemu1{pu} libutouch-frame1{pu} libutouch-geis1{pu} libutouch-grail1{pu} linux-headers-3.2.0-24{pu} linux-headers-3.2.0-24-generic-pae{pu} linux-headers-3.2.0-25{pu} linux-headers-3.2.0-25-generic-pae{pu} linux-headers-3.2.0-26{pu} linux-headers-3.2.0-26-generic-pae{pu} linux-headers-3.2.0-27{pu} linux-headers-3.2.0-27-generic-pae{pu} linux-headers-3.2.0-29{pu} linux-headers-3.2.0-29-generic-pae{pu} linux-headers-3.2.0-31{pu} linux-headers-3.2.0-31-generic-pae{pu} linux-headers-3.2.0-32{pu} linux-headers-3.2.0-32-generic-pae{pu} linux-headers-3.2.0-33{pu} linux-headers-3.2.0-33-generic-pae{pu} modemmanager{pu} usb-modeswitch{pu} usb-modeswitch-data{pu} The following partially installed packages will be configured: linux-generic-pae linux-image-generic-pae{b} 0 packages upgraded, 0 newly installed, 27 to remove and 50 not upgraded. Need to get 0 B of archives. After unpacking 554 MB will be freed. The following packages have unmet dependencies: linux-image-generic-pae : Depends: linux-image-3.2.0-34-generic-pae but it is not going to be installed. The following actions will resolve these dependencies: Remove the following packages: 1) linux-generic-pae 2) linux-image-generic-pae Please tell me how to fix it.

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• Is it possible to run an Automator workflow when a USB device is connected?

  - by pkaeding

  I would like to run an Automator workflow every time I connect a certain thumbdrive to my OS X Snow Leopard system. This workflow will copy certain files from my hard drive onto the thumb drive. I have the workflow part figured out, but I don't know how to trigger it. Ideally, I wouldn't need to do anything; it would run as soon as the drive is mounted. Is this possible? Am I approaching this from the wrong angle? The solution only really needs to work on Snow Leopard. Thanks!

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• Can't mount external hard drive

  - by tezza

  i have a problem accessing the data on my external hard drive. I recently did a fresh install but mistakenly left my external hard drive plugged in. When I tried to access the data on the external HDD, it says "no files" but recognizes that there is 290 GiB of data on it. The HDD is 350GB big. I checked the drive with Disk Utility and it showed that the hard drive had a bootable flag. So, in the edit partition, I unchecked this bootablity. Now it won't mount in Ubuntu and now my XP can't recognize it at all, whereas I could access the data on the XP machine before. In disk utility, it doesn't give me the option to check the bootable box in again and I can't access the data on XP either. Any ideas on how to fix it?

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• Installing Ubuntu by writing on the Hard Drive

  - by Alexandros Marinos

  I have a laptop whose CD drive is not operational and is too old to boot from a flash stick. I have bought a new hard drive for it for which I have an enclosure. Is there a way to configure the disk as an external to my current ubuntu setup, copy some form of ubuntu on the hard drive, place the HD in the old laptop, and have ubuntu install ubuntu from there? Effectively what I am asking about is some sort of live cd that installs on itself (since the HD is writeable).

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• Pantech Link II, Ubuntu and Virtual XP

  - by user85041

  Okay this is my problem. I have a Pantech Link II, dmesg states: [ 896.072037] usb 2-3: new high-speed USB device number 3 using ehci_hcd [ 896.258562] cdc_acm 2-3:1.0: ttyACM0: USB ACM device [ 896.260039] usbcore: registered new interface driver cdc_acm [ 896.260042] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters Have it installed through wine (pc suite and driver) and it doesn't see it. Virtual XP through VMWare Player sees my device, knows it needs a driver. The removable devices says Curitel Pantech USB Device (Maybe Driver). I have PC Suite installed in XP, I install the driver through the executable.. it says problem with installing hardware, and then it disappears. Ubuntu sees it after restart, but if I start XP with that driver installed, it disappears from both and I get these errors in dmesg: [ 1047.760555] /dev/vmmon[2882]: PTSC: initialized at 3093322000 Hz using TSC, TSCs are synchronized. [ 1048.174033] /dev/vmmon[2882]: Monitor IPI vector: 0 [ 1055.293060] /dev/vmnet: open called by PID 3163 (vmx-vcpu-0) [ 1055.293074] /dev/vmnet: port on hub 8 successfully opened [ 1055.293088] /dev/vmnet: open called by PID 3163 (vmx-vcpu-0) [ 1055.293094] /dev/vmnet: port on hub 8 successfully opened [ 1072.446305] /dev/vmnet: open called by PID 3163 (vmx-vcpu-0) [ 1072.446316] /dev/vmnet: port on hub 8 successfully opened [ 1072.446328] /dev/vmnet: open called by PID 3163 (vmx-vcpu-0) [ 1072.446334] /dev/vmnet: port on hub 8 successfully opened [ 1072.856024] usb 1-1: reset high-speed USB device number 2 using ehci_hcd [ 1079.292024] usb 1-1: reset high-speed USB device number 2 using ehci_hcd [ 1079.732024] usb 1-1: reset high-speed USB device number 2 using ehci_hcd [ 1127.743034] NET: Registered protocol family 39 [ 1127.749320] [3163]: VMCI: IOCTL_VMCI_QUEUEPAIR_ALLOC (cid=1522210225,result=4). [ 1144.104031] usb 2-3: reset high-speed USB device number 3 using ehci_hcd [ 1144.412031] usb 2-3: reset high-speed USB device number 3 using ehci_hcd [ 1155.889976] ehci_hcd 0000:00:13.2: force halt; handshake ffffc90000642024 00004000 00000000 -> -110 [ 1155.889980] ehci_hcd 0000:00:13.2: HC died; cleaning up [ 1155.890008] usb 2-3: USB disconnect, device number 3 [ 1155.890013] usb 2-3: usbfs: usb_submit_urb returned -110 [ 1658.310777] [3163]: VMCI: IOCTL_VMCI_QUEUEPAIR_DETACH (cid=1522210225,result=3). [ 1658.392018] NET: Unregistered protocol family 39 [ 1666.546438] /dev/vmnet: open called by PID 3163 (vmx-vcpu-0) [ 1666.546450] /dev/vmnet: port on hub 8 successfully opened [ 1666.546462] /dev/vmnet: open called by PID 3163 (vmx-vcpu-0) [ 1666.546467] /dev/vmnet: port on hub 8 successfully opened [ 1671.431383] uvcvideo: Found UVC 1.00 device USB2.0 Camera (1871:0101) [ 1671.432533] input: USB2.0 Camera as /devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1:1.0/input/input13 lessa@X:~$ dmesg|tail [ 1155.890008] usb 2-3: USB disconnect, device number 3 [ 1155.890013] usb 2-3: usbfs: usb_submit_urb returned -110 [ 1658.310777] [3163]: VMCI: IOCTL_VMCI_QUEUEPAIR_DETACH (cid=1522210225,result=3). [ 1658.392018] NET: Unregistered protocol family 39 [ 1666.546438] /dev/vmnet: open called by PID 3163 (vmx-vcpu-0) [ 1666.546450] /dev/vmnet: port on hub 8 successfully opened [ 1666.546462] /dev/vmnet: open called by PID 3163 (vmx-vcpu-0) [ 1666.546467] /dev/vmnet: port on hub 8 successfully opened [ 1671.431383] uvcvideo: Found UVC 1.00 device USB2.0 Camera (1871:0101) [ 1671.432533] input: USB2.0 Camera as /devices/pci0000:00/0000:00:12.2/usb1/1-1/1-1:1.0/input/input13 I have tried uninstalling, and installing manually from the device manager update driver while it's still has the warning sign.. it doesn't see the drivers as valid. No idea how to fix this.. would prefer to not have to go to another computer. I'm not trying to do anything but get the pictures off of it. I have to restart ubuntu, plug in device, for ubuntu to see it correctly again. I am like a month and a half old linux newbie so I have no idea the commands I could use for this, and I don't have a memory card in the phone to mount.

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• Looking for an actual experience of RAID 5 2 drive failure?

  - by Brian

  I'm wondering if anyone has any personal experience of RAID 5 2 drive failure with large drives? As I understand it, the theory is that with large 1-2TB drives, if one drive fails in the raid set, it needs to rebuild everything so is thus hitting all the other drives very hard, and the chance of another failure goes up, especially if the drives were from the same manufacturing batch. And if you lose another drive, you lose all the data. This is usually explained after the statement "RAID is not backup" which I agree with. The theory of this makes sense, and I understand it, but does it really happen?

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• Announcing the Drive Installation Scope

  Announcing the Drive Installation Scope On September 12, Google Drive released a new feature of great interest to many Drive web app developers: the installation scope. In this session we'll discuss the benefits of the installation scope, walk through the related documentation, and do a brief demo of how it works. From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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• Can't mount cd/dvd r/w drive in Ubuntu 12.04

  - by niggles

  I'm pretty new to Ubuntu and I'm having some troubles mounting my drive or getting it to detect media. When I do this: dmesg | grep "sr0" I get : [ 2.096797] sr0: scsi3-mmc drive: 24x/24x writer dvd-ram cd/rw xa/form2 cdda tray [ 2.096968] sr 5:0:0:0: Attached scsi CD-ROM sr0 when I: sudo mount /dev/sr0 /mnt/cdrom mount: no medium found on /dev/sr0 sudo mount /dev/cdrom /media/cdrom mount: no medium found on /dev/sr0 There is most certainly media in the drive. Can someone please help me understand how I can resolve this issue?

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• Forgot to unmount/eject external hard drive, lost moved files. Mac OS X

  - by balupton

  So I was using my Mac with my external hard drive connected via USB. I moved about 10 GB of data to it (via drag and drop while holding down the Command key to move the files rather than to copy them). They moved to the drive all right, but as I was having some issues and the Finder crashed after the transfer, I was unable to eject the volume and later everything froze so I had to do a hard restart (hold the power button). When I remounted the volume (plugged the external hard drive back in) it no longer had any of the files which I moved onto it. As it was a lot of data, how can I recover these files?

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• Mounting Wubi part from another Linux installation

  - by FrankSus

  hope someone can help. I need to access 11.04 ubuntu files residing on a second hard drive (dual boot XP/Ubuntu) from a 10.04 hard drive installation. The 11.04 system co-exists with XP on the second drive. This drive is HPFS/NTFS. My 10.04 installation mounts and displays the contents of the XP installation and all files but the 11.04 system is nowhere to be seen. How can I see and access the Ubuntu partition, please?

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• How to mount drive in /media/userName/ like nautilus do using udisks

  - by Bsienn

  As of my current installation of Ubuntu 13.10 Unity, when i click on a drive in nautilus it get mounted in /media/username/mountedDrive i read that nautilus use udisks to do that. Basically i want to auto mount my drive using udisks in start up using this method But problem is, it mounts the drive in /media/mountedDrive, but i want it the way nautilus do in /media/username/mounteDrive I want NTFS Data drive to be auto mounted at /media/bsienn/ bsienn@bsienn-desktop:~$ blkid /dev/sda1: LABEL="System Reserved" UUID="8230744030743D6B" TYPE="ntfs" /dev/sda2: LABEL="Windows 7" UUID="60100EA5100E81F0" TYPE="ntfs" /dev/sda3: LABEL="Data" UUID="882C04092C03F14C" TYPE="ntfs" /dev/sda5: UUID="8768800f-59e1-41a2-9092-c0a8cb60dabf" TYPE="swap" /dev/sda6: LABEL="Ubuntu Drive" UUID="13ea474a-fb27-4c91-bae7-c45690f88954" TYPE="ext4" /dev/sda7: UUID="69c22e73-9f64-4b48-b854-7b121642cd5d" TYPE="ext4" bsienn@bsienn-desktop:~$ sudo fdisk -l Disk /dev/sda: 160.0 GB, 160000000000 bytes 255 heads, 63 sectors/track, 19452 cylinders, total 312500000 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x8d528d52 Device Boot Start End Blocks Id System /dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT /dev/sda2 206848 117730069 58761611 7 HPFS/NTFS/exFAT /dev/sda3 158690072 312494116 76902022+ 7 HPFS/NTFS/exFAT /dev/sda4 117731326 158689279 20478977 5 Extended /dev/sda5 137263104 141260799 1998848 82 Linux swap / Solaris /dev/sda6 141262848 158689279 8713216 83 Linux /dev/sda7 117731328 137263103 9765888 83 Linux Partition table entries are not in disk order bsienn@bsienn-desktop:~$ cat /etc/fstab # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/sda7 during installation UUID=69c22e73-9f64-4b48-b854-7b121642cd5d / ext4 errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=8768800f-59e1-41a2-9092-c0a8cb60dabf none swap sw 0 0 Desired effect: Picture link

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• cannot boot ubuntu 13.10 with my usb, Can i change the kernal on my laptop to run it?

  - by Carlos Dunick

  Currently i am running 12.04 and looking for an upgrade to 13.10 I first tried a bootable 64bit usb and failed. With the message saying "Kernal requires an x86-64 CPU but only detected an I686 CPU Unable to boot please use a kernal appropriate for your CPU" then tried 32bit and same message came up. Is this due to my laptop simply being to slow? or can/should i change the kernal somehow? Acer Aspire 5710z Intel Pentium dual core processor, 1.73Ghz, 533 MHz FSB, 1 MB L2 cache. 2GB DDR2 lspci 00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03) 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03) 00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 02) 00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 1 (rev 02) 00:1c.2 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 3 (rev 02) 00:1c.3 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express Port 4 (rev 02) 00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 02) 00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 02) 00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 02) 00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 02) 00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2) 00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 02) 00:1f.2 SATA controller: Intel Corporation 82801GBM/GHM (ICH7-M Family) SATA Controller [AHCI mode] (rev 02) 00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 02) 04:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5787M Gigabit Ethernet PCI Express (rev 02) 05:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN (rev 01) 06:00.0 FLASH memory: ENE Technology Inc ENE PCI Memory Stick Card Reader Controller 06:00.1 SD Host controller: ENE Technology Inc ENE PCI SmartMedia / xD Card Reader Controller 06:00.2 FLASH memory: ENE Technology Inc Memory Stick Card Reader Controller 06:00.3 FLASH memory: ENE Technology Inc ENE PCI Secure Digital / MMC Card Reader Controller

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• How to set up a mail server on Linux only for sending admin/debug emails?

  - by ChocoDeveloper

  I need to send server reports to myself from my remote servers, and I don't mind them going to spam, so I don't need SPF, DKIM, etc. I tried using mailutils to send something like this: uptime | mail -s "uptime" [email protected], but the emails don't go through. In /var/mail/root I received a message saying the HELO was invalid. So then I tried also adding -r root@my-ip, and now I don't get any error messages but I don't receive the email either. How can I do this?

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• Why does my drive show as 180GB used, but copies only 40GB?

  - by Manuel

  My computer crashed, so I removed the drive (with Windows XP Professional 32-Bit) and put this drive in another computer running Windows 7 64-bit. Booting with Win7, when going to My Computer it is showing the XP drive as more than 180GB used. So as a quick backup, I'm trying to copy all the disk's content to a folder, but when I start copying, it's showing only 40 GB as the total size of the files to copy. I enabled showing system and hidden files in View options. What could be the problem?

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• How to install a new CA certificate on Linux?

  - by Dail

  I have bought a cheap SSL certificate to run my website using NGINX. They sent me 4 .crt files: www_mywebsite_it.crt AddTrustExternalCARoot.crt PositiveSSLCA.crt UTNAddTrustServerCA.crt I have configurate www_mywebsite_it.crt and my .key on NGinx, but I also have to install the others .crt files. How can I do it? I'm using Ubuntu. (The problem is that I see correctly the SSL certificate using Firefox, Chrome and Opera but if I use Firefox 4.0.1 (the last) I get the default Firefox alert for insecure website.) Thank you!

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• Auto mount USB drive with permissions for all users

  - by oneaustin

  I have an Ubuntu 14.04 based Media Center and I store the media files on a USB HDD. I add files to drive directly on a Mac so I have it formatted as FAT32. The problem is that after reconnecting the drive to the Ubuntu, it mounts at /media/user/drivename and only the root user is allowed access. I need several applications to have full access to this drive. I can change file permissions in the terminal but it doesn't change because of the /media/user location. I am able to manually sudo mount /dev/sdc1 /media/drivename & sudo chmod 777 /media/drivename but the mount point changes each time. Is there a way to make this drive always mount where root and other applications have access?

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• What processes would make the selling of a hard drive that previously held sensitive data justifiable? [closed]

  - by user12583188

  Possible Duplicate: Securely erasing all data from a hard drive In my personal collection are an increasing number of relatively new drives, only put on the shelf due to upgrades; in the past I have never sold hard drives with used machines for fear of having the encrypted password databases that have been stored on them compromised, but as their numbers increase I find myself more tempted to do so (due to the $$$ I know they're worth on the used market). What tools then exist to make the recovery of data from said drives difficult to the extent that selling them could be justified? Another way of saying this would be: what tools/method exist for making the attempts at recovery of any data previously stored on a certain drive impractical? I assume that it is always possible to recover data from a drive that is in working order. I assume also there are some methods for preventing recovery of data due a program called dban, and one particular feature in macOSX that deals with permanently deleting data from a disk.

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• What power cord does a WD16001032 hard drive use?

  - by llcf

  I have a Western Digital 160GB My Book USB external hard drive (WD16001032), but I can't find its power cord (or, at least, figure out which one it is in my box of cords). It might be that only one power cord would fit, but I'm a bit cautious since I just tried one of the cords with a router and could smell electronics burning when I used an incorrect one. What voltage/amps are needed for this drive? I can't find specs on Western Digital's site. I'm assuming this is due to it being an older drive.

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• Google Drive SDK: Sharing files and managing permissions

  Google Drive SDK: Sharing files and managing permissions During this session we'll explain how to use the Google Drive SDK to manage permissions and sharing settings of files. We'll go through the various permission types, roles and values and show to easily embed the Google Drive sharing dialog in your app. From: GoogleDevelopers Views: 0 0 ratings Time: 00:00 More in Science & Technology

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• How to remove permanent map of a network drive on OS X Lion?

  - by Flijfi

  Some time ago I mapped a network drive on my Snow Leopard Mac, which was upgraded to Lion. The network drive is not active any more and I receive popups all the time with the error: There was a problem connecting to the server XXXX. I have no idea how I configured at the time. I may have included a mount command, in a config file but I don't know any more where I did it. I reviewed the Preferences/Account/Login items and there is no permanent mapping there. OSX is updated as Nov 27,2011 and the issue is not related to the upgrade to Lion itself but to a misconfiguration. Any help will be greatly appreciated. (If you have the opposite problem, here is the link to solve it: Permanently map a network drive on Mac OS X Leopard)

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• Issue with SPI (Serial Port Comm), stuck on ioctl()

  - by stef

  I'm trying to access a SPI sensor using the SPIDEV driver but my code gets stuck on IOCTL. I'm running embedded Linux on the SAM9X5EK (mounting AT91SAM9G25). The device is connected to SPI0. I enabled CONFIG_SPI_SPIDEV and CONFIG_SPI_ATMEL in menuconfig and added the proper code to the BSP file: static struct spi_board_info spidev_board_info[] { { .modalias = "spidev", .max_speed_hz = 1000000, .bus_num = 0, .chips_select = 0, .mode = SPI_MODE_3, }, ... }; spi_register_board_info(spidev_board_info, ARRAY_SIZE(spidev_board_info)); 1MHz is the maximum accepted by the sensor, I tried 500kHz but I get an error during Linux boot (too slow apparently). .bus_num and .chips_select should correct (I also tried all other combinations). SPI_MODE_3 I checked the datasheet for it. I get no error while booting and devices appear correctly as /dev/spidevX.X. I manage to open the file and obtain a valid file descriptor. I'm now trying to access the device with the following code (inspired by examples I found online). #define MY_SPIDEV_DELAY_USECS 100 // #define MY_SPIDEV_SPEED_HZ 1000000 #define MY_SPIDEV_BITS_PER_WORD 8 int spidevReadRegister(int fd, unsigned int num_out_bytes, unsigned char *out_buffer, unsigned int num_in_bytes, unsigned char *in_buffer) { struct spi_ioc_transfer mesg[2] = { {0}, }; uint8_t num_tr = 0; int ret; // Write data mesg[0].tx_buf = (unsigned long)out_buffer; mesg[0].rx_buf = (unsigned long)NULL; mesg[0].len = num_out_bytes; // mesg[0].delay_usecs = MY_SPIDEV_DELAY_USECS, // mesg[0].speed_hz = MY_SPIDEV_SPEED_HZ; mesg[0].bits_per_word = MY_SPIDEV_BITS_PER_WORD; mesg[0].cs_change = 0; num_tr++; // Read data mesg[1].tx_buf = (unsigned long)NULL; mesg[1].rx_buf = (unsigned long)in_buffer; mesg[1].len = num_in_bytes; // mesg[1].delay_usecs = MY_SPIDEV_DELAY_USECS, // mesg[1].speed_hz = MY_SPIDEV_SPEED_HZ; mesg[1].bits_per_word = MY_SPIDEV_BITS_PER_WORD; mesg[1].cs_change = 1; num_tr++; // Do the actual transmission if(num_tr > 0) { ret = ioctl(fd, SPI_IOC_MESSAGE(num_tr), mesg); if(ret == -1) { printf("Error: %d\n", errno); return -1; } } return 0; } Then I'm using this function: #define OPTICAL_SENSOR_ADDR "/dev/spidev0.0" ... int fd; fd = open(OPTICAL_SENSOR_ADDR, O_RDWR); if (fd<=0) { printf("Device not found\n"); exit(1); } uint8_t buffer1[1] = {0x3a}; uint8_t buffer2[1] = {0}; spidevReadRegister(fd, 1, buffer1, 1, buffer2); When I run it, the code get stuck on IOCTL! I did this way because, in order to read a register on the sensor, I need to send a byte with its address in it and then get the answer back without changing CS (however, when I tried using write() and read() functions, while learning, I got the same result, stuck on them). I'm aware that specifying .speed_hz causes a ENOPROTOOPT error on Atmel (I checked spidev.c) so I commented that part. Why does it get stuck? I though it can be as the device is created but it actually doesn't "feel" any hardware. As I wasn't sure if hardware SPI0 corresponded to bus_num 0 or 1, I tried both, but still no success (btw, which one is it?). UPDATE: I managed to have the SPI working! Half of it.. MOSI is transmitting the right data, but CLK doesn't start... any idea?

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• Perl IO modules possibly causing issues in Net::DNS module

  - by Rich

  Hi! I’m porting some software that I wrote for a White Russian OpenWRT system to a new Kamikaze 8.09.1 OpenWRT system but I am having some serious issues that I’m hoping you can help me with. Old system Linux kernel 2.4.34 MIPSEL arch Perl 5.8.7 Net::DNS 0.48 IO 1.21 IO::Socket 1.28 IO::Socket::INET 1.28 New system Linux kernel 2.6.26.8 MIPS arch Perl 5.10.0 Net::DNS 0.66 IO 1.23_01 IO::Socket 1.30_01 IO::Socket::INET 1.31 First, let me provide some background information… I am trying to resolve my server (clearprobe.winbeam.com) from within my Perl program and see the following if I enable debugging in Net::DNS: resolve: Server 'clearprobe-ddns.winbeam.com' ;; query(clearprobe-ddns.winbeam.com) ;; setting up an AF_INET() family type UDP socket ;; send_udp(192.168.88.1:53) ;; send_udp(4.2.2.2:53) ;; send_udp(192.168.88.1:53) ;; send_udp(4.2.2.2:53) resolve: res->errorstring: query timed out Both of these servers resolve clearprobe.winbeam.com fine from the command line: root@cwb-2-11:~# echo “nameserver 192.168.88.1” > /etc/resolv.conf root@cwb-2-11:~# nslookup clearprobe-ddns.winbeam.com Server: 192.168.88.1 Address 1: 192.168.88.1 router Name: clearprobe-ddns.winbeam.com Address 1: 64.13.48.40 64-13-48-40.war.clearwire-dns.net root@cwb-2-11:~# echo “nameserver 4.2.2.2” > /etc/resolv.conf root@cwb-2-11:~# nslookup clearprobe-ddns.winbeam.com Server: 4.2.2.2 Address 1: 4.2.2.2 vnsc-bak.sys.gtei.net Name: clearprobe-ddns.winbeam.com Address 1: 64.13.48.40 64-13-48-40.war.clearwire-dns.net Using Perl’s call to the C gethostbyaddr() function works fine, but I need to do another lookup later in the software which requires that I specify the nameserver (clearprobe-ddns.winbeam.com is the authority for my internal DNS zone), hence my Net::DNS requirement. Now, here is the IO module-specific information: What I am seeing is that the reply is coming back from the nameserver (confirmed via tcpdump – I can send the captures if you’d like), but the UDP packets are sitting in the process’s UDP receive queue pending reception by Net::DNS (the approx 1752 bytes per response stay queued waiting for $sel-can_read()): root@cwb-2-11:~# netstat -una Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State udp 1752 0 0.0.0.0:52680 0.0.0.0:* root@cwb-2-11:~# netstat -una Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State udp 5256 0 0.0.0.0:52680 0.0.0.0:* If I force $sock[AF_INET]-recv($buf, $self-_packetsz) around line 803 of /usr/lib/perl5/5.10/Net/DNS/Resolver/Base.pm, instead of waiting for IO::Select’s can_read() function ( @ready = $sel-can_read($timeout)) to populate @ready, the response is received and processed. Any idea what could be causing this issue? In a possibly related matter, I noticed in another script that the following code fails in the same manner (network responses stay in the process’s TCP receive queue) with the new system: $sock = new IO::Socket::INET( PeerAddr => "$server", PeerPort => 37, Proto => 'tcp', Timeout => 5 ); Whereas the following code works: $sock = new IO::Socket::INET( PeerAddr => "$server", PeerPort => 37, Proto => 'tcp' ); I have looked through the NET::DNS code and don’t see a timeout passed for the UDP sockets, so I am not sure if that this is related or not. Please let me know if I can provide you with any further information in order to help diagnose this issue. Thanks! -Rich

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• Linux / C++: Get Internet IP Address (not local computer's IP)

  - by Levo

  How can I programmatically get the Internet IP address? 1) If the computer is directly connected to the Internet using a USB modem. 2) If the computer is connected to the internet via another computer or a modem/router. I there a way to do both? P.S. This link gives exactly the Internet IP, but how can I use it in my program?

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• [Linux] Incremental search on command line?

  - by florianbw

  I'd like to write small scripts which feature incremental search (find-as-you-type) on the command line. Use case: I have my mobile phone connected via USB, Using gammu --sendsms TEXT I can write text messages. I have the phonebook as CSV, and want to search-as-i-type on that. What's the easiest/best way to do it? It might be in bash/zsh/perl/python or any other scripting language. Thanks!

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