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• How to install Grub2 under several common scenarios

  - by Huckle

  I feel the community has long needed a clean guide on how to install Grub2 under a a few extremely common scenarios. I will accept answer as solved when it has one section per scenario and assumes nothing other than what is specified. Please add to the existing answer, wiki style, keeping to the original assumptions. Rules: 1. You cannot, at any point in the answer, invoke Ubiquity (the Ubuntu installer). 2. I strongly recommend not using any automatic boor-repair tools as they're not very educational Scenario 1: Non-booting Linux OS, No boot partition, Fix from Live CD Setup: /dev/sda1 is formatted ext* /dev/sda2 is formatted linux_swap /dev/sda1 doesn't boot because MBR is scrambled and /boot/* was erased Explain: How to boot to a Live CD / USB and restore Grub2 to the MBR and /boot of /dev/sda1 Scenario 2: Non-booting Linux OS, Boot partition, Fix from Live CD Setup: /dev/sda1 is formatted fat /dev/sda2 is formatted ext* /dev/sda3 is formatted linux_swap /dev/sda2 doesn't boot because the MBR is scrambled and /dev/sda1 was formatted Explain: How to boot to a Live CD / USB and restore Grub2 to the MBR and /dev/sda1 and then update the fstab on /dev/sda2 Scenario 3: Install on to thumb drive, Booting various OSes, From Linux OS Setup: /dev/sdb is removable media /dev/sdb1 is formatted fat /dev/sdb2 is formatted ext* /dev/sdb3 is formatted fat The MBR of /dev/sdb is otherwise not initialized You are executing from a Linux based OS installed on /dev/sda Explain: How to install Grub2 on to /dev/sdb1, mark /dev/sdb1 active, be able to chose between /dev/sdb2 and /dev/sdb3 on boot. Scenario 4: (Bonus) Install on to thumb drive, Booting ISO, From Linux OS Setup: /dev/sdb is removable media /dev/sdb1 is formatted fat /dev/sdb1 contains /iso/live.iso /dev/sdb2 is formatted ext* /dev/sdb3 is formatted fat The MBR of /dev/sdb is otherwise not initialized You are executing from a Linux based OS installed on /dev/sda Explain: How to install Grub2 on to /dev/sdb1, mark /dev/sdb1 active, be able to chose between /dev/sdb2, /dev/sdb3, and /iso/live.iso on boot.

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• How do I get a CardScan 60 II working with SANE?

  - by TiuTalk

  I have a CardScan 60 II device and installed SANE in my Ubuntu 10.10 laptop. The problem is I can't make scanimage find the device. Quote: $ sudo sane-find-scanner # sane-find-scanner will now attempt to detect your scanner. If the # result is different from what you expected, first make sure your # scanner is powered up and properly connected to your computer. # No SCSI scanners found. If you expected something different, make sure that # you have loaded a kernel SCSI driver for your SCSI adapter. found USB scanner (vendor=0x08f0 [Corex Technologies Corporation], product=0x1000 [Corex CardScan 60], chip=LM9832/3) at libusb:006:002 # Your USB scanner was (probably) detected. It may or may not be supported by # SANE. Try scanimage -L and read the backend's manpage. # Not checking for parallel port scanners. # Most Scanners connected to the parallel port or other proprietary ports # can't be detected by this program. But I can't find the device: $ sudo scanimage -L No scanners were identified. If you were expecting something different, check that the scanner is plugged in, turned on and detected by the sane-find-scanner tool (if appropriate). Please read the documentation which came with this software (README, FAQ, manpages).

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• Pen drive cannot be mounted

  - by DUKE

  I get the following message when I insert my pen drive to USB port. I am unable to format it as well. (This pen drive earlier used as a bootable drive for Ubuntu 12.04) I am using Ubuntu 12.04 LTS. lsusb command in the terminal gives the following message: siva@siva:~$ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 002: ID 0424:2513 Standard Microsystems Corp. Bus 002 Device 002: ID 0424:2513 Standard Microsystems Corp. Bus 001 Device 003: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth) Bus 001 Device 004: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory Bus 002 Device 003: ID 05ac:8242 Apple, Inc. IR Receiver [built-in] Bus 002 Device 004: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse Bus 001 Device 007: ID 05ac:8281 Apple, Inc. Bus 001 Device 008: ID 0951:1653 Kingston Technology

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• Ubuntu installation on Windows , I can't find my way back.

  - by Poofs

  So recently I have installed Ubuntu as an OS in addition to my Windows because it looked good and I have used it in the past and I liked it. Before I installed Ubuntu, they (the website) have given me a help list that shows that I will have the option of having Windows aside to Ubuntu (dual install), while I work with the Ubuntu OS. They told me that if I either put it in a CD or USB drive, I'll be okay. So there I was, installing Ubuntu, saving the Ubuntu file on my USB drive first, then afterwards clicking it and therefore proceeded to install. The problem is once I installed Ubuntu, it directed me to the 'login' page without giving me an option for dual-installing (you know, the language portion and so on). Now I tried both to suspend and shut off, and it seems like I cannot access my Windows files/account anymore and it really is unfortunate. Now I am FREAKING out, because this is a shared computer that my family uses (it's like a main computer in the house) and everyone's files are on this. It is extremely crucial for me to get these Windows files back because if I don't, my life will end tonight. Please, if someone can help me, I will love you forever. Please just help me, this is urgent. I'm sure a lot of people have experienced this too, but I have found nothing on the website helpful for me as Ubuntu is a very new thing for me. Thanks everyone! :)

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• no way to use opendns on pppoe connection?

  - by magisterludi

  I have an old speedtouch usb modem (revision 0) and on my desktop with xubuntu 12.04 I've configured a pppoe connection. I can connect and my ISP assign an IP address and the DNS but the primary DNS address is not reachable by ping, the secondary yes but no address is resolved then I can't surf the web. Then I want to set the open DNS but there is bo way, if I change manually /etc/resolv.conf it is rewrited by some script (there is the flag usepeerdns on the configuration script, if I exclude it there is no way to assign any DNS server because resolv.conf is not read) also if I set not writable the file changing the default permission. I changed dhclient.conf with the code prepend domain-name-servers 208.67.222.222,208.67.220.220; and now if I connect by a wifi connection to my router I'm using openDNS server but ppp does not use this script as long as I can see and the DNS server is always setted by my ISP. How can I use set DNS manually to a PPP connection? Is there any way to change it after the connection? Why NetworkManager is not able to manage my dsl connection, it seems not able to manage the dsl usb cable modem. If I use pppoeconf NetworkManager doesn't start and I have to manually delete the lines added to /etc/network/interfaces because the system is not able to start with full configuration of network If I connect a modem-router to the same line I can surf with the DNS server assigned by my ISP, I can't figure why. Some suggestion? Thanks to all

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• Problem with SANE and CardScan

  - by TiuTalk

  I have a CardScan 60 II device and installed SANE in my Ubuntu 10.10 laptop. The problem is I can't make scanimage find the device. Quote: $ sudo sane-find-scanner # sane-find-scanner will now attempt to detect your scanner. If the # result is different from what you expected, first make sure your # scanner is powered up and properly connected to your computer. # No SCSI scanners found. If you expected something different, make sure that # you have loaded a kernel SCSI driver for your SCSI adapter. found USB scanner (vendor=0x08f0 [Corex Technologies Corporation], product=0x1000 [Corex CardScan 60], chip=LM9832/3) at libusb:006:002 # Your USB scanner was (probably) detected. It may or may not be supported by # SANE. Try scanimage -L and read the backend's manpage. # Not checking for parallel port scanners. # Most Scanners connected to the parallel port or other proprietary ports # can't be detected by this program. But I can't find the device: $ sudo scanimage -L No scanners were identified. If you were expecting something different, check that the scanner is plugged in, turned on and detected by the sane-find-scanner tool (if appropriate). Please read the documentation which came with this software (README, FAQ, manpages).

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• Galaxy Note II MTP on Ubuntu 12.04

  - by Anass Ahmed

  I bought a branding new Galaxy Note II and I tried to mount its storage to my ubuntu laptop. As you know, Android 4.0+ uses MTP by default. Android 4.1 doesn't support USB Mass Storage anymore! So I have to use MTP to open my files via USB. I followed this article to get it work. It worked only for External Memory Card. but the internal cannot be reached! $mount /dev/sda3 on / type ext4 (rw) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) /dev/sda5 on /media/Islamics type fuseblk (rw,noexec,nosuid,nodev,allow_other,blksize=4096) /dev/sda8 on /media/Technology type fuseblk (rw,noexec,nosuid,nodev,allow_other,blksize=4096) /dev/sda7 on /media/Misc type fuseblk (rw,noexec,nosuid,nodev,allow_other,blksize=4096) binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev) gvfs-fuse-daemon on /home/anass/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev,user=anass) gvfs-fuse-daemon on /root/.gvfs type fuse.gvfs-fuse-daemon (rw,nosuid,nodev) mtpfs on /media/GalaxyNote2 type fuse.mtpfs (rw,nosuid,nodev,allow_other,user=anass)

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• Input/output error, when trying to install on netbook [closed]

  - by Ben

  Been trying to install ubuntu on my Samsung NB30 netbook, but I have been running into the same error over and over again. [Errno 5] Input/output error This particular error is often due to a faulty CD/DVD disk or drive, or a faulty hard disk. It may help to clean the CD/DVD, to burn the CD/DVD at a lower speed, to clean the CD/DVD drive lens (cleaning kits are often available from electronics suppliers), to check whether the hard disk is old and in need of replacement, or to move the system to a cooler environment. I'm installing from the USB bootable version, I get the exact same error at the exact same point when trying to install both ubuntu desktop and ubuntu desktop remix. I've tried redownloading both ISOs twice and I've tried two different USB sticks (one being completely new). I've tried installing from with in an ubuntu live session and I get the exact same problem. I've ran a bootable memtest and everything passes with no errors, I've also ran a dmesg in terminal after the installer fails here's what it reported - http://bit.ly/exAQRR Thanks in advance! EDIT: I know this was ages ago, but to anyone out there with the same issue, the problem turned out to be the downloaded image, my internet is poor at the best of times and the ISO failed the MD5sum check, if this happens to you I recommend you download the ISO image by torrent, it'll check the integrity of the file is maintained.

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• Using 12.04 installation as a persistent pen drive

  - by Cawas

  Disclaimer: I aim to build a self contained pen drive with my application inside, so no matter about updates. Maybe I'm looking at the wrong linux distribution to do this... Please let me know if you think so. I've tried knoppix and even lubuntu, but they don't come with enough "drivers" for Unity3D to work. Creating a custom live persistent pen drive is a real pain and I'm trying for 1 day without any success. Sure, being able to do it would probably be ideal and occupy the minimum space. Using the installation image on a pen drive, however, is good enough and is really easy to create. We can even do it from any OS, using UNetBootin, LiLi USB Creator or some other methods. Straight forward. Some recommend installing it on a pen drive. But that requires a lot of space and, I believe, it won't behave as good as something meant to be installed on a usb disk, because of memory management. So, there are only a few negative points on using the installation image that I can think of. Question here, is how to remove those drawbacks: Having to press "Try Ubuntu". That's the big one. Couldn't find how. Unable to load everything on memory and keep on running without the pen drive (like this) Unable to remove "Install Ubuntu 12.04 LTS" app. Setting the ISO to use maximum amount of space for the OS will leave pen drive with zero space left and any file saved within it from ubuntu is inaccessible from the outside (when plugin the pen drive and not booting from it). Am I missing something? Can those points be fixed?

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• 11.10 liveCD black screen

  - by Shaun Killingbeck

  Attempting to install/try ubuntu 11.10 on my new laptop, using a liveCD (and tried USB). I get the purple screen (with the man/keyboard at the bottom) and after that the screen flashes bright white before going black. Ubuntu continues to load in the background, with login sound etc but the screen is off. I have tried as many different solutions as I could find including: using nomodestep, xforcevesa, i915.modeset=0 in boot options (seperately): varying consequences, but either I end up at a blinking cursor with no prompt, a command line (startx fails: no screen found), or the original blank screen again Tried booting from VirtualBox - it crashes at the same place the screen would go blank when using a CD/USB tried 11.04: I don't have this problem BUT when trying to install, I get a ubi-partman error 141 (possibly down to the three partitions that came on my laptop... not sure why HP needed there own separate partition for HP Tools...) Model: HP Pavillion DV6 6B08SA Processor: AMD Quad-Core A6-3410MX APU with Radeon HD 6545G2 Dual Graphics (1.6 GHZ 4 MB L2 cache ) Chipset: AMD RS880M Any help would be greatly appreciated. I just want to be able to partition the drive and install Ubuntu. I'm assuming the issue is graphics card related, although I have no confirmation of that. I have caught a glimpse of some output to do with pulseaudio and [fail], but I can't imagine why that would cause a screen problem and the sound definitely works anyway.

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• Unable to mount USBDRIVE Error creating moint point: Permission denied

  - by steve

  Whenever I plug a usb into my computer a window pops up and says Unable to mount [Name of USB] Error creating moint point: Permission denied steve@goliath:/$ uname -a Linux goliath 3.2.0-32-generic #51-Ubuntu SMP Wed Sep 26 21:33:09 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux steve@goliath:/$ sudo fdisk -l WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 120.0 GB, 120034123776 bytes 255 heads, 63 sectors/track, 14593 cylinders, total 234441648 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: 0x0f716ee1 Device Boot Start End Blocks Id System /dev/sda1 1 234441647 117220823+ ee GPT WARNING: GPT (GUID Partition Table) detected on '/dev/sdb'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sdb: 1500.3 GB, 1500301910016 bytes 255 heads, 63 sectors/track, 182401 cylinders, total 2930277168 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: 0x0f710ee1 Device Boot Start End Blocks Id System /dev/sdb1 1 2930277167 1465138583+ ee GPT Disk /dev/sdc: 16.0 GB, 16005464064 bytes 74 heads, 10 sectors/track, 42244 cylinders, total 31260672 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: 0xc3072e18 Device Boot Start End Blocks Id System /dev/sdc1 8064 31260671 15626304 c W95 FAT32 (LBA) steve@goliath:/$ sudo mkdir /media/external mkdir: cannot create directory `/media/external': Permission denied steve@goliath:/$ sudo mkdir /media/usb0 mkdir: cannot create directory `/media/usb0': Permission denied steve@goliath:/$ sudo ls -l / | grep media drwxr-xr-x 3 root root 4096 Oct 3 22:48 media steve@goliath:/$ ls /media/ -a . .. MediaShare MediaShare is the the directory on my server that has all my movies and music. If there is any information I left out please let me know.

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• Why can't I boot from portable HD?

  - by user11239

  I've been trying to get Ubuntu 10.04-LTS 32-bit desktop installed onto a 250GB FreeAgent Go drive from Seagate. I've been able to install onto a USB flash drive and boot successfully from this. I have installed Ubuntu onto the jump drive using Universal USB Installer, and this was a total success in terms of getting Ubuntu to run off a flash drive. I was unable to accomplish this with the portable HDD. I then, following instructions, attempted to install the OS onto the HDD once booted up from the flash drive. After installing the OS on the HDD, the computer would simply not load the OS when the HDD medium was selected for booting from. However, as there is no System-> Preferences-> Removable Drives and Media I could not complete this step. Is this vital? How do I do this under Ubuntu 10.04? I have formmated the MBR on the HDD and repeated the above, still with no success. I have also browsed some forums that mention there may be something related to spin-up speeds, but nothing explained in detail the issue or how to solve it, and I'm not familiar enough with system booting to understand if this could be an issue. Basically, what I'm trying to do is get Ubuntu to boot off the HDD, I've attempted several things, and the result is, after selecting the HDD from BIOS, the OS never starts booting (after waiting upwards of ten minutes). I just have a white cursor blinking. I can always get it to boot from the jump drive. Related question

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• Ubuntu 14.04 install fails with Via S3 UniChrome Pro graphics

  - by WizardNo.7

  I am trying to install Ubuntu 14.04 on a Fujitsu Siemens Amilo Pro laptop(it's quite old yes, has about 30GB Hard Drive and I think 192mb of RAM) which currently has Windows XP installed (which I'd like to keep for the time being). I have downloaded the 32-bit Desktop ISO and used unetbootin to create a Live USB for this laptop. When I boot from USB, I arrive at the unetbootin Grey and Blue menu and pick either "Try Ubuntu without installing", or "Install Ubuntu". The menu goes away and an Ubuntu loadscreen showing UBUNTU and four dots which progressively change between white and orange. At about the second color changing cycle a white underscore symbol appears next to the fourth dot and flickers. There is some leftover text from the kernel boot still visible, but there is no graphical desktop. After this I have to hard reboot or shut-down. $ lshw -c video *-display UNCLAIMED description: VGA compatible controller product: CN700/P4M800 Pro/P4M800 CE/VN800 Graphics [S3 UniChrome Pro] Vendor: VIA Technologies, Inc. physical id: 0 bus info: pci@0000:01:00.0 version: 01 width: 32 bits clock: 66MHz capabilities: pm agp agp-2.0 vga_controller bus_master cap_list configuration: latency=64 mingnt=2 resources: memory:f0000000-f3ffffff memory:d1000000-d1ffffff

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• UBUNTU's Network Connection Manger can't detect Huawei ETS2051 Modem device!

  - by Doctoa

  I have a modem device called Huawei ETS2051 and the Network Connection Manger can't detect it, but when I use Gnome-PPP it work fine but the problem is when I use Gnome-PPP; apps like Ubuntu software Center Can't reconice that's Iam connecting to the Internet so the app is just act like it's offline while other apps like web browsers and IM's work good under Gnome-PPP. any way what I want is to have a Full Ubuntu experince by making The Network Connection Manger detect my ETS2051. I have another 3G USB modem and The Network Connection Manger detect it and it's work just fine but the internet price for this one is high and I can't effort it so am count on that ETS2051 modem as you can see for it's low price and stable internet speed that satesfy my needs. More information: Gnome-PPP is a GUI for wvdial. the ETS2051 modem use a serial USB port. I have a Windows driver CD for the device. I have also find This qustion about the software Center acting like it's offline around wvdial and there's this launchpad bug. and am really insest to use Ubuntu Software Center so please no other software manger apps recomendation... I've also this Genius ColorPage HR6X Slim scanner that's Ubuntu can't detect it, so if you interset you can check and answer the qustion from here...

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• b43 Firmware Error when trying to install Ubuuntu 14.04 on XP Laptop

  - by WizardNo.7

  I know I'm an Ubuntu and Linux n00b, but I've been browsing the web for a few days searching for a solution, and none of the other b43 posts etc solve my problem. I am trying to install Ubuntu 14.04 on a Fujitsu Siemens Amilo Pro laptop(It's quite old yes, has about 30GB Hard Drive and I think 192mb of RAM) which currently has Windows XP installed(which I'd like to keep for the time being). I have downloaded the 32-bit Desktop ISO and used unetbootin to create a Live USB for this laptop. When I boot from USB, I arrive at the unetbootin Grey and Blue menu and pick either "Try Ubuntu without installing", or "Install Ubuntu". The menu goes away and an Ubuntu loadscreen showing UBUNTU and four dots which progressively change between white and orange. At about the second color changing cycle a white underscore symbol appears next to the fourth dot and flickers, and then I get the usual: [ 95.514833] b43-phy0 ERROR: Firmware file "b43/ucode5.fw" not found [ 95.514847] b43-phy0 ERROR: Firmware file "b43-open/ucode5.fw" not found [ 95.514855] b43-phy0 ERROR: You must go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the correct firmware for this driver version. Please carefully read all the instruction on this website. After this I have to hard reboot or shut-down. I don't have a previous Linux install so cannot do the apt-get from my previous install. I cannot access the boot options menu by using F6 or similar. Any ideas? Thanks beforehand!

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• Getting error - This application has failed to start because the application configuration is incorrect. Reinsta

  - by Kaye

  I am sorry if I am repeating this issue. But I am a layman and cant understand the answers posted. I want to do away with Windows XP Professional (I have lost the product key) that I have on an old desktop PC that is more than 7/8 years old. I didnt use the PC for a couple of years as this laptop was more convenient. Now I have started to use this PC but cannot download SP2 onto the PC as it keeps asking for product key and I dont remember where I wrote it down or where I kept it. So I downloaded Ubuntu 12.10 onto the desktop screen (about 753MB and 3 hours) and then used Unetbootin to put this on my pendrive. After completing the process, I have on my pendrive 9 folders, 3 text files, 1 autorun file, 1 ldlinux file, 1 wubi application file and 5 other files - total 20 items. Though on bootup I opted for USB boot, the boot-up opens into Windows. It simply bypasses the USB where ubuntu lies. What do I do? Am I doing things correctly. Pls explain in simple terms.

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• Installing 11.10 on flash drive failed

  - by lakshitha

  This is my problem. I burned Ubuntu 11.10 iso to a CD. I was able to boot my PC with it. I plugged in my flash drive, and inserted the CD and restarted the computer to boot Ubuntu. I then chose to install Ubuntu alongside with Windows (XP prof.). Then I was able to select my flash drive as the installation location. I prepared partitons by dragging a bar and allocating the size for the Ubuntu installation, and for other files. I set 3GB for ubuntu and 1GB for other files. The pen drive was partitioned and files installed on it. After sucess I ejected the CD to restart the PC to use the new OS. When it restarted I expected to be asked to select an OS to boot. But I could only boot with Windows XP. Properties of my flash drive show its total capacity is 1GB. The partitioned 3GB is missing. How can I boot with the USB stick? How can I get my 4GB USB stick back?

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• Unidentified Connection in Compaq CQ61Windows7 OS on DSL cable network connection

  - by Mohammed Thouseef

  I have Dell studio with shared DSL internet connection my router is "NETGEAR DG834" & Network connection discription is "Broadcom netlink tm gigabit ethernet" this connection is working fine with dell laptop with Vista homepremium OS. My Question is? If i connect HPcompaq presario CQ61 in this connection it will automatically select Public network and display unidentified connection i tried several times but not suceeded its OS is Win7 home premium. but wireless networking is working fine only this problem is faceing with DSL cable connection when i diagnos the connection an error will generate "Local Area Connection does not have a valid IP configuration" in LAN Connection status window i noticed IPV4 & IPV6 Connectivity is showing "No Network Access" please can you clarify whats the problem.

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• Windows with putty via USB serial cable to Linux serial port - output ok, input isn't

  - by Aharon Robbins

  I am trying to get two way serial communications going between a Windows XP system and a Linux system (RHEL 5). I have /sbin/agetty -L 9600 ttyS0 in /etc/inittab. I am using a generic USB to serial adaptor on Windows (Unitek) and a null modem cable. I have putty configured for 9600 baud, 8 bits, no parity, one stop bit, no flow control. I get the login prompt from agetty in the putty window but input does not work; I see weird characters in the putty screen. I can echo output into the device from windows and see it, but cat < /dev/ttyS0 just prints out weird characters from what I type. Any and all suggestions will be welcome. Thanks!

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• eSata plugged into Sata socket via adaptor cable very slow

  - by Jon

  Why would an external eSata Drive (xSonic with 500Gb notebook Hard Drive) run ok on a Silicon Image based PCI-E to eSata adaptor at about 35MB/s, But then run really slow when plugged into NForce4 Sata socket via cable? I have another version of the problem with Really slow 1MB/s!!! performance on a ASUS P5K Pro Motherboard with E8400 CPU. This time the same card is plugged into a PCI-E socket. The same eSata drive is plugged into the Esata port on the card. All this is running on Windows XP Pro 32bit. Any suggestions on how to diagnose the problems??

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• Ultrium 3 tape drive shoe-shining, 3Mb/s: and it's not the cable

  - by mowsala

  I have a HP 960 Ultrium 3 tape drive. Since I got it, (second hand, £90) I've been experiencing shoe-shining. Writing with tar in Linux, I average about 3Mb/s write speed. I've tried replacing both the SCSI card and the cable now, both of which made no difference at all. A curiuos observation I have made is that the write rate is not consistent. Sometimes it will write for over a minute without shoeshining, but more often, just a few seconds. I've also tried several tapes, different source drives, and even writing from Windows Backup, to no avail.

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• Splitting Ethernet cable

  - by Nathan

  I am looking for the best way to network my small business. I have an office where my router/modem are located, and then 2 more computers in another room. I can route Ethernet to this room with about 75 ft of cabling, and I would like to do this because my computers on Ethernet are getting 3x the speed as computers on wireless. Is there any way I can use just one Ethernet cable to span the 75 feet, and then maybe 2 smaller ones to go to the two computers from there? If there's a simple way to do this, maybe with a connector that would be ideal, as opposed to buying over 150 ft of cabling. Thanks!

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• Connecting two pcs through cable, at the same time as wireless

  - by Steffen

  I've got 2 pcs setup with WLAN - however when I copy files between the machines it takes forever (obviously, since I run 801.11g). So I thought, why not just connect them directly with a cable (my wireless router is the other end of the house, that's why I don't use cables to that) However how should I configure the LAN connection on each machine, so I can use it for transferring files between them, whilst using my WLAN to access the Internet ? I was thinking about letting one machine be gateway, but then Windows pops up with a lot of warnings (basically it says this won't work when you're using two disjoint networks) And now I'm at a loss as to what to try.

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• Sharing wireless internet connection between 2 Ubuntu 10.04 systems using cross-over cable

  - by Gary

  I have a Lenovo T60 with Ubuntu 10.04 connected with a cross-over cable to a Dell Vostro 1400, also running Ubuntu 10.04. My internet is coming into the Lenovo through an external wireless antennae, and I want to share the internet with the Dell. On the Lenovo: eth0 connection has IPv4 Settings 'Shared to other computers' I can ping the Dell (10.42.43.10) successfully I can use mtr to trace to www.google.com successfully On the Dell: eth0 connection has IPv4 Settings 'Automatic DHCP' I can ping the Lenovo (10.42.43.1) successfully when I use mtr to trace to www.google.com, I can only reach 10.42.43.1 I must be missing some setting, but cannot see what it is; can anyone help me?

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• Twisted pair cable twists and unwanted signals issue

  - by ziaharipur

  I am confused about one point I have read the following paragraph from the networking book. “the twists in the twisted pair cable are used to avoid the unwanted signals. For example one twist, one wire is closer to the noise source and the other is farther; in the next twist the reverse is true. Twisting makes its probable that both wires are equally affected by the unwanted signal. This means that the receiver which calculate the difference between the two receives no unwanted signal.” Now ok I understood the purpose of twists but I am confused about how receiver will calculate the difference when it will receive the signal?. How unwanted signal will be eliminated ? Another thing that I want to make clear is , I am beginner please provide such an answer that can be understood.

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