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• Why does Ubuntu 12.04 dual boot fail?

  - by Tranas

  Fresh install of XP followed by a fresh install of Ubuntu 12.04 results in the following error: error: unknown filesystem. grub rescue and the machine will not boot. Prior to the 12.04 install, XP worked fine. During the 12.04 install, all partitions and free space was visible, and the install seemed to complete without issues until the error message. Although I can fix the MBR via recovery console in XP and allow the machine to boot to windows, why is GRUB/Ubuntu trashing the boot sequence?

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• Remote Desktop from a ubuntu 13.04 to an Ubuntu 13.04 machine so the user on the second machine can see my movments

  - by user163169

  I would like to remote desktop/VPN from an Ubuntu 13.04 computer (a) to an Ubuntu 13.04 computer(b) so the user(s) on the second machine can see my movements. I would like something a lot like team-viewer or Join.me but these machines do not have Internet but that are attached on a local network and I can VPN to them but that can not see what I am doing and I need them to be able to see my movements.

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• What's the lightest Ubuntu desktop environment? [duplicate]

  - by user242125

  This question already has an answer here: How do I find out which version and derivative of Ubuntu is right for my hardware in terms of minimal system requirements? 5 answers My computer has 1GB ram and a very low graphic card, but I don't know how much powerful it is. My computer is very slow with Ubuntu Unity and I saw that there are many desktop environments which are much faster, even for a slow computer. So, what's the lightest desktop environment.

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• Installing Ubuntu 12.04 shut down?

  - by jrr

  i have installed ubuntu before on my old laptop, i remember it was a breeze. Now im trying to install it on my desktop and i am stuck. i tried the Windows installer, when restarted and selected linux, the pc went to black screen the shut down... tried with cd, i got the ubuntu purple screen, then shut down. its an intel i5 build with 8G ram and asus motherboard...(don't know if it makes any difference) any help?

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• Cannot boot from USB wtih ubuntu 13.10

  - by arunkant

  I downloaded ubuntu 13.10 amd64 iso and used all of following methods to make a install media. UNetBootin Universal USB installer (from windows) But I cannot boot from USB pen drive. Some time it just drop me in grub menu of previously installed ubuntu 13.04. Sometime it show a message "Could not open //fallback.efi: 14 ..." for a moment and then just stays there(blank screen). How to boot from USB pen drive?

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• Cannot access Windows via grub after new dual-boot Ubuntu install

  - by user287474

  I previously installed Ubuntu on a computer that had Windows XP on it and got it successfully to run alongside it. (access both OS systems) Now I installed Ubuntu again on my MSI notebook with Windows 8.1, and I cannot access the GRUB without hitting escape on startup, and even then, I can no longer open windows. Before all of this, I created a recovery point, file history and saved a back up on a external hard drive incase I did anything wrong. Now how can I revert my computer back to it's state before installation.

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• Can't install Ubuntu under Windows 7 using Wubi?

  - by Upendrasinh

  I am new to linux. I want help related to my dell laptop on which I want to install Ubuntu 12.04 LTS within Windows 7. The problem happens when I select the option in installer to *Install ubuntu 12.04 within win7* , after selecting this option the installer closes and command prompt massage appears showing "Attempting to terminating everything" then my cd drive is opens and the installation is closes. I have 500 gb hardisk.

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• How can I do Ubuntu Lucid Desktop installation with HTTP preseed?

  - by netvope

  Installation media: ubuntu-10.04-desktop-i386.iso I tried a lot of different boot parameters, but either the installer ignored the preseed configuration, or it boot itself directly as LiveCD. An example of the boot parameters I've tried: auto url=http://mydomain.com/path/preseed.cfg boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash -- If I remove only-ubiquity, it boots as a LiveCD. If I remove boot=casper, it won't boot. If I add vga=normal locale=en_US console-setup/layoutcode=us console-setup/ask_detect=false interface=auto, it still can't do automatic install. If I remove auto, it's the same. What is the correct boot parameters for launching such an installation? From the apache log of the server hosting preseed.cfg, I see that the installer has no problems fetching the preseed file. My preseed file is almost identical to the one at https://help.ubuntu.com/10.04/installation-guide/example-preseed.txt. Moreover, I have run debconf-set-selections -c preseed.cfg to ensure that the preseed file is correct.

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• how to make a multiboot usb key ?

  - by zillion

  I wanna cut my 8 gb usb key into several partitions to use wintoflash for a windows xp (maybe nlited before) and I wanna put also the Framakey ubuntu-fr remix pack into it has the second bootable OS and tweak and mod it a little cause if I can I wanna switch ubuntu 9.04 included to the LTS version ... So someone know how to do it easily ??? IMP : in short I wanna make a dual-boot usb key with windows xp sp3 and ubuntu 8.04.3 LTS ...

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• How can I do Ubuntu Lucid Desktop installation with HTTP preseed file and desktop installation CD?

  - by netvope

  Installation media: ubuntu-10.04-desktop-i386.iso I tried a lot of different boot parameters, but either the installer ignored the preseed configuration, or it boot itself directly as LiveCD. An example of the boot parameters I've tried: auto url=http://mydomain.com/path/preseed.cfg boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash -- If I remove only-ubiquity, it boots as a LiveCD. If I remove boot=casper, it won't boot. If I add vga=normal locale=en_US console-setup/layoutcode=us console-setup/ask_detect=false interface=auto, it still can't do automatic install. If I remove auto, it's the same. What am I missing? From the apache log of the server hosting preseed.cfg, I see that the installer has no problems fetching the preseed file. My preseed file is almost identical to the one at https://help.ubuntu.com/10.04/installation-guide/example-preseed.txt. Moreover, I have run debconf-set-selections -c preseed.cfg to ensure that the preseed file is correct. Any ideas?

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• What's required to configure Ubuntu to use a specific DNS server?

  - by ks78

  I've setup two Amazon EC2 instances, both running Ubuntu Server. One is configured as a DNS server running bind9, which will be used to allow EC2 instances to communicate with each other based on hostname rather than IP, since their private IPs may change. I think I have the DNS server setup correctly. I want to use the second EC2 instance to test the DNS server. Using Webmin, I've added the DNS server's private IP to the client's DNS Servers list and added the domain to the Search Domains list. I did have to edit /etc/dhcp3/dhclint.conf to make my changes stick. After reboot, I expected I'd be able to ping or nslookup the DNS server from the test client, but it can't seem to find the server. Is there something I'm missing? What's required to configure an Ubuntu client to use a DNS server? I just want to make sure I'm not missing something before I assume the server's the problem.

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• Puppet - how can i copy a file to several user folders?

  - by Eliot Rocha

  Well i was using the info on this: Puppet - Any way to copy predefined custom configuration files for software on clients from the puppet master (host)? But i need some more elaborated, because i have several Desktops and are in use by 2 or 3 users each one, so i want to make a class for copy a shortcut in his desktops. The computers are joined to a domain, so any user can log in any desktop, and his profile is created in every desktop. I've tryed with this: class applink { file { "/home/installer/Escritorio/Workdesktop.desktop": owner => installer, group => root, mode => 770, source => "puppet://$server/files/Workdesktop.desktop" } This is only for one user called "installer", how can do this for several users? Can i use $USER for do this? Any Thoughts? Thank You!

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• how do i uninstall reviewboard

  - by TheIG

  reviewboard on ubuntu VM

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• Graphics and USB devices freezing soon after OS loads

  - by Andrew

  I run Ubuntu/Windows dual boot. Last night I started the upgrade to Ubuntu 12.04, and my computer has not worked since in either Windows or Ubuntu. Here's what I got when I rebooted after the upgrade, and continue to get every time I boot: Gets to GRUB screen OK. Choose Ubuntu - black screen or crazy purple lines. At first I assumed something went wrong with the upgrade (often happens). Choose Windows - works fine, I log in, but soon after that the graphics freeze (sometimes with purple artifacts). The keyboard and mouse (both USB) also lose power at the same instant, and none of the USB ports have power to them. This happens sooner or later every time I boot. Update: the HDD also appears to lose power at the same point. I have tried a live CD, but my computer refuses to boot any CD even after disabling all other boot options in the BIOS. I have disconnected everything except keyboard, mouse, graphics card with one monitor, one RAM sick and HDD; no change. I also took the little battery out to reset CMOS. I am pretty sure no matter how wrong the Ubuntu upgrade went, it wouldn't cause the above symptoms in Windows. So the only explanation I can think of is that a hardware failure occurred at the same time. Some possible causes of this I can think of are: A couple of days before this, I added a third screen (which worked fine). About a week before, my house lost power in a storm (no ill effects over the past few days though). What can I do, other than buy a new motherboard/CPU and hope it works? Unfortunately I don't have another box to swap parts into to test at the moment.

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• rhel/centos vs. ubuntu (possibly other debian-based systems) linux in handling duplicate ips in the same subnet

  - by johnshen64

  This has bothered me for quite a while but I never found out why or how to change the behavior. ip duplicates could be caused by typos or dhcp errors etc., but they do occur from time to time. in rpm-based systems such as centos, the old server with the duplicate ip wins, and the new server will get an error in bringing up the nic (ip address already used). this is somewhat harmless because we can just fix the system that is coming up. ubuntu only the other hand happily grabs the used ip for itself and leave the old server/device without a valid ip. this is the more dangerous behavior because it causes outages. what i want is to change the ubuntu behavior to that of the centos/rhel so would appreciate any help.

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• Ubuntu: How can i delete my password of mysql(I dont want password)?

  - by meyosef

  Ubuntu: How can i delete my password of mysql(I dont want password to enter to my database)? Thanks, Yosef

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• ubuntu-10.04-desktop-i386 does not work with HTTP preseed?

  - by netvope

  Installation media: ubuntu-10.04-desktop-i386.iso I tried a lot of different boot parameters, but either the installer ignored the preseed configuration, or it boot itself directly as LiveCD. An example of the boot parameters I've tried: auto url=http://mydomain.com/path/preseed.cfg boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash -- If I remove only-ubiquity, it boots as a LiveCD. If I remove boot=casper, it won't boot. If I add vga=normal locale=en_US console-setup/layoutcode=us console-setup/ask_detect=false interface=auto, it still can't do automatic install. If I remove auto, it's the same. What is the correct boot parameters for launching such an installation? From the apache log of the server hosting preseed.cfg, I see that the installer has no problems fetching the preseed file. My preseed file is almost identical to the one at https://help.ubuntu.com/10.04/installation-guide/example-preseed.txt. Moreover, I have run debconf-set-selections -c preseed.cfg to ensure that the preseed file is correct.

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• Problems installing Linux to IDE connected compact flash card

  - by mathematician1975

  I have been trying to install Ubuntu on some hardware (Netcom NC-499 board that contains a Vortex86DX processor). I am trying to install to a compact flash card attached to the board via an IDE adaptor, the aim being that the board will boot up and simply treat the compact flash like a normal hard drive. The processor vendor claims support for Ubuntu 10.04 but I am having problems installing it onto the card. I have been trying using a USB CD-ROM drive and the standard .iso image from the ubuntu site (md5 checksum works out fine so no problem there) but I have had no success at all. I have been able to do this with Ubuntu 8.04 but with no other version (9.04 and 10.04 desktop and alternative discs all fail). My question is what other options are available to me to try and install this? I have googled myself apart trying to find out but other than a few sites describing USB based installs using flash memory sticks for very specific hardware, I have found no useful info at all. Any suggestions will be gratefully received.

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• partitioning problems

  - by Remus Rigo

  I had on my laptop a dual system (Ubuntu 11.04 and Windows 7) and someway the partitions messed-up. Windows stopped from booting, I just got a blinking cursor, but Ubuntu worked fine. I tried to fix the windows boot (fixmbr, fixboot, bootsect /nt60 C:/....) but now grub was overwritten and I have no OS. Finally I formatted the hdd (low format), installed Windows, partition hdd with paragon partition manager and now I want to install Ubuntu, but Ubuntu sees an empty hdd, weird, can anyone tell me what can I do? EDIT: I have created: partition 1: 100MB ntfs - windows reserved (drive B) partition 2: 50GB ntfs win 7 (drive C) partition 3: 50GB ext3 linux partition 4: 'the rest' ntfs for data (drive E) (the swap i will create after)

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• Agent admitted failure to sign using the key.

  - by Delirium tremens

  .ssh dir is chmodded 700, id_rsa.pub 600, id_rsa 400. I ran ssh-keygen -t rsa, imported key to launchpad and ran bzr branch lp:unity, but got error message: Agent admitted failure to sign using the key. Permission denied (publickey). bzr: ERROR: Connection closed: Unexpected end of message. Please check connectivity and permissions, and report a bug if problems persist. auth.log: Nov 28 20:23:13 ubuntu sudo: deltrem : TTY=pts/0 ; PWD=/home/deltrem/Documentos/repositories ; USER=root ; COMMAND=/usr/bin/bzr branch lp:unity Nov 28 20:39:01 ubuntu CRON[2959]: pam_unix(cron:session): session opened for user root by (uid=0) Nov 28 20:39:01 ubuntu CRON[2959]: pam_unix(cron:session): session closed for user root Nov 28 20:41:04 ubuntu gnome-screensaver-dialog: gkr-pam: unlocked login keyring

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• How to make sure that grub does use menu.lst?

  - by Glen S. Dalton

  On my Ubuntu 9.04 ("Karmic") laptop I suspect grub does not use the /boot/grub/menu.lst file. What happens on boot is that I see a blank screen and nothing happens. When I press ESC I see a boot list which is different from what I would expect from the menu.lst file. The menu lines are different and when I choose the first entry it does not use the kernel options that are in the first entry in menu.lst. Where do the entries that grub uses come from? How can I find out what happens, is there a log? I could not find anything in /var/log/syslog or /var/log/dmesg about grub using a menu.lst. How can I set it to work like expected? Some Files: $ sudo ls -la /boot/grub/*lst -rw-r--r-- 1 root root 1558 2009-12-12 15:25 /boot/grub/command.lst -rw-r--r-- 1 root root 121 2009-12-12 15:25 /boot/grub/fs.lst -rw-r--r-- 1 root root 272 2009-12-12 15:25 /boot/grub/handler.lst -rw-r--r-- 1 root root 4576 2010-03-19 11:26 /boot/grub/menu.lst -rw-r--r-- 1 root root 1657 2009-12-12 15:25 /boot/grub/moddep.lst -rw-r--r-- 1 root root 62 2009-12-12 15:25 /boot/grub/partmap.lst -rw-r--r-- 1 root root 22 2009-12-12 15:25 /boot/grub/parttool.lst $ sudo ls -la /vm* lrwxrwxrwx 1 root root 30 2009-12-12 16:15 /vmlinuz -> boot/vmlinuz-2.6.31-16-generic lrwxrwxrwx 1 root root 30 2009-12-12 14:07 /vmlinuz.old -> boot/vmlinuz-2.6.31-14-generic $ sudo ls -la /init* lrwxrwxrwx 1 root root 33 2009-12-12 16:15 /initrd.img -> boot/initrd.img-2.6.31-16-generic lrwxrwxrwx 1 root root 33 2009-12-12 14:07 /initrd.img.old -> boot/initrd.img-2.6.31-14-generic The only menu.lst that I found: $ sudo find / -name "menu.lst" /boot/grub/menu.lst $ sudo cat /boot/grub/menu.lst # menu.lst - See: grub(8), info grub, update-grub(8) # grub-install(8), grub-floppy(8), # grub-md5-crypt, /usr/share/doc/grub # and /usr/share/doc/grub-doc/. ## default num # Set the default entry to the entry number NUM. Numbering starts from 0, and # the entry number 0 is the default if the command is not used. # # You can specify 'saved' instead of a number. In this case, the default entry # is the entry saved with the command 'savedefault'. # WARNING: If you are using dmraid do not use 'savedefault' or your # array will desync and will not let you boot your system. default 0 ## timeout sec # Set a timeout, in SEC seconds, before automatically booting the default entry # (normally the first entry defined). timeout 3 ## hiddenmenu # Hides the menu by default (press ESC to see the menu) #hiddenmenu # Pretty colours color cyan/blue white/blue ## password ['--md5'] passwd # If used in the first section of a menu file, disable all interactive editing # control (menu entry editor and command-line) and entries protected by the # command 'lock' # e.g. password topsecret # password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/ # password topsecret # examples # # title Windows 95/98/NT/2000 # root (hd0,0) # makeactive # chainloader +1 # # title Linux # root (hd0,1) # kernel /vmlinuz root=/dev/hda2 ro # Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST ### BEGIN AUTOMAGIC KERNELS LIST ## lines between the AUTOMAGIC KERNELS LIST markers will be modified ## by the debian update-grub script except for the default options below ## DO NOT UNCOMMENT THEM, Just edit them to your needs ## ## Start Default Options ## ## default kernel options ## default kernel options for automagic boot options ## If you want special options for specific kernels use kopt_x_y_z ## where x.y.z is kernel version. Minor versions can be omitted. ## e.g. kopt=root=/dev/hda1 ro ## kopt_2_6_8=root=/dev/hdc1 ro ## kopt_2_6_8_2_686=root=/dev/hdc2 ro # kopt=root=UUID=9b454298-18e1-43f7-a5bc-f56e7ed5f9c6 ro noresume ## default grub root device ## e.g. groot=(hd0,0) # groot=70fcd2b0-0ee0-4fe6-9acb-322ef74c1cdf ## should update-grub create alternative automagic boot options ## e.g. alternative=true ## alternative=false # alternative=true ## should update-grub lock alternative automagic boot options ## e.g. lockalternative=true ## lockalternative=false # lockalternative=false ## additional options to use with the default boot option, but not with the ## alternatives ## e.g. defoptions=vga=791 resume=/dev/hda5 ## defoptions=quiet splash # defoptions=apm=on acpi=off ## should update-grub lock old automagic boot options ## e.g. lockold=false ## lockold=true # lockold=false ## Xen hypervisor options to use with the default Xen boot option # xenhopt= ## Xen Linux kernel options to use with the default Xen boot option # xenkopt=console=tty0 ## altoption boot targets option ## multiple altoptions lines are allowed ## e.g. altoptions=(extra menu suffix) extra boot options ## altoptions=(recovery) single # altoptions=(recovery mode) single ## controls how many kernels should be put into the menu.lst ## only counts the first occurence of a kernel, not the ## alternative kernel options ## e.g. howmany=all ## howmany=7 # howmany=all ## specify if running in Xen domU or have grub detect automatically ## update-grub will ignore non-xen kernels when running in domU and vice versa ## e.g. indomU=detect ## indomU=true ## indomU=false # indomU=detect ## should update-grub create memtest86 boot option ## e.g. memtest86=true ## memtest86=false # memtest86=true ## should update-grub adjust the value of the default booted system ## can be true or false # updatedefaultentry=false ## should update-grub add savedefault to the default options ## can be true or false # savedefault=false ## ## End Default Options ## title Ubuntu 9.10, kernel 2.6.31-14-generic noresume uuid 70fcd2b0-0ee0-4fe6-9acb-322ef74c1cdf kernel /vmlinuz-2.6.31-14-generic root=UUID=9b454298-18e1-43f7-a5bc-f56e7ed5f9c6 ro quiet splash apm=on acpi=off noresume initrd /initrd.img-2.6.31-14-generic title Ubuntu 9.10, kernel 2.6.31-14-generic (recovery mode) uuid 70fcd2b0-0ee0-4fe6-9acb-322ef74c1cdf kernel /vmlinuz-2.6.31-14-generic root=UUID=9b454298-18e1-43f7-a5bc-f56e7ed5f9c6 ro sing le initrd /initrd.img-2.6.31-14-generic title Ubuntu 9.10, memtest86+ uuid 70fcd2b0-0ee0-4fe6-9acb-322ef74c1cdf kernel /memtest86+.bin ### END DEBIAN AUTOMAGIC KERNELS LIST These are the choices that grub displays after i press ESC: Ubuntu, Linux 2-6-31-16-generic Ubuntu, Linux 2-6-31-16-generic (recovery mode) Ubuntu, Linux 2-6-31-14-generic Ubuntu, Linux 2-6-31-14-generic (recovery mode) Memory test (memtest86+) Memory test (memtest86+, serial console 115200)

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• What to do when launchpad is down?

  - by Jon

  As I am writing this (Friday, November 8, 2013 at 9:59:18 PM EST) launchpad is down. Apparently there is a power failure (https://twitter.com/launchpadstatus/status/398980619880775680). I tried running sudo apt-get update on my Ubuntu install. However, I simply get stuck on this: Ign http://ppa.launchpad.net precise InRelease 100% [Waiting for headers] Being a Ubuntu newbie, I tried to point my sources.list file to a different source. I backed up the original sources.list and then deleted the entire file to start afresh. I then added the following lines to it: deb http://mirror.anl.gov/pub/ubuntu/ precise main deb-src http://mirror.anl.gov/pub/ubuntu/ precise main I figured that since I have a different mirror, there would be no problem updating. I was wrong. I get stuck at the same place. I have several questions: Why do I need to hit launchpad? I do not reference it in my sources.list file at all. Is this something where the mirror redirects me to launchpad? Is there a good article out there that I can read on how exactly this whole apt-get update thing works that will help me understand why it is hitting launchpad? Is there any way to get my Ubuntu to update while launchpad is down? Isn't there any redundancy for the launchpad servers?

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• How to recover deleted files?

  - by vijay.shad

  Hi My laptop has two os. one is windows vista. and other is Ubuntu. I am currently on ubuntu system, this is my primary OS. There are 4 partitions of my hard disk Windows OS Linux(Ubuntu OS) Data Now the problem part. The data partition is NTFS. I have mounted this partition on the location /media/windrive-a under ubuntu OS. A little while back i decided to delete the mounting of the data partition and i fired command rm -r /media/windrive-a/. To give me a shock; all my data on data drive is gone. Now, I know this is not the command to remove mounted partition. But I have committed the wrong. Is there any way i can get my data back. These are very important data for me. Please suggest.

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• Why doens't my Postgres user have permissions to add a Postgres database?

  - by orokusaki

  First, I ran: sudo su postgres createuser -U postgres foouser -P which worked fine, and I ran: createdb -U foouser -E utf8 -O foouser foodatabase -T template0 and got "permission denied: cannot create database" Firstly, should I even su as postgres to do operations like the first one (assuming my postgres data dir is owned by postgres), or is -U postgres from any user (assuming trust is used in pg_hba.conf) sufficient? Secondly, why am I running into this error? Is this because the user foouser is a non-superuser? Should I create foodatabase using the postgres user and simply -O foouser?

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• How Ubuntu cloud version enforces the "no root login" over ssh ?

  - by Maxim Veksler

  Hello, I'm looking to tweak ubuntu cloud version default setup where is denies root login. Attempting to connect to such machine yields: maxim@maxim-desktop:~/workspace/integration/deployengine$ ssh [email protected] The authenticity of host 'ec2-204-236-252-95.compute-1.amazonaws.com (204.236.252.95)' can't be established. RSA key fingerprint is 3f:96:f4:b3:b9:4b:4f:21:5f:00:38:2a:bb:41:19:1a. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'ec2-204-236-252-95.compute-1.amazonaws.com' (RSA) to the list of known hosts. Please login as the ubuntu user rather than root user. Connection to ec2-204-236-252-95.compute-1.amazonaws.com closed. I would like to know where this is setup and how I can change the printed message? Thank you, Maxim.

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