Ubuntu is a Linux distribution with an emphasis on ease of use and installation. Note that http://askubuntu.com is specifically dedicated to Ubuntu questions.

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Running F.lux (Flux) or Redshift with Multiple Monitors with Nvidia Optimus

I have tried installing F.lux and then Redshift, and configured them to run on multiple monitors with no success. I wonder if my setup, which includes Nvidia Optimus setup using Bumblebee could be the ...
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122 views

Why libpam-systemd run interactively on apt upgrade, even when specified force-confdef/force-confold

I upgrade my packages using aptitude, specifying the apt options --force-confdef and --force-confold. This generally works, but the package libpam-systemd (204-5ubuntu20.8, on Ubuntu 14.04) still ...
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753 views

Full disk encryption with dm-crypt (without LUKS)

I am currently trying to achieve full disk encryption using dm-crypt in plain mode without LUKS header with a separate /boot on USB stick. My main goal is to achive plausible deniability on a ...
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1k views

Graph is too large for cairo-renderer bitmaps Error

Im trying to use pyreverse to generate images of UML diagrams for a project source code. When I run the pyreverse command and specify to generate .png images, it runs and then after a while, it shows: ...
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535 views

Compiling and running Snapper for Ubuntu

I am trying to get snapper working in my Mint 14. (The version from launchpad is old and not compatible with Ubuntu 12.10. The OpenSuSe's build project failed to build it, too). So I try my luck with ...
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172 views

To what extent does LXC manage configuring the network interface in a container?

In the LXC config file we can specify an IP address for a container: lxc.network.type=veth lxc.network.link=br0 lxc.network.ipv4 = 10.1.0.35/16 lxc.network.flags=up lxc.network.hwaddr= ...
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448 views

Connect to a VPN from a Linux Virtual Machine

I am running an Ubuntu distro inside a VMWare virtual machine with a bridged connection on a Windows 7 host. What I am trying to do is to have the virtual machine connect to a VPN, but I'm not having ...
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467 views

8-bit input in gnome-terminal

I'm trying to switch from xterm to gnome-terminal but having trouble with alt keys. I have already disabled menu access keys, but I still need 8-bit inputs. In xterm I can set 8-bit inputs in ...
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23 views

Synaptics touchpad inactive before suspend, active after resume

I'm running Ubuntu 15.04. I usually disable the touchpad. (because my palms make the cursor jump all over the screen!) When I suspend (by closing my laptop's lid) and then resume (by opening the ...
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113 views

Restrict the maximum number of independent IP connection on specific port at the same time

I set up a server as a socks5 proxy. I'd like restrict the maximum number(1 or 5 or 20) independent IP connection on specific port at the same time. I have searched on google, only see some articles ...
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78 views

Why is my SSH authentication socket different from the man pages?

These two entries of man ssh-agent describe the SSH authentication socket: $TMPDIR/ssh-XXXXXXXXXX/agent.<ppid> UNIX-domain sockets used to contain the connection to the authentication ...
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4k views

HDMI connection not recognized on Laptop with Ubuntu 14.04

On a Lenovo Laptop with Ubuntu 14.04 I am not able to display the current screen's stuff on a Monitor connected with HDMI. The HDMI cables are both plugged in to the laptop and the monitor, and the ...
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804 views

How to setup unprivileged LXC container without reboot?

I am writing some bootstrapping scripts, and I can't get usermode LXC containers working on vanilla Ubuntu 14.04 headless without a reboot. Here is what i do. First, I download and install Ubuntu ...
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888 views

Grub rescue after corrupted hard-drive (“read-only filesystem”)

I run xubuntu 12.04 alongside a NTFS storage partition and a windows 8 partition. I moved my MySQL data directory off the xubuntu (ext4) partition, onto the NTFS partition, and did an import of a ...
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706 views

nVidia fail after update

I have a 64-bit computer with Ubuntu 14.04, Gnome and nVidia. I had the official drivers from nVidia installed, all working perfectly, even Steam games. I did a reboot after a recent update and the ...
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233 views

windows 7 reinstallation killed grub

I have been running dual boot windows7/ubuntu. Recently I reinstalled windows 7, and I no longer have the option to boot to ubuntu. I would like to be able to get my dual boot working again or at ...
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3k views

How to change position of unity launcher in Ubuntu?

How can I change the position of unity launcher?
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795 views

xorg memory leak

I've read this question but it doesn't seem to be the same issue, as the memory leak there is an order of magnitude smaller than mine and seems to be caused by Nvidia drivers.. Here's my top output at ...
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3k views

Autologin question with LightDM & Ubuntu 14.04

I have set up a batch of workstations at a library using DRBL. These workstations are running Ubuntu 14.04. I want these workstations to autologin to a specific user (a different one for each ...
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930 views

Linux - Only first virtual interface can ping external gateway

I created 3 virtual interfaces with different MAC addresses all linked to the same physical interface. I see that they can successfully arp for the gateway (gw) and they can ping (the request is ...
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4k views

Is there a solution for when a system hangs on “switching to clocksource tsc” anyway?

Ok so this is exactly what I did yesterday, and what I have tried to solve the problem so far. The distribution is Ubuntu Server 12.04. What I have done just before the error appeared I added a new ...
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83 views

pdf viewer for text documents saved as images — bad rendering

The situation I have in mind is a .pdf document obtained from a scan, or at least such that some readers view it as an image (as opposed to text) and render it badly (see the screenshot below) My ...
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985 views

How do I switch to Linux (Ubuntu) on Chromebook?

For reference, the Chromebook model is SNOW FREMONT A-E 0878 I used Crouton to install Ubuntu on my Chromebook. In doing so, I had my computer in developer mode and wasn't able to save anything that ...
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454 views

What is the xcalib -screen number for the HDMI monitor?

I must use a VGA-to-DVI cable and a HDMI cable to run two monitors. I'm trying to invert the colors on both monitors but I can only invert one of them: $ xcalib -invert -alter -s 0 #works $ xcalib ...
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248 views

How can I crop a 1920x1200 monitor to 1920x1080?

I have just purchased a 1920x1200 monitor, and have some situations where I want to force the output to the more common 1920x1080. However, I don't want to distort the output, and would prefer a ...
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82 views

How to add EBCDIC support on debian/ubuntu

I have to add EBCSIC text support to deal with IBM OS text messages. I have succesfuly added EBCDIC support to a CentOS box by adding lang and encoding to /etc/i18n/sysconfig. I searched in the docs ...
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162 views

Awesome WM loads personal rc.lua but then overwrites with system settings

I just started playing with awesome-wm. Sometimes, when I reload my config, the settings hold. Other times, I can see some settings take for a second, but then are overridden by the defaults. I ...
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512 views

What happens if I delete dmraid?

I am new to Linux and am trying to install Ubuntu 12.04.3 LTS from a live-USB and have it run alongside my Windows 7 installation. On the installation screen for Ubuntu, at the partition page, I get ...
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2k views

badblocks and “end_request: I/O error” in output

I have 500GB disk in my toshiba laptop, I tried to do backup of files in this HDD but it failed few times (ubuntu just closed copying operation or unmounted disk during copying files). So I boot my ...
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308 views

Remmina doesn't work with keyboard when connected remotely

In order to bypass firewall/GPO constraint, I want to use Ubuntu as springboard to rdp to a Windows box on the same LAN remotely. I can xrdp to ubuntu via sesman-Xvnc module. I can run remmina from ...
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0answers
373 views

Please enter PIN (Ubuntu, Desktop, 3G Modem) turn off

Upon having booted to my Ubuntu on my notebook which has an internal dial-up device for 3G network, which I don't use anymore, Ubuntu asks for my PIN for the sim card. How can I disable this pin ...
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244 views

Exynos 5 DVFS or turning off cores in Ubuntu - Scaling frequency for one of the cores only (dual core) (cpufreq)

I was wondering if there is possible to scale only one of the cpu cores in the A15 in Exynos 5 ? I have tried using e.g cpufreq-set -c 1 -f 500MHz, but both cores are set to the same frequency. When ...
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208 views

Why message queues are not being used for any system level applications in Ubuntu OS?

In my Linux machine, when i run 'ipcs' command, I have the below information listed srinivas@srinivas-G41MT-S2:~$ ipcs -a ------ Shared Memory Segments -------- key shmid owner ...
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0answers
673 views

Using Creative Sound Blaster on Ubuntu Server

I just got a Creative Sound Blaster for playing audio wirelessly. I connected it to a virtual version of Ubuntu desktop and just had to go into the sound settings and switch it to the USB and the ...
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0answers
649 views

Slow system after running a KDE GUI application from a Debian Squeeze chroot

I have a PC with Ubuntu 11.04 and a Debian Squeeze chroot installed in it. As soon as I start any KDE application from within chroot (and installed there), e.g. Kompare for viewing git diff output, ...
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707 views

Pinguy OS 11.04 WiFi and Wired Networking is not working

I was attempting to install Pinguy OS from a YUMI created USB thumb drive, with the computer wired to my router. The internet, however, was not working. After the install, it still is not working. ...
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39 views

404 Not Found. File exists (mounted)

First off, I will update this post with any information you may need, but since I have no idea where to begin, I will try to summarize the issue. Just ask if you want to see something. I'm having ...
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0answers
74 views

On what level is touch screen support implemented in Linux?

I'm trying to use a Linux OS on my tablet PC (Lenovo Thinkpad Helix 15). I tried Ubuntu, but except for switching and moving windows and bringing up the launcher, there doesn't seem to be a lot of ...
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46 views

Why does file-roller appear to have lower priviledges than the user

In Ubuntu I have a mounted samba share. I have selected some files in a directory on the samba share in nautilus and attempted to compress them to an archive in the same location. File roller tells me ...
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40 views

Error “Can't assign requested address” when ssh-ing to remote server

On ubuntu 14.04 I have installed openssh, changed the ssh port. I can login within LAN with no problems, but I cannot access it from outside. I also have: allowed it though firewall and set up port ...
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0answers
48 views

Sound Problem in ubuntu startup

When Ubuntu boots first time, no sound comes out of speakers. But when I insert any headphone the sound is OK. also when I insert headphone first time and eject it from laptop then sound comes fine ...
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0answers
24 views

Trouble viewing iPod in Rhythmbox

Once in a blue moon, my ipod (160 GB) will show up in rhythmbox on my ubuntu 12.04 laptop when I plug it it, but most of the time nothing happens. It shows up when I do fdisk -l, but when I try to ...
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0answers
161 views

“Cannot open shared object file” Error even though ldconfig is showning entry

I'm trying to run a older SIMetrix Version on Ubuntu 15.04 64bit (if there is a newer version of SIMetrix around tell me!). When I do it I get following error: ...
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0answers
150 views

Force OpenSSH / pam / pam_ldapd to do pam_ldapd(sshd:auth) with public-key authentication

I have working pam_ldap authentication using libpam_ldapd. I'm using slapo-nssov and want to use loginStatus attribute which is added to users ldap entry after opening pam session and deleted when its ...
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0answers
113 views

Reading the program header contents of an ELF file

How is it possible to extract loadable program headers individually from ELF files? By examining a binary using readelf one can get output similar to: $ readelf -l helloworld Elf file type is EXEC ...
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113 views

Can I print via CUPS on ARM device without drivers by installing CUPS onto an x86 server with drivers?

I just spent a few frustrating hours troubleshooting on a Raspberry Pi 2 only to find out that it is impossible to print to my Canon printer natively using CUPS. Thankfully, my printer supports Google ...
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101 views

Wifi not working on compaq 6715b running ubuntu 14.04

I'm trying to get WIFI running on an old compaq 6715b laptop. It does not show up in iwconfig, so I assume that I need to install drivers. I've tried using ndiswrapper, and tried "sudo apt-get install ...
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0answers
326 views

vpn l2tp connection on ubuntu 14.10

I am using Ubuntu 14.10 and I need to create a VPN L2TP connection. I installed strongswan, as suggested by this answer, but now I don't understand how to configure the connection. The connection ...
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0answers
39 views

How to map PowerOff button as End on XWindows?

I have this unfortunate PowerOff button on my laptop situated in the place of the End key: I already have a way to disable the PowerOff handler triggered by the OS (Ubuntu 14.04 in my case). Now I ...
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0answers
160 views

Which packages should I install to make Fedora 21 connect to internet by Android Phone?

In the past I used Ubuntu 14.04 and when I want to connect to internet by my Android phone, I connect it directly using USB cable without installing drivers or some packages like using the Huawei ...