Questions tagged [ubuntu-18.04]

The 28th major version of Ubuntu, codenamed Bionic Beaver. It was released on April 26, 2018.

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Can't access BIOS advanced menu and second restart require to enter OS

I am suddenly facing multiple problems in my desktop pc. Problem 1: A few weeks back my PC stops date syncing. Each time I start the PC I have to set the time manually. One online solution suggested ...
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X11 over remote Docker container stops working after resetting VPN

I'm running on ubuntu 18.04, with a "operator" machine VPN'ed into a network that has the "Test" machine. The test machine runs a Docker container that has a GUI application that I forward over X11. ...
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can't mount windows cifs share from ubuntu

I'm trying to mount a folder on a Windows 10 host from Ubuntu 18. Flat wired network, 192.168.1.xxx. Let's keep things really simple. On Windows, net share shows (among others) the default share ...
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VLC plays nothing in Awesome WM

On Ubuntu 18.04.4 LTS, running the window manager Awesome, the only thing that vlc does is print VLC media player 3.0.8 Vetinari (revision 3.0.8-0-gf350b6b5a7) and then immediately return an error ...
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Playing video from USB freezes entire system after hours

I'm trying to have an Intel Compute Stick play a playlist of videos non-stop from a USB stick. Tested with Windows 8 and PowerDVD - runs fine for a week in a row, no problem at all. Exact same ...
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Python import error on startup of Autodocktools

I am trying to start Autodocktools from the command line on Ubuntu 18.04.4 which gives the following error: Run ADT from /usr/lib/python2.7/dist-packages/AutoDockTools Traceback (most recent call ...
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Need help troubleshooting install of Linux Mint 19.3 into 5.2.34 VirtualBox VM. Black screen on VM boot

I am new to both Linux and Virtual Box. Thank you in advance for your patience and your help. At the moment I am having a problem installing Linux Mint into a new VM. When I try to boot the VM I get ...
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Smooth scrolling with i3wm is janky on Google Chrome

Scrolling is very janky on i3wm on Ubuntu. I'm using a Dell laptop which uses the libinput driver for the touchpad. Below is the behaviour I experience while scrolling. The first scroll down on a ...
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ZFS zpool cannot be imported, cause panic if not imported as readonly

After a reboot, ZFS pool never stopped trying to import the pool. It was blocking the boot-sequence and I had to rename the /etc/zfs/zpool.cache to another name, in order to boot the system. There was ...
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Upgrading to Ubuntu 20.04 - Not enough free disk space

So spent the afternoon simply trying to upgrade from Ubuntu 18.04 to 20.04 using the following command sudo update-manager -c -d But repeatedly get the following error popup when the installation ...
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Mkdir creates dir with 777 permission when umask is 0022

I am creating directories inside a container, the user is root and the output of umask is 0022. But if I call mkdir to create new directory its default permission is 777, other than 755. Meanwhile, if ...
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Connect filezilla to root login

SysAdmin who was working in our company setup Ubuntu to this way: I am login as admin and run su-, put password for root and I can run commands. Root user doesn't have home directory. Our developers ...
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Can hardware RAID-1 be enabled on an existing Ubuntu 18.04 system?

I have an ASUS Ubuntu 18.04 system running on an M.2 drive as /dev/nvme1n1. I have added an identical M.2 drive and would like to enable hardware RAID-1 (motherboard supports it). The blank M.2 ...
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116 views

Ubuntu 18.04 to 20.04 - Unresolved issue occured while calculating upgrade

I'm trying to upgrade my ubuntu distro from 18.04 lts to 20.04 lts and I get this error message while it's calculating data, An unresolvable problem occurred while calculating the upgrade. ...
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Automate fast download

When you click on a file to download, can you make it so Aria2 (or Axel) automatically accelerates the download process, without going to the terminal to download? Also, the file I am attempting to ...
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How do I restrict access to all ports with source's PublicKey like SSH does?

I want a server to block any and all incoming traffic on all ports with the exception of the traffic from those machines which can be (and are right there and then regardless of the port being ...
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KVM 2 VMs on one disk

Is it possible to create 2 VMs that share a CPU and 1 virtual disk (using KVM)? If so how would I go about it? I've looked online, but can't really find something that works in the command line.
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Cannot connect to POP3 on Dovecot

I installed Postfix and Dovecot on Ubuntu 18.04. I tested sending and receiving emails via telnet. Everything works from localhost. This is a droplet on DigitalOcean. From any remote system, I can ...
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Move existing control

I am creating a PDF form in LibreOffice Writer. I have some controls and want to move them. Referring to the screenshot, I want to move the Date of Request label and the Date control above the Name ...
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Unable to drag control to form

I am trying to create a PDF form in LibreOffice Writer and I am unable to add any Controls. I have Form > Design Mode and Form > Open in Design Mode checked. I have the Form Controls toolbar ...
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Ubuntu 18.04 lost (was working) internal speakers

The internal speakers were working but due to a problem where I had to reinstall gmd3 gnome xorg and half my system the internal laptop speakers are no longer working. Earphones are auto detected and ...
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Ubuntu block incoming and outgoing connection

How to create an internet kiosk using a firewall? I want to block incoming and outgoing connection except one website and update server in Ubuntu. I used many commands but every time when I block ...
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Can`t remove mystic-mirage ppa

> E: The repository > 'http://ppa.launchpad.net/mystic-mirage/pycharm/ubuntu bionic Release' > does not have a Release file. N: Updating from such a repository can't > be done securely, ...
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On Ubuntu 18:04: scan bluetooth devices results in: org.bluez.Error.InProgress

I'm trying to pair a Bluetooth headset on Ubuntu 18.04 via UI using the blueman UI but it won't find new devices. When I try to manually start discovery I get an error in the status bar: Pressing on ...
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Stuck at blinking cursor with Linux VMs

Host: Windows 10 VM: ubuntu-18.04.3-desktop-amd64 When I boot the VM it only shows the black screen with a blinking cursor. I checked the BIOS, VT-X is enabled. Windows Hyper-V is also disabled. ...
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Chrome forgets all favicons after using it on different machines

When I open Google Chrome (with my user profile) on any machine after using it with the same user profile on any other machine, all bookmark icons disappear (sometimes I see them for a fraction of a ...
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Debugging Ethernet connectivity issues for embedded computer (Odroid N2)

I have a bunch of embedded computers (Odroid N2) that are flashed with the same Ubuntu image. The Ubuntu image sets the Ethernet port eth0 to 192.168.15.201/24. I have a desktop computer with Ethernet ...
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Configure Remmina or other GUI control app through ssh without X forwarding

Due to the COVID-19 crisis, I only have access to my work computer through ssh (so no physical access). Since I connect to this computer through another one that does not allow X forwarding, I can not ...
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214 views

“sudo apt-get upgrade” not working on Ubuntu 18.04 WSL

I tried to upgrade Ubuntu 18.04 LTS to 20.04 LTS in WSL (maybe before it was available for WSL) and it failed to upgrade. After that attempt, I am not able to upgrade any packages using sudo apt-get ...
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Failed to start containerd: timeout waiting for containerd to start in dockerd-rootless.sh

System is Ubuntu 18.04. Docker Version:19.03.8 After trying to setup to run docker in rootless mode as explained here I can not do this, and I encounter error after running command dockerd-rootless.sh ...
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Ubuntu Server 18.04.4 LTS randomly shut down, have syslog clips

So this afternoon I was printing a 35 page document (HP Officejet), when it suddenly stopped. The printer is run by my headless server, with SAMBA and CUPS on Ubuntu Server 18.04.4 LTS. I tried ...
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Should zookeeper user be member of sudo group

Just came across this nicely written advice: How To Install and Configure an Apache ZooKeeper Cluster on Ubuntu 18.04 and found it works smoothly. However, as it creates a separate user zk for ...
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Use Laptop as monitor (Ubuntu 18.04)

I've two laptop, both with ubuntu installed. In the same network, one of them should be converted in a simply monitor (like a slave for the main laptop, but not only share keyboard and mouse like ...
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Create a user in ubuntu 18.04 that only has access to “wakeonlan” command and nothing else?

I have a user that will access my ubuntu server via ssh using a key. I only want this user to be able to run the wakeonlan command to send magic packets I don't want this user to be able to "hack" ...
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setxkbmap: changed layout can't revert back: can't use the second language

I have two languages installed: English and Russian. I have a keybind that allows me to switch between the two using Alt + Shift combination. When I run setxkbmap -query it used to output something ...
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ffmpeg encoding requested yuv420p but got yuvj420p

When I encode with ffmpeg on Ubuntu 18, the default encoder h264 (libx264) uses by default the pixel format yuvj420p. But https://ffmpeg.org/doxygen/trunk/pixfmt_8h_source.html says that ...
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Disable Auto Screen Lock on Inactivity with Console Ubuntu 18.04LTS

How do I disable the automatic screen lock on incactivity with the console/bash? My system: Ubuntu 18.04LTS (VirtualBox) The commands given here did not work.
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No space remained on ubuntu 18.04 running on Oracle VM VirtualBox

I'm using Windows 10, with installed memory RAM 8GB (7,89 GB usable). I'm using Oracle VM VirtualBox on which I'm running ubuntu 18.04 with these settings: VM Settings I was installing a python ...
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iptables and squid can't do web searches

I'm Chris, firstly I'm sorry if my english is wrong, I need some help with iptables. I'm running an Ubuntu desktop 18.04 machine as a proxysquid server (I'm trying to learn how to use iptables so yes,...
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DATA connection terminated without SSL shutdown. Buggy client! Integrity of upload cannot be asserted VSFTPD + Ubuntu 18.04

enabled SSL/TLS in VSFTPD and its getting the below error as per vsftpd.log, while uploading a file. OK LOGIN: Client "::ffff:xx.xx.xx.xx" DEBUG: Client "::ffff:xx.xx.xxx.xx", "DATA connection ...
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Encrypting the hard drive without formatting

Is there a way to encrypt an hard drive in ubuntu after installation? I know we can encrypt while installing the OS but I dont want to re-install the OS. There are 300gb of files and applications ...
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25 views

How to install RStudio in Ubuntu MATE

I had recently installed Ubuntu MATE 32-bit on my Raspberry Pi 3B+. When I go through the steps in any installation process for RStudio, I find out it doesn't work or it's not what I am looking for. I ...
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Audio over RDP or TeamViewerr

I have a windows server instance on AWS and am able to hear audio over RDP. I'm new to Linux and can't figure how to hear audio over RDP or TeamViewer from a Linux Ubuntu lxde instance. Thank you ...
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Ubuntu docker image /bin/sh: 1: ufw: not found

Trying to open a port on an ubuntu 18.04 image and no luck Running RUN ufw allow 8080 returns /bin/sh: 1: ufw: not found Any ideas as to how I can open this port or run ufw commands?
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Nslookup does not resolve IP addresses using the secondary DNS

I have two Ubuntu 18.04 DNS servers and a Windows 7 client in a virtual environment. I have set the Ubuntu servers for clients' DNS. The first one is offline and the second is online. When i try to ...
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Firefox opening blank (crashed) tabs in Ubuntu 18.04

I'm facing a strange problem with my Firefox. Sometimes, when I open a new tab from a link (or even a new tab), it just opens a blank page (or eternal loading page) and I need to click in the link ...
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20 views

How to disable clipboard function on TightVNC server

I looked at the manual of TightVNC Server but I couldn't find any option to disable clipboard function in order to block copy/paste between host machine and remote machine. I use TightVNC Server (...
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Does switching user account in Ubuntu 18.04 affects the on going work?

One of the c++ codes is running in one user account, what will happen if I change the user account? Will the code in my previous user account be still running or it will stop working?
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Strange results running an executable as root

I have an Geant4 c++ executable which acts in a very strange way. 1.- If I try to run it as normal user: user@MyPC:~$ ./myExec It runs, but doesn't visualize as it should. 2.- If I run it with sudo:...
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Ubuntu 18.04 bluetooth autoconnect not working

I have headphones Xiaomi AirDots. When I am turning on headphones they are connecting to my laptop (Ubuntu 18.04) but immediately disconnecting. After that when I trying to connect manually, it not ...

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