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• Hostapd - WLAN as AP

  - by BBK

  I'm trying to start hostapd but without success. I'm using Headless Ubuntu 11.10 oneiric 3.0.0-16-server x86_64. WLAN driver is rt2800usb and my wireless nic card TP-Link TL-WN727N supports AP mode as shows below: us0# ifconfig wlan0 wlan0 Link encap:Ethernet HWaddr 00:27:19:be:cd:b6 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) us0# lsusb Bus 003 Device 003: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070 Wireless Adapter us0# lshw -C network *-network:3 description: Wireless interface physical id: 4 bus info: usb@3:2 logical name: wlan0 serial: 00:27:19:be:cd:b6 capabilities: ethernet physical wireless configuration: broadcast=yes driver=rt2800usb driverversion=3.0.0-16-server firmware=0.29 link=no multicast=yes wireless=IEEE 802.11bgn us0# hostapd /etc/hostapd/hostapd.conf Configuration file: /etc/hostapd/hostapd.conf Could not read interface wlan0 # The int flags: No such device nl80211 driver initialization failed. ELOOP: remaining socket: sock=4 eloop_data=0xd3e4a0 user_data=0xd3ecc0 handler=0x433880 ELOOP: remaining socket: sock=6 eloop_data=0xd411f0 user_data=(nil) handler=0x43cc10 us0# cat /etc/hostapd/hostapd.conf ssid=Home interface=wlan0 # The interface name of the card #driver=rt2800usb driver=nl80211 macaddr_acl=0 ieee80211n=1 channel=1 hw_mode=g auth_algs=1 ignore_broadcast_ssid=0 wpa=2 wpa_passphrase=88888888 wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP rsn_pairwise=CCMP us0# iw list Wiphy phy0 Band 1: Capabilities: 0x172 HT20/HT40 Static SM Power Save RX Greenfield RX HT20 SGI RX HT40 SGI RX STBC 1-stream Max AMSDU length: 7935 bytes No DSSS/CCK HT40 Maximum RX AMPDU length 65535 bytes (exponent: 0x003) Minimum RX AMPDU time spacing: 2 usec (0x04) HT RX MCS rate indexes supported: 0-7, 32 TX unequal modulation not supported HT TX Max spatial streams: 1 HT TX MCS rate indexes supported may differ Frequencies: * 2412 MHz [1] (20.0 dBm) * 2417 MHz [2] (20.0 dBm) * 2422 MHz [3] (20.0 dBm) * 2427 MHz [4] (20.0 dBm) * 2432 MHz [5] (20.0 dBm) * 2437 MHz [6] (20.0 dBm) * 2442 MHz [7] (20.0 dBm) * 2447 MHz [8] (20.0 dBm) * 2452 MHz [9] (20.0 dBm) * 2457 MHz [10] (20.0 dBm) * 2462 MHz [11] (20.0 dBm) * 2467 MHz [12] (20.0 dBm) (passive scanning, no IBSS) * 2472 MHz [13] (20.0 dBm) (passive scanning, no IBSS) * 2484 MHz [14] (20.0 dBm) (passive scanning, no IBSS) Bitrates (non-HT): * 1.0 Mbps * 2.0 Mbps (short preamble supported) * 5.5 Mbps (short preamble supported) * 11.0 Mbps (short preamble supported) * 6.0 Mbps * 9.0 Mbps * 12.0 Mbps * 18.0 Mbps * 24.0 Mbps * 36.0 Mbps * 48.0 Mbps * 54.0 Mbps max # scan SSIDs: 4 Supported interface modes: * IBSS * managed * AP * AP/VLAN * WDS * monitor * mesh point Supported commands: * new_interface * set_interface * new_key * new_beacon * new_station * new_mpath * set_mesh_params * set_bss * authenticate * associate * deauthenticate * disassociate * join_ibss * Unknown command (68) * Unknown command (55) * Unknown command (57) * Unknown command (59) * Unknown command (67) * set_wiphy_netns * Unknown command (65) * Unknown command (66) * connect * disconnect The question is: Why the hostapd not starting?

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• SQL Server PowerShell Provider follows the Version of PowerShell on the Host and other errata

  - by BuckWoody

  There may be some misunderstanding on how the PowerShell Provider for SQL Server works. I’ve written an article or two explaining that you can use PowerShell with SQL Server, without having the SQL Server 2008 (or higher) provider around. After all, PowerShell just uses .NET, and SQL Server “Server Management Objects” or SMO listen to that interface as well. In SQL Server 2008 and higher we created a “MiniShell” for PowerShell that gives you the ability to treat a SQL Server Instance as a drive (called a “Provider” or path or drive) and a few commands (called command-lets). Using these two simple constructs you can move around SQL Server quickly and work with the objects it holds. I read the other day where someone stated that we had “re-compiled” PowerShell, so that you would have version 1.0 from SQL Server and 2.0 on your new server. Not so! Drop to a SQLPS prompt and a PowerShell prompt and type this in each: $PSVersionTable They should return the same value. You can think of a MiniShell as simply a compiled “profile” that gives you those providers and command-lets automatically – that’s all. In fact, you can load the SMO libraries yourself without the SQL Server 2008 Provider anywhere in sight. I do this all the time, since the MiniShell also has other restrictions. Also remember that if you run a PowerShell script as a SQL Agent Job step type (in 2008 and higher) that you’re running under the context of the account that starts Agent – I think most folks know this, but it’s good to keep in mind. There’s a re-written section of Books Online that goes over working with this very nicely – also covers the question “How to I connect to another server using the SQL Server PowerShell Provider” (hint: It’s just CD) and “How do I load all the SMO stuff if I don’t want to use the Provider” and more. Be sure and check out the note at the bottom that explains the firewall exceptions you’ll need to enable to CD to that remote server. Here’s that link: http://msdn.microsoft.com/en-us/library/cc281947.aspx Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• Kernel panic - not syncing: Attempted to kill init!-grub rescue

  - by Nimish

  I have windows8 and ubuntu 13.10 installed on my laptop in dual-boot mode.While updating the disk management system my pc got hanged and on restarting it have grub rescue mode prompting on the screen.I tried ls (hd0,msdos_) all the commands but it shows 'unknown file system".i tried booting with ubuntu,boot-repair,superboot live cd but it shows "Kernel panic - not syncing: Attempted to kill init!" and hangs on the screen with two blinking lights.please suggest some help as soon as possible thanks in advance

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• Create USB installer from the command line?

  - by j-g-faustus

  I'm trying to create a bootable USB image to install Ubuntu on a new computer. I have done this before following the "create USB drive" instructions for Ubuntu desktop, but I don't have an Ubuntu desktop available. How can I do the same using only the command line? Things I've tried: Create bootable USB on Mac OS X following the ubuntu.com "create USB drive" instructions for Mac: Doesn't boot. usb-creator: According to apt-cache search usb-creator and Wikipedia usb-creator only exists as a graphical tool. "Create manually" instructions at help.ubuntu.com: None of the files and directories described (e.g. casper, filesystem.manifest, menu.lst) exist in the ISO image, and I don't know what has replaced them. unetbootin scripting: Requires X server (graphics support) to run, even when fully scripted. (The command sudo unetbootin lang=en method=diskimage isofile=~/ubuntu-10.10-server-amd64.iso installtype=USB targetdrive=/dev/sdg1 autoinstall=yes gives an error message unetbootin: cannot connect to X server.) Update Also tried GRUB fiddling: Merging information from pendrivelinux.com a related question on the Linux Stackexchange and a grub configuration example I was able to get halfway there - it booted from USB, displayed the grub menu and started the installation, but installation did not complete. For reference, this is the closest I got: sudo su # mount USB pen mount /dev/sd[X]1 /media/usb # install GRUB grub-install --force --no-floppy --root-directory=/media/usb /dev/sd[X] # copy ISO image to USB cp ~/ubuntu-10.10-server-amd64.iso /media/usb # mount ISO image, copy existing grub.cfg mount ~/ubuntu-10.10-server-amd64.iso /media/iso/ -o loop cp /media/iso/boot/grub/grub.cfg /media/usb/boot/grub/ I then edited /media/usb/boot/grub.cfg to add an .iso loopback, example grub entry: menuentry "Install Ubuntu Server" { set gfxpayload=keep loopback loop /ubuntu-10.10-server-amd64.iso linux (loop)/install/vmlinuz file=(loop)/preseed/ubuntu-server.seed iso-scan/filename=/ubuntu-10.10-server-amd64.iso quiet -- initrd (loop)/install/initrd.gz } When booting from USB, this would give me the Grub boot menu and start the installer, but the installer gave up after a couple of screens complaining that it couldn't find the CD-ROM drive. (Naturally, as the box I'm installing on doesn't have an optical drive.) I resolved this particular issue by giving up and doing the "create USB drive" routine using the Ubuntu Live desktop CD (on a computer that does have an optical drive), then the USB install works. But I expect that there is some way to do this from the command line of an Ubuntu system without X server and without an optical drive, so the question still stands. Does anyone know how?

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• The Windows 8 and Ubuntu 12.04 Dual Boot NIghtmare

  - by Steve

  I have done some research as to how to go about this dual-boot, and I am close, but I need some guidance with booting into Windows 8 (Ubuntu is installed). I have a Lenovo Ideapad y510p. I will go over what I have done to dual-boot this laptop, with windows 8 pre-installed, with Ubuntu 12.04: I followed every instruction to the letter for the 97-vote response here, and everything worked fine up until after the repair boot section: Installing on a Pre-Installed Windows 8 System (UEFI Supported) I ran into the following error upon restarting after the repair boot section: error: invalid arch independent elf magic. This error (a grub issue) disabled me from booting into Ubuntu :( After a little googling, I followed the instructions in the reactivating grub 2 section to resolve the error: http://kb.acronis.com/content/1686 I found a possible solution to fixing the Windows 8 boot issue, and tried it: http://webcache.googleusercontent.com/search?q=cache:i9JMyXzzRpYJ:askubuntu.com/questions/279275/dual-boot-problem-windows-8-ubuntu-12-04+&cd=1&hl=en&ct=clnk&gl=us&client=ubuntu I thought the above solution worked, but when I attempt to boot into Windows 8, I get the following missing file error: File: \Boot\BCD Status: 0xc000000e Info: The Boot Configuration Data for your PC is missing or contains errors. Here is some other information that may be useful: I have 3 partitions devoted to Ubuntu. The first, sda8, has a flag bios_grub (1049 kb). The second, sda9, is where everything else is (96.6 GB). The last, sda10, is for swap (8299 MB). My question is: How do I fix the boot configuration for Windows 8? Any help would be greatly appreciated :) Update 1: When I attempt to boot into UEFI mode, I get the following error: invalid arch independent elf magic (the same error I saw in step 2). Update 2: A useful link here I found: Dual booting Ubuntu 12.04: UEFI and Legacy So, this is my 4th time installing Ubuntu on the laptop, and it looks like I need to install it in UEFI mode. Should I scrap it all again, and reinstall? Or is there ANY way of salvaging my installation? At this point, I can't even boot into Windows (although I have an installation cd to fix the windows boot issue, that would ultimately screw over ubuntu). Update 3: After doing a little more browsing around, I found a cool way around this messy grub stuff, using rEFInd. Rod Smith's post here saved me! Installing ubuntu 12.04.02 in uefi mode Now, I am able to dual-boot Windows 8 and Ubuntu and boot into both operating systems :) I have another issue (relating to the boot configuration in the bios) that I will post as a separate question :)

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• USB: Missing Operating System - MAC

  - by Viraj Rao

  Have installed Ubuntu 11.10 on USB using Live CD. Followed the steps as provided in below link https://help.ubuntu.com/community/MactelSupportTeam/AppleIntelInstallation After installation is complete in Refit menu, when i click on Linux icon I receive "Missing Operating System" message. I followed the steps provided in the below link from this forum, but am still receiving the same message. Unable to boot: Missing Operating system Any assistance is highly appreciated.

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• Week in Geek: Windows 8 Users at Risk Due to Missing IE 10 Flash Update

  - by Asian Angel

  This week’s edition of WIG is filled with news link goodness covering topics such as Windows 8 Pro downgrades to Windows 7 and Vista will be possible, the Ubuntu Live CD is now dead, Guild Wars 2 is suffering an ongoing password attack, and more. HTG Explains: Is ReadyBoost Worth Using? HTG Explains: What The Windows Event Viewer Is and How You Can Use It HTG Explains: How Windows Uses The Task Scheduler for System Tasks

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• Can anyone explain to me what problem Core Data solves?

  - by Curtis Sumpter

  Core Data seems to add a needless layer of complexity. If you want to save data created natively by the user in an app why not just use an object and then write the data all to SQLite or back to a server using a RESTful script if necessary. Android doesn't have Core Data (though if it has something similar I haven't seen it.). What the heck is the point of buggy CD except useless needless overhead for people who can't write SQL or CGI scripts?

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• Ubuntu 12.04 won't load - hangs at Busybox v1.18.5 / initramfs

  - by Marty

  I want to start by saying that I am very new with Linux (about 1 month using it). I have had no problems up until now. I am running Ubuntu 12.04 from a Toshiba laptop with 250 GB hard drive and 3 GB of ram. Everything worked fine yesterday. The only changes I made was was that I downloaded Banshee to try as a replacement for Rhythmbox and did a few recommended updates. This morning I tried to boot and it took a long time and I finally got this error: mount: mounting /dev/disk/by-uuid/02bc41cc-1e21-4700-a179-be2805a658c4 on /root failed: Invalid argument mount: mounting /dev on /root/dev failed: No such file or directory mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /proc on /root/proc failed: No such file or directory Target filesystem doesn't have requested /sbin/init. No init found. Try passing init= bootarg. BusyBox v1.18. (Ubuntu 1:1.18.5-1ubuntu4) built-in shell (ash) Enter 'help' for a list of built-in commands (initramfs) I'm not sure what to do beyond this point. I have read around on here and haven't found the help I need. I did try to boot it from the Live CD. I can boot up to the Try Ubuntu/Install Ubuntu screen. When I go through the Try Ubuntu selection I can't access my hard disk. When I clicked on it I got this error: Unable to mount 247 GB Filesystem Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sda/1, missing codepage or helper program, or other error. In some cases useful info is found in syslog - try dmesg|tail or so. I tried dmesg|tail and saw a string of values but nothing that looked helpful. I have also tried to boot from the GRUB screen as recovery mode and previous Linux version but they didn't work either. I tried to load Windows Recovery Environment (loader) (on /dev/sdc3) and got this message: error: no such device: 268057B1805785E9 error: hd1 cannot get C/H/S values I had saw somewhere that I could fix this with the Live CD but my knowledge isn't good enough to try. I tried something with Gpart that I had read, but the system told me that I didn't have Gpart. Could someone please explain to me what I need to do and/or haven't tried yet. Thanks so much!

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• debootstrap linux-generic package and grub

  - by user33993

  I am trying to build a thin client remix using debootstrap. I have been successful but am wondering about one thing. When I install linux-generic as per linuxlivecdcustomizationfromscratch It asks me where I want to install grub. I know the package grub is needed if you install Ubuntu off the live cd, but why is it trying to configure grub using the drives on my host system in the chroot? Thanks

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• Making my own custom Ubuntu

  - by Benny

  I was wondering, is it possible to make my own customized version of Linux based on Ubuntu 10.10 ? I am thinking of calling it something different but I was wondering besides making a custom Live CD I am talking about an Linux that people can install on there computers using Ubuntu installation method. I want to base it on something other than GNOME but be able to install it latter on. Thanks in advance, Benny

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• 2 windows loaders after grub2 repair

  - by adi

  I have recently reinstalled w7 and had ubuntu 12.04 lts installed on it,w7 installation deleted the grub2 loader,after that i found solution to use boot-repair from live-cd session, BUT......now i have 2 windows 7(loader)in grub loader,and only 1 windows 7 installation,how can i remove it?One is on on /dev/sda1(which should be w7 sistem reserved partition) and second is on on /dev/sda2(which is w7 installment partition) it says and both log on same w7.All i need is to remove it without brake the grub2 again and if someone is willing to guide me to add windows on primary selection, cause my girlfriends doesnt get along with linux :D.

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• Why does Unity screen blank out over XDMCP?

  - by James

  My XDMCP sessions display fine until I login. I've checked all logs and settings for this and can't find anything wrong, this works fine on other systems so I'm wondering if this has anything to do with the underlying hardware or an application that loads when logging in. System details: - Ubuntu 12.04 (Desktop, installed via Alternate CD for RAID) - 8GB of RAM - Core2Quad CPU @ 2.40GHz - Gigabit Network (Ethernet) Other notes: - Running with the onscreen keyboard enabled - Works fine when logging in locally Pre-login: Once logged in:

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• Brasero Burns Data, Not Time - or Piles of Discs

  <b>Linux Insider:</b> "There are a lot of CD/DVD burners for Linux out there, but Brasero stands out as a straightforward, easy-to-use, burner that has some nice extra features but won't make you relearn a lot of complex commands if you only use it occasionally. One nicety is the option to start a burn project and finish it much later, even if you're not using a rewritable disc."

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• Need help to install Ubuntu on Win7 Alienware M17xR3, installing not working

  - by Rodrigo

  Please I need help to install linux on my computer to start analyzing Next Generation Sequencing (molecular genetics) for my work. I've tried to install from all different ways and forms and it gave me different errors. First I will describe my system: Alienware M17x R3 Raid Drive 596GB (2x 298 GB) Windows7 primary partition C: The hardrive is divided in 3 primary partitions (can't do 4 don't know why) 1st: Fat16 no name capacity 40mbs almost not used (has files like command.com, dellbio.bin, dellrmk.bin and oobedone.flg) I dont know what this is for but is blocked and non system (Status:none). 2nd: Recovery NTFS 9GB (Status:system) and it seems to have boot files. 3rd: CD: Windos OS (status:boot). And I have 2 Logical drivers F: data for backup and games :D (300gb) G: For trying to install the Linux (Already tried with Fat32, Ext2, ext3 and ext4) Installing with Wubi on F: and G: Instalation looks good on windows ask to restart dos mode appears: try (HD0,0) non-ms:skip try (HD0,1) NTFS5: No Wibildr try (HD0,2) NTFS5: Error: "Prefix" is not set. Installing with Wubi on C: Installation looks good on windows ask to restart dos mode apears: Mount denied becouse NTFS volume is already exclusive opened, the volume may be already mounted or another software may use it which could be identified for example by the help of the 'FUSER' command Mount devdm-4 Could not find installation files /ubuntu/install custom-installation Run 'Chkdsk /r' on windows and restart...blablablalba... that should correct. done this didn't work. Tried installing with USB drive and after burning a CD with the Iso file download from the official website: I've tried the option to install along windows with a G: drive in FAT32, EXT2,3 and 4, I've tried to leave unallocated data, without the driver G at all... appears this everytime: http://i.stack.imgur.com/eo2Ie.png pres ok it ask me to: Not possible to install the boot loader at the location: specify new location: I've tried to select all the drivers non is accepted If I ask to continue without installing the boot loader he ask me to install later by myself which I'm trying to figure it out but I'm not really good to understand how ppl get to the programming part like a DOS to write down couse I'm a newb and I've dont work on dos or linux before... I've read that the boot loader has to be installed on the primary partition, but I'm not sure what I can delete from those 2 partitions that would let me get 1 extra... and it seems that the one that windows use is protected to write down so the software is not touching it... Please if someone have any idea to help me out... I've got a course tomorrow of how to use the software to analyze the data and I wanted to take my computer with me, so I've passed the last 3 days trying to search different ways to solve. My question is also post on the bugs.launchpad.net link here: lounchpad.net bug #882695

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• How do I make custom bootsplash and wallpapers [closed]

  - by joel

  Possible Duplicate: How to customize live Ubuntu CD? I would like to customize my Ubuntu install with my own Wallpaper. I know where to change the wallpapers I copy my wallpaper in /usr/share/wallpapers and then modify the contests/xml file in order to use it but thats about it. how can I also change the following with the same Image: the login image(lightdm) boot screen and shutdown screen(plymouth)

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• Win7 can't be loaded after installing ubuntu 11.10

  - by Kirill Lykov

  I use MacBookPro8,2. First of all I installed MacOS, then WIn7 on sde4, then Ubuntu on sde5 and swop on sde5. After installing ubuntu win7 isn't loaded when I choose it in grub. Win boot writes the following message: file: \boot\BCD Status: 0xc0000225 An error occurred while attempting to load the boot configuration data What shall I do? Try to repair windows using CD(in this case I think I will damage grub) or I can somehow configure grub to make it work properly?

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• Booting Ubuntu on HP Pavilion g7 - 13.04 [duplicate]

  - by death2040

  This question already has an answer here: My computer boots to a black screen, what options do I have to fix it? 24 answers I have a HP Pavilion G7 with an AMD A4 processor and Radeon graphics. I want to install Ubuntu on my laptop but whenever I put the Ubuntu live CD in it and boot to it, the screen shows the Ubuntu logo and the four little dots then after about a minute or two the screen goes black. I can tell the screen is still on but it doesn't have anything on it. I'm beginning to wonder if its a driver problem but I can't really install the drivers when I cant even get Ubuntu to show anything except a loading screen. I've already tried using 12.04 and 12.10 and all the others down to Ubuntu 10. none of them worked. All the other versions don't even show the Ubuntu logo. I'd prefer to have Ubuntu 13.04 on it if its possible but I haven't had any luck finding a solution. I've also tried using WUBI installer in Windows 7 but all that did was make my computer slower for windows and it does the same with the screen when i boot it to Ubuntu. I'm trying to use Ubuntu alongside Windows 7. I cant find any solution on Google. It wont load anything and I know that there is a program called grub on Ubuntu that I used on my desktop computer when it had graphics trouble but the trouble with my desktop was minor things like the screen would flash and then show weird patterns on the screen. But I can't find anything on what to do with the HP laptop. Please help. I use this laptop a lot for games on Windows 7 and I just want to use Ubuntu for when I take my laptop to school and for school stuff. Edit: I just tried booting it in nomodeset and some other things and still didn't work. It did boot up but now when it goes to install alongside windows it crashes and says Ubuntu is forcing reboot or something like that Also, this question is different from the black screen at boot issue because when I do use nomodeset on my computer and select install Ubuntu it will go as far as the screen where you can choose to replace Windows or run alongside Windows. Then after I click continue it ejects the live CD and turns off my computer without installing anything. The error message it shows when it ejects the disk says signal 15, shutting down - modem manager [1675]: <info> Caught nm-dispatcher.action: Caught signal 15, shutting down... *Deconfiguring network interfaces... Please remove installation media and close the tray (if any) then press ENTER *Deactivating swap... *Stopping remaining crypto disks... *stopping early crypto disks... unmount: /run/lock: not mounted unmount: /run/shm: not mounted

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• EXALYTICS - If Oracle BI Server Does Not Fail Over to the TimesTen Instance

  - by Ahmed Awan

  If the BI Server does not fail over to the second TimesTen instance on the scaled-out node, then ensure that the logical table source (LTS) for the repository has mapped both TimesTen physical data sources. This mapping ensures that at the logical table source level, a mapping exists to both TimesTen instances. If one TimesTen instance is not available, then failover logic for the BI Server at the DSN level tries to connect to the other TimesTen instance. Reference: http://docs.oracle.com/cd/E23943_01/bi.1111/e24706/toc.htm

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• No Orca magnification in Ubuntu 12.04

  - by Mr Dimly

  I'm a visually impaired Linux/Ubuntu newbie. I've installed 12.04 from a live CD and have the Orca screen reader running at start up. Speach works fine but there is no magnification. When I open Orca preferences there is no magnification tab. I have tried uninstalling Orca and re-installing if from the Software Centre, but still no magnification. Can anyone tell me how to add magnification to Orca? Thanks.

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• BAR - Backup archiver program

  <b>Ubuntu Geek:</b> "BAR is backup archiver program to create compressed and encrypted archives of files that can be stored on a hard disk, CD, DVD, or directly on a server via FTP, SCP, or SFTP. A server mode and a scheduler are integrated for making automated backups in the background. A graphical front end that can connect to the (remote) server is included."

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• Obtaining positional information in the IEnumerable Select extension method

  - by Kyle Burns

  This blog entry is intended to provide a narrow and brief look into a way to use the Select extension method that I had until recently overlooked. Every developer who is using IEnumerable extension methods to work with data has been exposed to the Select extension method, because it is a pretty critical piece of almost every query over a collection of objects.  The method is defined on type IEnumerable and takes as its argument a function that accepts an item from the collection and returns an object which will be an item within the returned collection.  This allows you to perform transformations on the source collection.  A somewhat contrived example would be the following code that transforms a collection of strings into a collection of anonymous objects: 1: var media = new[] {"book", "cd", "tape"}; 2: var transformed = media.Select( item => 3: { 4: Media = item 5: } ); This code transforms the array of strings into a collection of objects which each have a string property called Media. If every developer using the LINQ extension methods already knows this, why am I blogging about it?  I’m blogging about it because the method has another overload that I hadn’t seen before I needed it a few weeks back and I thought I would share a little about it with whoever happens upon my blog.  In the other overload, the function defined in the first overload as: 1: Func<TSource, TResult> is instead defined as: 1: Func<TSource, int, TResult>   The additional parameter is an integer representing the current element’s position in the enumerable sequence.  I used this information in what I thought was a pretty cool way to compare collections and I’ll probably blog about that sometime in the near future, but for now we’ll continue with the contrived example I’ve already started to keep things simple and show how this works.  The following code sample shows how the positional information could be used in an alternating color scenario.  I’m using a foreach loop because IEnumerable doesn’t have a ForEach extension, but many libraries do add the ForEach extension to IEnumerable so you can update the code if you’re using one of these libraries or have created your own. 1: var media = new[] {"book", "cd", "tape"}; 2: foreach (var result in media.Select( 3: (item, index) => 4: new { Item = item, Index = index })) 5: { 6: Console.ForegroundColor = result.Index % 2 == 0 7: ? ConsoleColor.Blue : ConsoleColor.Yellow; 8: Console.WriteLine(result.Item); 9: }

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• Can I upgrade Lucid to Precise with the 12.04.1 desktop image?

  - by rahmad ars

  I am running Ubuntu Lucid and would like to upgrade to Precise, using the normal ubuntu-12.04.1-desktop-...iso image. So far I have tried upgrading with the CD but was not given the choice. Searching on the internet, I have found upgrading using the ubuntu-12.04.1-alternate-...iso image works, but I don't have great internet access. Is upgrading from Lucid possible, with the ubuntu-12.04.1-desktop image?

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• Sometimes keyboard & touchpad work... sometimes not

  - by Voyagerfan5761

  When I first ran Ubuntu from CD on this Dell Inspiron 2650, it worked for about ten to fifteen minutes, then it hung (I was probably trying to do too much at once from a Live CD). The next time, my mouse and keyboard didn't work. I rebooted three times and finally got them working. I then installed Ubuntu alongside Windows XP. After installing, selecting the OS in GRUB worked, but my touchpad and keyboard were again not working. I rebooted, and they worked. (I fortunately had a USB mouse with which to reboot.) Booting Ubuntu and then rebooting to enable my keyboard and touchpad has become a routine ever since. Often several reboots are required; at one point I had to reboot over a dozen times in a row before getting a session where everything worked properly. (My installation has been in place for about three days a week now.) I've looked around for a device manager equivalent to no avail. Sometimes the hardware is properly detected, and sometimes it's not. Once or twice I've had the keyboard detected properly but the touchpad not. Plugging in my wireless card also sometimes requires a plug, unplug, and plug again to get it working. So is there some solution? I'm without an Internet connection at home, and this "laptop" is really a wall wart on my desk, so suggestions for packages may take a while to test. Xorg logs I captured two three four sample Xorg logs: one from a startup where the devices worked; one from when they didn't; one from a session where Ubuntu thought my touchpad was a normal mouse; and one from a session where my keyboard worked but the touchpad didn't. See this gist. Updated 2010-12-15 01:50 UTC with Xorg.0.log.keyboardonly file illustrating the case where the keyboard worked but not the touchpad. Updated 2011-01-11 04:10 UTC with Xorg.0.log.touchpadregmouse to illustrate a case where the touchpad was detected as a regular mouse (no "Touchpad" tab in mouse prefs).

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• I cant install ubuntu 12.04 on my dell latitude d510

  - by Jose de Jesus

  I download the iso from Ubuntu.com and burned into a CD-R with the program in the page. The disc work right in my desktop but when i run it in my laptop appears another menu with the options prove ubuntu, install ubuntu, check the memory, check for errors, and run windows.When i try the option install appears in the screen "Ubuntu" in the center and littles points down (loading) and after 5 minutes the computer freeze. What can i do?

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