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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A stop job is running for LVM

I use full disk encryption which uses an LVM. It uses like this in lsblk: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda ...
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231 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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1k 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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6k 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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1k 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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365 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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502 views

How to configure external USB touchpad for a laptop

I have a laptop that, obviously, comes with a touchpad and a keyboard. However, I have an USB keyboard with integrated touchpad that better suits my needs. I use Ubuntu 13.10 and I cannot find how to ...
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2k 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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309 views

VPS freezes every few days (rcu_sched_state detected stall on CPU x)

Background: I have an Ubuntu 12.04 (64bit) in Xen virtualization environment. 1 GB RAM, 1 processor. Every few days I get the following error message: rcu_sched_state detected stall on cpu 0 (t=...
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3k views

How do I change file/directory permission of a nfs mounted directory, so I access files as user?

On a Ubuntu computer I mounted a directory from another computer using the following line in the fstab: 12.34.56.78:/space/Images /mnt/space/images nfs rsize=16384,wsize=16384,rw,auto,nolock 0 0 ...
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640 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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213 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= 00:16:3e:24:26:...
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69 views

Console: Can't type special characters (Ubuntu 14.04)

We have linux-based computers (Ubuntu 14.04.4) prepared by other company to use their software. We have root password. Those computers has no X Window System. Just consoles. There is a problem with ...
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44 views

SSH with chroot and only working “sftp”, “rsync” (both)?

I have two users and one shared folder in my Ubuntu server: User writer, which has write access to /var/shared. It's an application regularly making file changes in this folder from remote, with SSH ...
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78 views

How do I define an Ubuntu Linux16.04 systemd service for fastcgi-mono-server4 or xsp4?

How do I define an Ubuntu Linux16.04 systemd service for fastcgi-mono-server4 or xsp4? I have already defined an Ubuntu Linux16.04 systemd service for apache2 by copying obex.service to apache2....
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43 views

Getting a Windows 7 installation to run virtualized under Ubuntu?

I've currently installed Windows 7 and Ubuntu via dualboot. To avoid switching the OS by rebooting, i want to be able to start my Windows 7 via a virtual machine. It is important to be able to boot ...
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35 views

Installing Ubuntu: [drm:drm_edid_block_valid [drm]] *ERROR* EDID has major version 0, instead of 1

I'm installing Ubuntu on a laptopt via a bootable USB. The installation goes smoothly until it's time to restart and boot into the system, and which point I'm stuck on a terminal screen with the error ...
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96 views

“at” jobs stuck?

I have a system that uses the at command to schedule simple commands to be executed later. The command in question uses a lock so that multiple commands started at the same time execute sequentially ("...
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78 views

How to create a Music Mix video with kdenlive?

I am trying to use kdenlive (0.9.10) on Ubuntu 14.04 to create a simple music-mix clip (for youtube). This clip has a total length of about 90 minutes and is composed of several mp3 tracks, which ...
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175 views

Can't connect to Virtualbox VM's static IP which is in a different subnet from the hosts's IP, but statically routed to the host HW addr

I have a physical server running Ubuntu Trusty (14.04) at a data centre where they assigned one IP address, as well as a /28 block (16 IP addresses, 14 usable) from a different subnet. They said that ...
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44 views

Use case for qemu-static for same architecture

I just discovered that the 64bit amd version of the Ubuntu package qemu-user-static contains the binary /usr/bin/qemu-x86_64-static. Normally, qemu-user-static is used for emulating another ...
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24 views

Differences in Ubuntu packaging? Eclipse vs. Firefox

Installing a reasonably recent version of Eclipse on Ubuntu (as its upstream Debian) requires a manual install (downloaded directly from the Eclipse website, or a PPA if one can be found). Compare the ...
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65 views

Is this a valid setup for tracking file ownership using Samba share and managing rights?

Just need someone to look over my shoulder and tell me if this setup will work without any big problems down the road after I start adding users. Current setup: Ubuntu 14.0.4LTS Samba 4.1.6-Ubuntu ...
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172 views

Add disks to encrypted LVM partition

If I increase my current encrypted (dm-crypt)LVM partition by adding another disk to it, is the new disk also encrypted or do I need to setup dm-crypt on it as well?
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782 views

start-stop-daemon, services, environment variables, and ansible

So, I have a Java program that runs Ansible. I'd like to run this program as a service. I've written a service script in /etc/init.d that uses start-stop-daemon to run/stop the Java program. I've run ...
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90 views

Wifi and wifi hotspot at once

I have wifi adapter TP-Link TL-WN722N I want to use it to access internet and to share wifi access point at once. I did it on windows 8: netsh wlan set hostednetwork mode=allow ssid="APname" key="...
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77 views

Signing a module for prebuilt kernel

I am developing linux driver for my own PCI device. I have stucked up on starting my module: [14941.205599] mymod321: module verification failed: signature and/or required key missing - tainting ...
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123 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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103 views

php5-embed does not load extensions

While setting up php on my Ubuntu server (using php5-embed under uwsgi/nginx), I noticed curl.so was not being loaded. The file /etc/php5/embed/conf.d/20-curl.ini exists and contains extension=curl.so....
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275 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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115 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 lid),...
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91 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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946 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: user@user-Ubuntu-Laptop:/opt/...
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202 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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4k views

mate-panel --reset command not found

After some updates, our Ubuntu 14 MATE desktop doesn't have a panel, nor does it load a terminal. After pressing ctrl+alt+f1, and logging into our account, I tried the command: mate-panel --reset ...
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3k 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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2k views

Using RAW video encoding with gstreamer & VLC

I'm streaming RAW video with gstreamer like so: gst-launch-1.0 -v videotestsrc ! rtpvrawpay ! udpsink host="127.0.0.1" port="5000" This outputs the following caps: caps = application/x-rtp, media=(...
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407 views

Explanation of the building process of the kernel on Ubuntu/Debian systems

I'm getting into Linux kernel programming and I have successfully built my own kernel several times now. However, I have done it using step by step guides found from the internet and I don't really ...
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0answers
963 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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333 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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4k 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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2k 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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0answers
111 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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133 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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211 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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840 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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3k 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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506 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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3k views

Permission denied when Ubuntu is attempting to mount to a remote Windows share folder

Fellow guys, I encountered the error when I's mounting my Ubuntu server to a remote Windows share folder, the following is the error on terminal after I typed command line 'mount -a': mount error(13)...