Questions tagged [ubuntu]

Free, open-source operating system based on Debian GNU/Linux. Ubuntu questions are on topic here, but if you prefer an Ubuntu-only audience there is Ask Ubuntu (http://askubuntu.com/).

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Ubuntu Laptop - Disable graphics card

I buyed a laptop with a good processor (Ryzen 9 4900H) and with a Graphic Card (RTX 2060) and this is a great machine, but I don't have enough battery life... I was wondering if there was a way to ...
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Google Chrome freezes during fullscreen due to hardware acceleration on Ubuntu 18.04

I am using Ubuntu 18.04 on Dell Vostro 3546. uname -a Linux vaishnavi-laptop 4.15.0-124-generic #127-Ubuntu SMP Fri Nov 6 10:54:43 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux Whenever I turn on hardware ...
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Stack jpg images from ffmpeg extraction using pipe or any other function?

I extract frames using command ffmpeg -i "rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov" -f image2 -vf fps=fps=1 ipcam_%04d.png I tile extracted frames horizantally ffmpeg ...
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Intel Wireless card not detected by Windows 10

I have an Intel AC-3168 wireless card. So it worked fine in Windows until I installed Ubuntu 20.10 as dual-boot. After restarting back into Windows, the wireless card was not detected. In device ...
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How to setup a virtual subnet?

Ubuntu 20.04 is installed on my machine. A network cable connect it to a network camera. I've installed three virtual machines via VirtualBox on it, one Windows XP and two Ubuntu 12.04. What I need is ...
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Renaming netatalk volume with Timemachine

I have set up avahi and netatalk on my NAS to provide a Timemachine share for my MacBooks. At the time of setting this up, I had no idea of the intricacies of how this works (neither from the Ubuntu ...
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How to install Unity tweak tool and themes in Ubuntu 20.04?

I'm using Ubuntu 20.04 Desktop, and I'm still using apps that do not work in gnome (my VPN for example.) I've installed Unity 7.5 as my window manager, and everything works, but the theme is not my ...
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ssh localhost: Permission denied (publickey) Ubuntu on WSL2

Previously asked this question on askubuntu.com and unix.stack but I'm getting quite desperate so I'm asking here again: I'm having trouble "sshing" to localhost and getting a permission ...
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How to remove file assosiations for particular file types

How can I remove file associations in Kali Linux. I accidently made my firefox download file with .part extension open with video player as default. I looked in the /etc/xfce4/defaults.list but it is ...
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WSL2 start X-Server from Bash Script

I have installed WSL2 with Debian 20.04 LTS and VCXSrv on my Windows 10, using the Bash Agnoster Theme. When I try to launch VCXSrv from my .bashrc with "/mnt/c/Program Files/VcXsrv/vcxsrv.exe&...
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Freshly Installed Ubuntu 20.10 freezes abruptly with HP pavilion - AMD Ryzen 5 4600H - Nvidia Graphics 1650

I installed ubuntu 20.10 on HP pavilion laptop in dual boot with windows 10 home. I am able to login to ubuntu but it randomly freezes after some time and I need to do a hard reset to restart. The ...
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Is it safe to migrate a NVMe SSD to a new computer?

I'm running Linux Mint 20 from a Samsung NVMe SSD on a Intel system (Broadwell CPU, H97 mainboard). My plan is to make the switch to a AMD Ryzen system. I checked the kernel compatibility with the new ...
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Port Forwarding not working on Ubuntu system with Skyworth residential router

I am working on Ubuntu 20.04 . I enabled port forwarding on my router as follows : With a static local IP address configuration as follows : Following the instructions here : https://portforward.com/...
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USB flash drive not functioning after attempt to create Ubuntu boot with Rufus

I got some errors while attempting to use Rufus from Windows 10 to set up a flash drive to boot Ubuntu. Foolishly, I did not write them down. This flash drive is, for what it's worth, new; I got this ...
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Can't revoke GPG key on Ubuntu keyserver

I am trying to revoke a GPG key on the Ubuntu keyserver. I have imported the revocation certificate into my GPG keychain and have used gpg --keyserver http://keyserver.ubuntu.com --send-key ...
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can I save my install after “ubuntu boot failed”

I upgraded to the new LTS version on my laptop and after the laptop died due to running out of battery I get: ubuntu boot failed screen with OK button highlighted. it does not show the GRUB screen at ...
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Dns using BIND9 and DHCP: no address records

I am using bind9 to configure a simple server, but when I try to execute named-checkzone mired.org /etc/bind/db.mired.org I got via console, NS 'asterix.mired.org' has no address records A or AAAA ...
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How to Reinstall missing apps and Packages after backup restored via deja dup backup tool in ubuntu 20.04

Hi all, I have Ubuntu 20.04 and I made a backup via deja dup tool, choosing main /home directory. and then I wiped the whole disk and partition and re-install ubuntu 20.04 again. After I restoration ...
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sslstrip ImportError: No module named twisted.web

I can't get sslstrip to work... When I run sslstrip I get this: Traceback (most recent call last): File "/usr/local/bin/sslstrip", line 27, in <module> from twisted.web import ...
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WiFi connection - can ping but can't browse

I installed Ubuntu Desktop 20.04 on an old Intel NUC and I'm experiencing a weird behavior - when connected to my router via WiFi, I can't browse the internet. After reading other answers for similar ...
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How to get package name via an executable command name in Ubuntu

I know in CentOS/Fedora, I can find out package name via the following command: dnf provides <executable name> but what command in Ubuntu will do the same?
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windows 8 + samba ubuntu 20.04 lab issue

I just spun up a ubuntu server 20.04 vm and am able to see it on my network at 192.168.1.xxx and I've enabled samba Now i've got a few shares setup: Share 1: user home folders Share 2: users on ...
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Infinite reboot loop “System BootOrder not found” after Windows 10 install and Ubuntu install

After wiping a disk, installing Windows 10, then installing Ubuntu with Grub, I experienced an infinite reboot loop with this error message (displayed less than 0.5 second, hard to read!): System ...
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How to synchronise audio with random= video filter

The ffmpeg random= video filter shuffles frames randomly in chunks (or something along those lines, but the audio stays exactly the same (obviously, because it's only a video filter) What I want to ...
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mount: permission denied in LXD container with /bin/mount hugetlbfs /dev/hugepages -t hugetlbfs -v

On Ubuntu 18.04 I can install LXD apt install lxc1 lxd lxd-client, create a container lxc launch images:centos/7 mycontainer and enter it using lxc exec mycontainer bash. In the container I noticed ...
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WSL can't access disk mounted *below* a drive letter

A Win10 host, with WSL 2 running Ubuntu 18.04, has an SSD mounted as drive path (C:) \2 in Disk Management. (This was to quickly "grow" my C: SSD for software that insists on being ...
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Disabling ssh autologout in Ubuntu 18

We have ~20 VMs running Ubuntu 18.04.2 in our freshly deployed K8s cluster here and each of them keeps closing my idle ssh sessions in mere minutes. Hence 2 questions to stop this disaster: (1) What ...
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Ubuntu 20.04 does not connect to Home wifi specifically

Ubuntu 20.04 does not connect to my home wifi while it connects to other wifi networks without any problem. Other devices also connect to my home-wifi without a problem. I am running a dual boot on ...
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`systemctl --user disable` for distro-shipped services?

I ran systemctl --user disable tracker-miner-fs.service expecting to see some changes in the filesystem and in the status output, but XUb ~$ systemctl --user disable tracker-miner-fs.service XUb ~$ ...
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Do I have to recompile ffmpeg in order to enable a new library?

I want to add the frei0r filter library to my existing ffmpeg installation on Ubuntu, this is my current configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay -...
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Getting -bash errors in Ubuntu 18

I am using Ubuntu for a current project as well as FSLeyes. I have done what I need in FSLeyes and switch over to Ubuntu to run commands. I am trying to get the file pathway inserted so that the ...
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Why does my bootable OS get stuck at the welcome screen sometimes?

This is extremely frustrating. I have several live USBs... Ubuntu 20.04 Xubuntu 20.04 LTS Xubuntu 18.04 LTS Hiren's boot CD (usb) Windows 7 installation media They all freeze at the logo screen ...
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Access dual boot ubuntu from Mac boot

I really need to get into my dual boot for ubuntu on my mac and used to just have to turn on the laptop to get into it. When I wanted to use mac OS i would have to press alt and pick between my ...
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Ubuntu systemctl service fails with: Main process exited, code=exited, status=1/FAILURE

I am writing a python script that subscribes to some MQTT topics to localhost MQTT broker and when a message is pushed, the script will call a function in another script on the same directory to load ...
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Ubuntu not giving root permissions to file, works on debian

I'm trying to make a program a privileged program by doing the following: sudo chown root sudo chmod u+s So now whenever someone runs , that user will be running that program with root privilege. ...
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Where should I put a log file from my web application running as non-root user?

I make server applications in C# / .NET Core. They are both web applications and WebSocket services. I use Apache as reverse proxy to make them accessible from the Internet and to provide SSL ...
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What should I add to hosts file to be able to access an http server that binds only on ipv6 address?

I have setup a rocketchat server on docker. It binds only to ipv6. To verify that I can access it, I use: //NOTE: xyzf is just a replacement $> nc fe80::ba27:ebff:fe2a:xyzf%eth0 3000 GET / and ...
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Application on remote computer * requested access to the x server

Using MobaXtrem to connect from my windows machine to an Ubuntu v16 remote server. I sometimes leave the connection active in the background while I'm away or working on other stuff. For the second ...
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Ubuntu 20.04 WSL2: Accidently changed root user to nonexistent shell

While trying to change my default shell from bash to fish on WSL2 Ubuntu 20.04, I royally messed up and accidentally used sudo chsh /bin/fish <user>. I'm assuming there was no such thing as /bin/...
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L2TP VPN connection is failed after reseting the BIOS on Ubuntu 18.04.5 LTS

During the L2TP VPN connection, I get the following error Activation of network connection failed. All credentials are valid since I can connect to the VPN using the Windows machine. The connecting ...
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Moving data on dual boot

I installed ubuntu on my computer and I still have it on my computer windows 10. How can I transport files from windows 10 to ubuntu? (I want uninstal windows) I have just only one SSD in this ...
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Remove linux-image, grub etc from a chroot (Debian / Ubuntu)

I'm trying to create a chroot (later to be squashfs'd) from a linux installation. As such I'd like to remove the linux kernel, grub and the like. However, apt purge-ing the last linux image keeps ...
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Triple boot Ubuntu, Kali and Tails from USB with persistent home directories

I would like to have a USB flash drive from which I can boot live systems of Ubuntu, Kali Linux and Tails OS with all of them having a persistent part, where I can save settings and files to. If it is ...
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How can I find correct mtu value for my ubuntu vpn server

I tried to install wireguard openvpn softethervpn to my ubuntu vpn server. I checked mtu values on my windows 10 computer and android phone both have 1500 mtu value. And mtu value on my vpn server is ...
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Why is my Ubuntu Installation taking more space than actual size

My installation of ubuntu is taking 13.7 GB when seen from Windows Settings, but when I ran ncdu - -exclude /c It shows only 4.7 GB is in use. Where is the rest of the space utilized. windows ...
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Is it safe to assume that when bootin a desktop computer from a flash drive no residual files stay on the computer's RAM and hard drives?

Does booting (not installing) a desktop computer from a flash drive simulate an airgapped environment so as to perform highly-sensitive operations, assuming that the desktop computer doesn't have a ...
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why does this anacron job run hourly, not daily?

I'm running zulip on a virtual private server, and have created a script backup-zulip on my laptop (with ubuntu 20.04) to back up zulip via ssh. I want to run this script daily, so I put the line @...
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379 views

Why do files disappear from an external USB hard drive when moved between Ubuntu servers?

Files saved on an external hard drive disappear when that drive is mounted to another computer. I have two Intel NUCs running Ubuntu 20.04 LTS server in separate physical locations, each with a 2TB ...
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Is it possible to record multiple Xvfb screens with audio seperatly?

We have some web video confrences. I am using Ubuntu 20.04 I want to record them by opening them in chrome and recording it using ffmpeg. each confrence opens in seperate Xvfb screen and I want to ...
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How to patch this source code with git (under Ubuntu 16.04)?

The full description of the task is as follows: 1.Use git to download the linux kernel source code from kernel.org 2.Use git to patch the kernel source code that you downloaded 3.Compile(or build) the ...

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