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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Start vino-server in Ubuntu 16.04 lts

I'm trying to raise vino-server in Ubuntu 16.04 but I could not. I am using this script and let me start by terminal: # /etc/init.d/vino-server.sh start but not as a cronjob: @reboot /etc/init.d/...
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107 views

Ubuntu login loop, amongst other issues!

Before I explain the issue, please bear in mind that I am a complete newbie to using Ubuntu on a desktop. I have some Ubuntu Server experience and know the basics of terminal/CLI. Seems like this is ...
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2answers
55 views

How to create a virtual systemd service to stop/start several instances together?

I plan to host several instances of the same web app for customers using systemd. I would like to be able to stop and start each customer instance using systemd, as well as treating the whole ...
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1answer
58 views

Ubuntu 14.04 black screen after Nvidia Driver 352

I wanted to make use of my Nvidia graphic card so after a little bit of reading I saw that it is possible to change it in the Additional Drivers. It's somewhat similar to here: Ubuntu 14.04 Nvidia ...
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1answer
46 views

Problems creating log file of mono-service assembly output

When we start in the mono-service mode on Ubuntu Linux 16.04 in the background, we would like to create and store a log file at wherever the user wants. I tried this URL, stackoverflow.com/questions/...
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1answer
418 views

Problem with public key on apt-get update

I have Lubuntu 16.04. My problem is similar to this questiuon: sudo apt-get update Get:1 http://it.archive.ubuntu.com/ubuntu xenial InRelease [247 kB] Hit:2 http://ppa.launchpad.net/...
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1answer
76 views

Openvpn exclude ip in pool

I have an OpenVPN server running on a Linux Ubuntu box. Multiple clients connect to this server (500+) and that is why I set the server-bridge option like this: server-bridge 10.0.100.1 255.255.0.0 ...
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1answer
47 views

The LD_LIBRARY_PATH environment variable is not recognized by the target C# executable's runtime environment [closed]

I tested this C++ program on Ubuntu Linux 16.04 yesterday. What bothers me is the fact that the following program starts a mono-service programmatically which I see in the Ubuntu 16.04 /var/log/...
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29 views

PyOpenCL on Linux Mint: PLATFORM_NOT_FOUND_KHR

I've been trying to get PyOpenCL and PyCUDA running on a Linux Mint machine. I have things installed but the demo scripts fail with the error: pyopencl.cffi_cl.LogicError: clgetplatformids failed: ...
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2answers
76 views

How to run a C program as daemon?

I have a C program which I want to run as a daemon. I'm working in ubuntu 14.04LTS. Which is the right way to do that? Can anyone help?
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1answer
47 views

Remapping Caps Lock for every session

I use the following command to remap the Caps Lock key to Esc: setxkbmap -option caps:escape Unfortunately, I have to type the command every time I create a new session. I tried putting it in my ....
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1answer
99 views

I got error “hostname: Name or service not known” when checking IP of hostname

I'm running Ubuntu 14.04 on my company's cloud service (my instance has elastic IP) I want to check out IP of my instance i'm running by command line but it didn't work. root@ubuntu14-graphite:~# ...
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1answer
33 views

How do I make my script launch the screen as non-root

I'm running Minecraft, starting it automatically from from /etc/rc.local. I have that run /home/kent-server/mc/spigot.sh and inside that is screen -dms minecraft Java -jar -Xmx5120M -Xms5120M spigot....
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1answer
37 views

Is it safe to permanently amend the details in etc/os-release

To try to install postgresql onto a machine running zorin 9.0 I've amended the file etc/os-release. It originally looked like this: NAME="Zorin OS" VERSION="9" ID=Zorin OS ID_LIKE=ubuntu PRETTY_NAME=...
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2answers
69 views

How to create a bootable usb stick to any distro linux using terminal

I am working with 'dd' command, and I have a Ubuntu Mate ISO, my stick is sdb, these are steps: umount /dev/sdb1 sudo dd if=/path/ubuntu-mate-16.04-desktop-amd64.iso of=/dev/sdb but this does not ...
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1answer
80 views

Remote headless streaming of GUI from Linux: X says “No protocol specified” before login

The goal: I want to stream video (i.e., to Twitch) of the graphical output of a Java program I'm running on a headless Linux box. I also want to be able to start this up remotely and without a ...
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24 views

grep, failing to find an existing file with correct path given and checked [duplicate]

I need help with grep. Below is what I've written and the If function is working, but the grep part is saying grep: ~/tmp/file.txt: No such file or directory however if I copy and paste the pathway on ...
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16 views

Ubuntu fails to boot after hibernation

I had installed Ubuntu 15.10 in a separate partition on my MBA(MacBook Air 2015 model). I had set it to hibernate on lid-close. It was working all fine, until today it was not able to come back from ...
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1answer
68 views

Apricity OS not show in grub

I have Ubuntu 16.04 installed ( updated through 15.04 -> 15.10 ) . and Windows 10 Dual booted along with it . I tried to Apricity OS rc1 ( md5sum -> 58ad9c6172a2f45e31bd756d83107058 ) to my laptop ...
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39 views

Gray screen and cursor showing after login on Ubuntu GNOME 14.04 and /boot/efi/ empty

So before I talk about my current problem I'll give a bit of backstory. In trying to fix a problem with my boot (fixing duplicated boot entries by moving two files in grub), I ended up breaking my ...
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1answer
49 views

Removing xfce icons and themes

I was wondering if it is safe to delete Xfce themes and/or icon themes that I don't use to save disk space. Additionally, is there a apt or other package manager command to do this? Also, just in case ...
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18 views

Systemd and Interactive Service

I want to run a server application in background which sometimes requires user input as it has a configuration interface which is only accessible through stdin and stdout. Can I attach to Systemd-...
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1answer
182 views

Accessing the NVMe flash drive of the April 2016 MacBook 12" (A1534)

I'm trying to install Linux on the new April 2016 MacBook 12" (A1534). Booting from USB via EFI works fine: I tried Arch Linux (2016.05.01, kernel 4.5.1) and Ubuntu (16.04, kernel 4.4.0-21; and ...
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4answers
598 views

Why does the Google Chrome .exe file I downloaded not work on Ubuntu? [closed]

Why is the Google Chrome browser not available on Ubuntu? I have tried by downloading the .exe file and it did not work.
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42 views

Can't connect to NoMachine NX Server. Using Remmina

My Setup Client Ubuntu OS Remmina Remote Desktop Client + remmina-plugin-nx Server Arch Bang OS NoMachine for Linux - x86_64 Chose fedora system for install My Userlist [folatt@...
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0answers
68 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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1answer
58 views

Problem using GSM USB modems on HP Pavilion laptop

A week ago I migrated from an old PC running Ubuntu 11.04 to Laptop running Kubuntu 16.04. I am having problems using USB modems on the new setup. 1st modem is a ZTE. This modem intermitently loads. ...
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30 views

Is it possible to install deepin onto the same cooldisk (siliconpower 16GB USB3)?

I have made my flash drive bootable using deepin-boot-maker and I have Ubuntu on my computer now. Is it possible to install deepin onto my flash drive from it? I mean: create a partition for ...
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1answer
40 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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38 views

How do we programatically tell if our bash script was succesful in starting or stopping mono-service -l:${LOCK_FILE} ./${PROGRAM_NAME}.exe?

I am running Ubuntu Linux 16.10 on an Ubuntu ThinkStation desktop. I used a bash script just now to restart and stop mono-service on our second Ubuntu Linux 16.04 desktop computer in the following ...
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2answers
47 views

IP tables for home use

I've been trying to set up rules for a desktop I have in my home network and even though at first this configuration worked, I changed something somewhere and now it won't pass any kind of connection. ...
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1answer
46 views

Unable to change username (“user <olduser> is currently used by process <number>”)

I already read this, but it hasn't helped. Not having logged in to the 'olduser', I type sudo usermod -l 'newuser' 'olduser' and it yields the error message from the title of my question. What can I ...
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0answers
93 views

Ubuntu 16.04 with read-only filesystem and writable layer

(This is a cross post from askubuntu, as I think here are more people to know how to get this working) I want to set up Ubuntu 16.04 like a live CD. This worked great in Ubuntu 12.04 but with 16.04 ...
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1answer
38 views

Updating drivers in Windows 10/Ubuntu 14.04 dualboot

I have just recently installed Ubuntu onto my Win10 Laptop on a HP Probook 4530S. Both seem to be working fine with GRUB as the bootloader. I was trying to install an upgrade to the Intel Chipset on ...
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40 views

After Ubuntu update from 15 to 16.04, error in keyboard-configuration package

So I just started the automatic upgrade of my Ubuntu distribution this morning, from 15.xx to the new 16.04, everything went smoothly except for an error I got at the end: something prevented the full ...
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2answers
66 views

No space left on device- on Amazon EC2 instance Ubuntu

I just expanded my storage space on Amazon EC2, after I ran out of volume. However, even after doing so, I receive an error message as follows: ubuntu@ip-172-31-30-27:~/walt/bin$ LC_ALL=C sort -k 1,...
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1answer
82 views

How to regain access to the lost user , linux3 , of two side by side Ubuntu 16.04 instances?

Three days ago, I tried installing the second of two Ubuntu Linux 16.04 versions side by side on the same Lenovo Thinkstation desktop using the procedure described in this URL, http://askubuntu.com/...
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1answer
128 views

Dell and L/Ubuntu16.04 drops wifi connection on all devices [closed]

I installed Lubuntu 16.04 and Ubuntu 16.04 on my Dell Inspiron 7720 (Edimax router) and smth strange happens. At first the connection is established and google can be loaded. When trying to update ...
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1answer
251 views

Cannot run 32-bit executable on 64-bit system with multi-arch support [closed]

I compiled a 32-bit executable for a Linux machine. It runs on most Linux distros without trouble. However, on Ubuntu 16.04 LTS, I get the No such file or directory error when trying to execute it. ...
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2answers
39 views

Is the difference between mono-runtime and mono-complete related to whether MySQL inserts successfully take place on Ubuntu 16.04?

What is the difference between 1. sudo apt-get install mono-runtime and 2. sudo apt-get purge --remove mono-complete followed by sudo apt-get install mono-complete on an Ubuntu linux 16.04 instance? ...
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61 views

Where are the definitions for the prototype declarations in <bsd/stdlib.h>?

I have a C program on Ubuntu 16.04, in which I would like to use arc4random_uniform. typedef unsigned char u_char; #include <bsd/stdlib.h> int main () { return (int) arc4random_uniform(100); } ...
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2answers
459 views

Starting VirtualBox kernel modules …failed

I'm trying to install Virtualbox on my desktop: Processor: AMD FX(tm)-8350 Eight-Core Processor × 8 OS type: 64bit Ubuntu 16.04 Here's a snapshot of my bash history: 35 sudo dpkg -i /home/andy/...
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1answer
79 views

`isolcpus` kernel parameter has no effect on Ubuntu 16.04 desktop

I added the following line to /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="quiet splash isolcpus=1,3" then ran sudo grub-update (and rebooted) but according to top processes are still being ...
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27 views

Change Postfix email recipient on Ubuntu 15.10

I installed Postfix on my Ubuntu machine and i'm using Gmail's SMTP to actually deliver the emails using this tutorial. This is the email headers: Reporting-MTA: dns; crmpicco-desktop X-Postfix-...
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1answer
63 views

What are all the Mono dependencies required to run all types of C# Windows Forms applications?

What are the other Mono dependencies besides mono-runtime and libmono-system-windows-forms4.0-cil required to run C# Windows Forms applications on Ubuntu Linux 16.04? Does the answer to our question ...
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65 views

No perf (linux-tools) for kernel 4.5.2

When I first installed 16.04 LTS, at kernel 4.4.0, I had a decent battery life of about 3 hours average, but I upgraded to 4.5.2 to solve the suspend problem and some other issues, and now it's less ...
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2answers
62 views

When opening a terminal does not require a login?

Speaking about Linux and in particular Ubuntu (from 14.04) systems: Case 1 - As pointed out in this answer, processes that allocate a pseudo-terminal don't need to make a login: for example, cups. ...
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34 views

Vsftpd server will not create ftp user directory

When I try to login to my ftp server I get 500 OOPS: cannot change directory:/mnt/users/alex When I try to do the same thing with sftp I get packet_write_wait: Connection to 10.0.0.8 port ...
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27 views

Reclaiming disk space in Ubuntu

In VMWare the hard disks took 13.6 GB, But with df, only 5.8 GB is occupied I don't quite get it. This Virtual Machine has no snapshots, and I already clicked on refresh button in VMWare Fusion ...
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34 views

Nemo file manager - change focus from the sidebar to the main view (automatically)

I find it hard to change the focus (either by keyboard, or automatically) from the sidebar to the contents view in Nemo 2.8.7 on Ubuntu 16.04. Nautilus does not have this problem. I want to be able ...