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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Problem installing Okular from ppa under Ubuntu

Under Ubuntu 12.04, I installed Okular from a ppa. After I installed it, I ran into the following problem of opening a PDF file: $ okular my.pdf Got bus address: "unix:abstract=/tmp/dbus-5dWEZJSTX0,...
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1answer
14k views

vsftpd: 550 Failed to change directory

I'm using ubuntu 12.04. and ftp service I've installed vsftpd and it's working fine. But may I'm facing some user complexity. My system directory like: -/ --/home ----/rony --/vol When I list ...
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1answer
922 views

How to limit ftp access to multiple places for one user

I don't even know how to write the correct question since it is a little confusing to ask it. Here is the problem. User X would like FTP access to /user/x folder and to /var/www/x folder. How can I ...
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1answer
2k views

How do I run a service with numactl

I need to do something like this to run MongoDB $numactl --interleave=all /usr/bin/mongod --config /etc/mongod.conf & What should I change to be able to run the mongo daemon with the options ...
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1answer
2k views

How to start 2FA-using OpenVPN with systemd?

I have openvpn config that users 2 factor authentication. If I start it manually, by running: /usr/sbin/openvpn --writepid /run/whatever --cd /etc/openvpn/ --config /etc/openvpn/work.conf it asks ...
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Elantech Mouse Touchpad not working well

I have a dual-boot Ubuntu/Debian (GNOME) machine: My mouse touchpad does not work correctly (right-click not recognized, cannot do 2 finger drag and drop/highlight) on Debian, but it does work ...
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1answer
6k views

NTP not syncing in a VM

I'm managing some VirtualBox developer environments. The time drifts out of sync when the box is suspended, so I want to use NTP to keep it in sync. NTP doesn't seem to be doing its job, though - the ...
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1k views

Kernel module for Cisco VPN client doesn't compile under ubuntu 10.04 LTS?

I am trying to install a Cisco VPN client under Ubuntu 10.04 LTS. In the extracted folder I type: alex@alex-laptop:~/Downloads/cisco4.8/vpnclient$ sudo ./vpn_install and there is output of activity ...
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388 views

Copying linux install from non-RAID/x86 to RAID/x86-64

I'm copying an Ubuntu Server install from an x86 machine with a single hard disk to a new machine with x64 and two identical disks. Two partitions will span the new disks: One small-ish RAID1 for ...
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86 views

How do we do programmatically set LD_LIBRARY_PATH for an C# executable? [closed]

How do we do programmatically set LD_LIBRARY_PATH for this scenario? mono-service ./AudioRecorder.exe Where we are running on Ubuntu Linux 14.06 and AudioRecorder.exe is a C# .NET executable. ...
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306 views

Massive disk corruption on Ubuntu 15.10 with dm-crypt + LUKS full disk encryption?

I suspect there's a bug in Ubuntu's default whole disk encryption setup. Here's what happens, repeatably: I make a fresh install, Ubuntu 15.10 with whole disk encryption, overwriting the whole disk ...
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1answer
1k views

Binding a particular IP to a port in apache2

In How to set-up a online SVN server on my laptop I asked to give access to my SVN server installed on my laptop to some of my friends siting in another part of country.I set-up a SVN server.I was ...
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2answers
67 views

How to Make MoveToTrash mean Delete Permanently by One-liner?

I did Move to Trash > Empty Trash. However, .fileNames and .directoryNames stay in the filesystem those .files/.directories which have exactly the same name as my deleted files/directories For ...
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359 views

Enabling triple-head setup with two Nvidia GT730 (Ubuntu)

After installing a second Nvidia GeForce GT730 in the hope of overcoming a single card's limitation of only being able to support two monitors, I still cannot get a 3rd monitor working. I keep the ...
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1answer
63 views

Grab the load average with top

The command below is grabing only the first load average, I would like to grab all the 3 load average. How can I change this code? top -b -n 3 -d 1 | grep "load average" | tail -n 1 | awk '/load ...
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Having trouble setting up an Ubuntu/Windows 8 dual boot

I hope I'm not posting this in the wrong place (and if I am, please direct me to where you think would be a better place to post it) as this doesn't relate entirely to Linux and is really more to do ...
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1answer
33 views

How to Run `reinstall xkb-data` for Broken Installation in Live USB?

I would like to run the following command for the installation that has broken /usr/share/X11/xkb/symbols/us. Editing the file, restarting, just puts the false parameters there back again and again. ...
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1answer
12k views

Wireless not working after update (Network Unclaimed)

I just installed backbox3, during the install im asked to connect to wireless, and it works like a charm, but after i update the system and reboot, i loose wireless... "sudo lshw -C network" gives me:...
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1answer
903 views

How to start a GUI program with PHP from website

My firm has some Ubuntu 12.04 running where there is no display attached and that are behind different firewalls. The visitor on local websites on that servers should be able to start a GUI program ...
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1answer
269 views

Ubuntu shell does not show the current path

In my Ubuntu 12.04, the prompt always show the following only (no matter what path I'm in): -bash-4.2# I guessed it is because .bashrc or .bash_profile is configured incorrectly. My .bashrc is as ...
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42 views

Nvidia bumblebee problems with xubuntu 12.04.5

When I upgrade from ubuntu 12.04.4 to 12.04.5 I can not start my computer on battery power. I can start it with it plugged in then unplug it and run for hours. The only thing I can think of is that ...
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1answer
14k views

How to install squashfs-tools on Ubuntu?

I tried running `unsquashfs and got: $ unsquashfs filesystem.squashfs The program 'unsquashfs' is currently not installed, You can install it by typing: So I went to install it: $ sudo apt-get ...
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1answer
2k views

Rsyslog log rotation using output channels

I'm running rsyslogd 4.2.0 on Ubuntu. I'm trying to use the output channel feature described here: http://www.rsyslog.com/doc/rsyslog_conf_output.html Here's the relevant portion of my config: $...
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1answer
491 views

Can't connect to the Internet

I turned on the machine one day and some websites would load others not. SSH wouldn't work, gmail wouldn't work. So I opened the my ftp client and tried to upload something and it stopped at 0.1 ...
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How to import a large and complex csproj into MonoDevelop 5.10 with Ubuntu 16.04 and the ASP.NET addin?

I would like to know how to import a large and complex csproj into MonoDevelop 5.10 with Ubuntu 16.04 and the ASP.NET addin I tried this method recently , http://stackoverflow.com/questions/9220290/...
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4answers
4k views

Optimal Setup for Windows & Linux - Sharing and Partitioning

This question gets a little complicated so please bear with me. So we have a new custom designed desktop which we will be mostly a dedicated machine for scientific computations in FORTRAN and MATLAB....
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1answer
5k views

How to use sudo in Fedora?

I use to be a fans of Ubuntu, when I want to execute a command as root user, I do this sudo blah_blah_blah. But in Fedora 16, it doesn't seem recognize this command. Any clue on this?
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63 views

My ext4 partition is corruption-prone possibly because of suspend

I'm using an encrypted ext4 main partition on a Lenovo i7 laptop running Ubuntu 14.04 LTS, currently using the 3.13.0-53-generic x86_64 kernel. After running for multiple weeks without shutting down ...
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2answers
291 views

virtualbox-5.0 won't install on ubuntu-server 14.04.4

I can't get virtualbox to install. I recently reinstalled my entire system with ubuntu-server 14.04.4. I added the virtualbox repository as recommended on their website: I added deb http://download....
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1answer
67 views

udev doesn't apply changes recursively

I'm working with a beaglebone black board (ubuntu release for ARM architecture), which has some general purpose input/output (GPIO) interface to read sensors/drive motors etc.. which are configurable ...
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547 views

Kali Linux 1.1.0a doesn't boot from USB

I have Windows 8.1 and Ubuntu installed. I had ran boot-repair since the os selection menu wasn't showing. Few days ago, I downloaded the latest version of Kali Linux. I used PowerISO to copy all the ...
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1answer
687 views

Problem with touch pad in linux

I have a Lenovo g500 laptop and I recently installed Ubuntu 14.04 in it. The problem is that the touchpad in not being dectected. I ran Ubuntu in live mode before installation and the touchpad worked ...
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1answer
180 views

Problems setting up Ubuntu Machine as a router

I have been at this for over 24 hours, here is what I have so far. -I have an Ubuntu Server running version 14.04.2.amd64, called SV-01 -SV-01 has two NICs. ETH1 is for the external network (goes to ...
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1answer
42 views

Discrepancy between Ubuntu 16.10 System Monitor % CPU and ps pcpu, % CPU utilization with respect to the individual Firefox browser process

What is the reason for the following discrepancy between Ubuntu Linux 16.10 System Monitor % CPU utilization and ps pcpu, % CPU utilization with respect to the individual Firefox browser process? For ...
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1answer
43 views

Process login vs user login

In a Ubuntu 14.04 system, who has the following output: user1 :0 2016-05-02 14:49 (:0) user1 pts/4 2016-05-02 15:10 (:0) So apparently just the pts/4 is used. But, for example, ...
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80 views

Possible not restore cpu frequency after suspending and waking up?

When I suspend my Ubuntu 12.04 and wake it up, the cpu frequency I set by clicking indicator-cpufreq on the desktop panel will be restored. I wonder if that is a bug or some design? Is there a way to ...
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1answer
980 views

Find out what caused my Ubuntu rebooting?

My Ubuntu 14.04 on Thinkpad T400 just rebooted automatically. Before that, my screen just became unresponsive. My memory and swap were mostly used, mainly by webpages opened in Chrome and some ...
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55 views

How to change ThisName@HostName ~ $

I am quite new to Linux and I was wondering how to change the following when in terminal permanently. When I set up my computer I used a name that I now want to change: In terminal, the name I want ...
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36 views

mount namespace not work in ubuntu whether 15.04 or 14.04

NOTE: Referencing this Q&A: Why is my bind mount visible outside its mount namespace? It gave an unshare example, but it did not work in Ubuntu. I tried on Ubuntu 15.04, with util-linux 2.25. I ...
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X stopped working after a kernel update

My system is a laptop with Ubuntu 14.04, with an Intel CPU and Intel + Nvidia GPU combo. After one automatic kernel update, the GUI stopped working. It shows a blue loading screen with a spinner, up ...
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416 views

Fine tuning Network manager in AP mode

Ubuntu Network-manager graphical front end only allows creating a Hotspot in ad-hoc mode, but does not allow setting a Hotspot in Infrastructure mode. So I have setup a Wifi AP in infrastructure mode ...
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2answers
130 views

Warning while Booting into Ubuntu

Recently, I installed Kali Linux 2.0 as a third OS on my Dell Latitude E7240. I used Unetbootin to make a bootable USB of Kali Linux. When I booted from it, it gave me options I wasn't used to. I ...
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3answers
98 views

How to get data shown out of workspace or directly from application?

Because of some reason I had to use another web browser than my main which I use daily and I chose a small browser which I installed long time ago. This brower is called Dooble, version 0.07 (dooble-0....
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1answer
57 views

How do I set up a udev rule to mount the SanDisk Cruzer USB upon insertion in order to eliminate an fstab entry?

Suppose I run sudo mount -a after setting /etc/fstab to: /dev/usbhd1 /path/to/mount/point ntfs rw,auto,nofail 0 1 Yesterday, upon asking what steps our architect and I should do next after a ...
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1answer
150 views

How to connect to a virtualbox guest?

I have Ubuntu and I've installed VirtualBox in the desktop and installed CentOS but how would I go about connecting to it remotely via SSH as if I type my IP in? When I do this it just loads the ...
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4k views

How to solve this NFS unmunt problem? [duplicate]

I have working NFS (Networking File Sharing). It's server path will be mounted, but attempts to use umount are not working. It is getting some error. $ sudo umount /nfs_server/ /nfs_server was ...
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3answers
447 views

Change terminal prompt Ubuntu

I have cloned a git repository to a folder in my workspace: /home/jose/workspace/very-very-very-long-repository-name/ so when i browse to it in my terminal it looks like jose@jose-Vostro-1500:~/...
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2answers
941 views

dpkg / apt-get wants to install and overwrite different package

I want to install Pound. Doing this: apt-get install pound produces this: root@myhost:~# apt-get install pound Reading package lists... Done Building dependency tree Reading state information... ...
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2answers
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How to install Octave without GUI in Ubuntu 16.04?

I am really angry. Just installed the new ubuntu and run apt-get install octave. I got tons of crap installed (like Java, some QT libraries, and other pollution). How can I install Octave in Ubuntu ...