I connect to the internet at public sites, usually my local library, which involves a network login page.
My problem is that before that can happen, the network xfinity often hijacks the login process by connecting itself to my laptop.
How can I permanently ban xfinity network from connecting to me. I use Network Manager on Lubuntu 24.04
Until now, Snap was used in Ubuntu to install specific applications, such as Firefox, but those applications and snapd could be removed (and the applications could be replaced by packages, in some cases, such as those from Mozilla, or with Windows apps running in wine, such as 7-Zip).
Online, I've read that various components intrinsic to Ubuntu 26.04 are using snapd, and that it no longer can be removed simply. Is that the case, or is it feasible to remove snapd, still?
After connecting a new Bluetooth keyboard to my desktop computer with Ubuntu 24.04.4 LTS, I removed the new keyboard from the Bluetooth devices screen by telling Ubuntu to ignore it (by mistake, I now see). Now it's ignoring it and won't discover it anymore.
What would you suggest I do to fix my mistake and let it discover the new new keyboard again?
Just did a fresh install of Ubuntu 24.04.4 LTS and there is no HDMI sound out device listed to select for sound. Only "Digital output (S/PDIF) - USB Audio and HID" and "Analog Output - USB Audio and HID".
Did a bunch of digging, and tried any potential solution I could locate from updating intel drivers, to installing/using pulseaudio, and any other troubleshooting steps I could find. Even swapped out HDMI cable for a new one.
Also, for whatever reason, I can't get a command line listing of devices.
Still not seeing HDMI as a sound output option and sound out remains elusive.
At wits end.
Note that the HDMI audio works just fine for other devices connected to the monitor.
I have created a simple Java application (Spring MVC with one REST service) and I need to perform high-load testing after deploying it on Ubuntu 24.04.2 LTS.
I have already done some optimization of both the application and the operating system, and I am now achieving roughly the desired throughput and latency during testing. However, I’m not confident that my testing approach is entirely correct.
I understand that to simulate more realistic traffic, requests should be generated from multiple client machines. In my case, I only have one client (my laptop) and one server (another laptop), connected via a 1-meter Ethernet cable.During testing, I generate a large number of HTTP requests, and the packet flow for each request looks like this in Wireshark (see screenshot below. Total packets size is 1049bytes for 1 http request. I also use virtual IPs to workaround limit with ports).
For now, I’ve managed to achieve throughput of up to 100,000 requests per second(average wall clock time since Java HttpClient::send is invoked and after response synchronously received), given that both laptops use Ethernet cards with a maximum speed of 1 Gbps.
At a high level, I understand the TCP communication between one Ubuntu host and another as shown in the diagram (see screenshot).
I would like to also point out that I understand the difference between parallel and concurrent requests well.
My question is:
Is there anything in the Ubuntu (Linux) kernel—such as buffering, caching, or other optimizations—between receiving the initial TCP SYN packet from the client and sending the final response, that could artificially increase the number of requests per second when testing from a single client?
In other words, if I were to generate the same total load but distribute it across 10 different client machines, would I observe significantly lower throughput and why?
Or more specifically:
Are there any optimizations in the network stack that depend on using the same client IP address and port?
For various reasons we might need to move from FreeBSD (VM-ware) to Ubuntu (KVM).
As we use a lot of large tables with ip addresses stored in textfiles, which we load into FreeBSDs packet filter (pf), we are looking for similar solutions in Ubuntu, if there are any.
The text files contains over 900 000 ip adresses in total, to block.
Is this possible to achieve in Ubuntu with IP-Tables?
If so, what's required and are there any examples?
We are waiting for Ubuntu 26.04 LTS (Resolute Raccoon), and it's going to be shell based web and DB server.
Thanks,
Is it possible to build a user-land apparmor profile? I have an Electron app, and a bunch of users that prefer installing their apps in their home rather than in the root. Unfortunately, running the Electron app requires an apparmor profile because of the sandbox, and I was not able to find a way to build such a profile in user-space, I necessarily have to install something in /etc.
Is it correct that it is basically impossible to install an Electron app without admin access on Ubuntu? :(
I am using Ubuntu for some time, but I am not expert in Linux. I installed FreeFileSync on Ubuntu 24.04 LTS. After the installation I could see many folders on my desktop. How to remove these folders?
I have more than one WiFi adapter installed on my machine. They're always shown in the same order in WiFi settings no matter which one is actually connected. See the picture below.
Is there a way to change the configuration so that the WiFi adapter that is connected to the WiFi network is displayed first in Settings?
I'm trying to install Ubuntu 24.04 (latest) on Lenovo ThinkPad L15 Gen 3 (AMD), but I can't. I first had Windows 11 and no usb, so I tried grub2win and unetbootin, both failed. I found a usb stick and ran:
sudo dd if=ubuntu-24.04-desktop-amd64.iso of=/dev/sdX bs=4M status=progress oflag=sync
I entered BIOS and changed secure boot to OFF. I inserted usb stick and installed by erasing disk. All seems fine. But after restart into Ubuntu I remove the usb stick and all buttons, all icons, vanishes. i cannot open any programs.
I force power off and back on. Now Windows 11 and Unetbootin comes up. I restart and enter boot menu. i select Ubuntu, but the screen just flashes, nothing.
This link says my computer is certified to run Ubuntu https://ubuntu.com/certified/202204-30189 so why can't I?
UPDATE:
The Ubuntu installer installed on the usb stick, not on the sdd.
Whenever I copy a text or image and try to paste into an app (search bar or anyc place), the app I want to paste into freezes and the only solution is to force quit that app. Once this problem starts the only way to to stop it temporarily is to restart Ubuntu. Are there any solutions to this?
These are my Ubuntu and PC details;
I would like to know the experience of installing the release candidate for 26.04 LTS on a Lenovo ThinkBook. Would this make sense to do on a new laptop, and subsequently upgrade to the final release version after 23-Apr, using apt?
The laptop works fine with a 24.04 Live boot disk.
I'm using an Aspire 5742. App Center fails to load in Ubuntu 24.04.
ps -ef nets this line.
/usr/libexec/deja-dup/deja-dup-monitor.
I tried to reinstall Ubuntu 24.04 several times with the same result. Other apps installed during the installation are present and work. Only the App Center spends some time showing signs of "disk activity" and then nothing happens. I've been a happy Ubuntu user for many years, but i386 support seems limited.
I volunteered to set up a PC for my niblings to learn to code and so on. Windows sucks and I wanted to start the kids off right.
I had it installed and running fine, was up to installing Minecraft and Blender, but the WiFi was bad, so I moved the setup from my bedroom floor to the lounge by the router. After that turning it on left only a blank screen. I plugged the HDMI directly into the GPU and that gives me the GRUB menu, but when I select boot Ubuntu it doesn't work, and boot in recovery mode gives a wall of text that I don't understand and nothing else.
The only thing on the screen that appears to me to not be loading correctly is: nvme nvme0: missing or invalid SUBNQN field, but I don't even know if that's related and googling from there gets people talking in acronyms which I don't understand.
The PC is a refurbished computer from a reputable computer shop, and I replaced (not partitioned) Windows 11 and installed Ubuntu last month. I understand a new one is out this month, but I didn't want to wait. Please tell me what to do.
System:
The system crashes at boot without the nomodeset kernel parameter. With nomodeset system is stable but running in low resolution without GPU acceleration.
I've tried:
Persistent secondary issue: Invalid environment block error on every boot.
It's odd that I have to unplug the power cable from the socket to initiate power on. Unplugging the barrel connector at I/O does not allow the power button to function. Do you have any ideas?
I am using Ubuntu Studio 24.04.4.
Is it possible to assign a different IP for each user logging in into my laptop ?!
For instance, when userA logs in, the IP of my laptop would be 192.168.178.10
and when userB logs in, the IP of my laptop would be 192.168.178.20
That would be very handy since I am using the "filter" function of my FritzBox in order to filter websites accessed by my laptop...
Best
Vincent
Title says it all: Has rdist disappeared from 24.04?
I use rdist for a local backup scheme.
I have an Orange PI RISC v2 single board computer. This uses an Ubuntu RISC V OS. I am looking for IPTV players that work on RISC V Ubuntu?
I use KDE Connect between my phone and laptop on my University WiFi. Very often, the IP address changes and the connection stops working. I have to manually find the IP of the computer with the command ip address and put it in my phone and connect manually. The same thing happens when I connect to a different network.
Is there any way to automate the connection process? AFAIK know Apple's computers have some robust connection procedure with iOS devices.
I want to be able to do this for multiple computers with the same phone.
I'm using Ubuntu 24.04.1 LTS and have installed the LaTeX extension for LibreOffice with the tex-live full 2023.20240207-1 package. While the extension appears to be functioning and I can see its icons in LibreOffice, I'm encountering several issues. When attempting to insert a formula using this extension, the formula editor window fits my screen but I can't see the LaTeX icon below the preamble needed to generate the formula. Additionally, resizing the window is not possible. Does anyone know what might be causing this problem?
My sudo apt update output has warnings like the following:
W: https://ppa.launchpadcontent.net/apandada1/blanket/ubuntu/dists/noble/InRelease: Signature by key 95ACDEBD8BFF99ABE0F26A49A507B2BBA7803E3B uses weak algorithm (rsa1024)
W: https://ppa.launchpadcontent.net/apandada1/foliate/ubuntu/dists/noble/InRelease: Signature by key 95ACDEBD8BFF99ABE0F26A49A507B2BBA7803E3B uses weak algorithm (rsa1024)
W: https://ppa.launchpadcontent.net/apandada1/marker/ubuntu/dists/noble/InRelease: Signature by key 95ACDEBD8BFF99ABE0F26A49A507B2BBA7803E3B uses weak algorithm (rsa1024)
W: https://ppa.launchpadcontent.net/apandada1/numbat/ubuntu/dists/noble/InRelease: Signature by key 95ACDEBD8BFF99ABE0F26A49A507B2BBA7803E3B uses weak algorithm (rsa1024)
W: https://ppa.launchpadcontent.net/apandada1/xournalpp-stable/ubuntu/dists/noble/InRelease: Signature by key 95ACDEBD8BFF99ABE0F26A49A507B2BBA7803E3B uses weak algorithm (rsa1024)
W: https://ppa.launchpadcontent.net/libreoffice/ppa/ubuntu/dists/noble/InRelease: Signature by key 36E81C9267FD1383FCC4490983FBA1751378B444 uses weak algorithm (rsa1024)
W: https://ppa.launchpadcontent.net/mati75/gimp30/ubuntu/dists/noble/InRelease: Signature by key 3D7CDBD93E20A76CCB0B732792E8759D76F09DD6 uses weak algorithm (rsa1024)
W: https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu/dists/noble/InRelease: Signature by key 0AB215679C571D1C8325275B9BDB3D89CE49EC21 uses weak algorithm (rsa1024)
Some of these are my own PPAs (apandada1), and I want to increase their security. How can I do that? Do I have to generate a new GPG key and sign packages with that key?
Recently I have been using Launchpad's recipes to generate PPA packages and don't manually build (and then upload) them anymore. In that case, how to fix this issue of keys using weak algorithm?
The key is not even listed among my PGP keys. It is somehow generated by Launchpad to sign packages generated by Launchpad recipes.
I have Lenovo Legion Y530 laptop with 120GB nvme SSD drive and 1TB hard disk. The SSD drive originally had Windows installed. I formatted the 120GB SSD drive and installed UBUNTU 22.04 LTS no dual boot only single OS.
WiFi is not working after installation completes (during installation steps also wifi was not shown).
I did all updates, upgrade, and nvidia drivers from 'Additional Drivers' option of software & Updates.
No Luck!!!. :(
I set the system to suspend and after some time. When the system is brought from suspend mode wifi magically started working.
I tried several solutions available in google and also tried installing different versions of Ubuntu, nothings works.
Realtek wifi adapter: "lspci -nnk | grep 0280 -A3" command output image
RFKILL command output: "rfkill list all"
dmesg command output: "sudo dmesg | grep rtw" - Here you can find the wifi is brought after coming out from suspend mode.
lsmod command output: "lsmod | grep rtw"
I believe some setting has to be made during the startup of the system. if any one known any solutions help me out!!!
Thanks in advance :)
When i added
stty intr ^X
to my ~/.zshrc file it is always showing stty: 'standard input': Inappropriate ioctl for device on startup.
Please help, thanks in advance.
I'm having issues with an HP elitebook 840 G3. I cannot access information regarding the keyboard back light on Ubuntu 18.04
My keyboard back light works normally (with pressing Fn and F3), that's not the issue, issue is being not able to read back light level from software.
I looked at /sys/class/leds/ and there was nothing that could be keyboard backlight, there were only:
_hp::hddprotect_
_input3::capslock_
_input3::numlock_
_input3::scrolllock_
_phy0-led_
Can anyone help me understand where that device might be located so I could read data about it? In order to be sure the keyboard has back light and view/control its brightness level?
I have made my laptop double boot a few months again, with Ubuntu 18.04.1 . I have been working with okular to open pdf files (for the commenting option) but suddenly okular doesn't work anymore. When trying to open okular I get the following error:
Unable to find the Okular component: Cannot load library /snap/okular/39/usr/lib/x86_64-linux-gnu/qt5/plugins/okularpart.so: (libKF5JSApi.so.5: cannot open shared object file: No such file or directory)
I don't understand how to solve this problem. Okular was working fine until today and I didn't change anything to my ubuntu system in the mean time. Perhaps the problem comes from the fact that I have been working on windows the last few days and also used the windows ubuntu app.
How can I make okular work again?
How do I get rid of the automatically opening search feature on the desktop? I'm not sure what it's actually called. It's the box that pops up (in my lower right corner) when I press a key. It's a search option just for desktop icons, I think.
I am running vim 7.4:
andrew@athens:~$ vim --version | head -n 2
VIM - Vi IMproved 7.4 (2013 Aug 10, compiled Jun 16 2016 10:50:38)
Included patches: 1-1689
And I need to routinely type in the Euro symbol. How do I do this easily and efficiently?
I find Synaptic a rather convenient tool for browsing through the repositories looking what's in them but I prefer to use command line to install the actual packages (to let bash maintain history of what I have installed manually) and it annoys me that I can't use apt-get when Synaptic is running. I would also like to be able to use a nice GUI to browse remote repositories without attaching them. Does anybody happen to know a tool I might like?
I have been using dual-boot on a Lenovo Flex for about 3 weeks now with Windows 8.1 and Ubuntu 14.04.
Ubuntu started getting funny with unreliable connection (Wifi was connecting but not transfering data.) the same happened with cable
3 days ago it suddenly started to work fine for 1 hour then came funny again and accompanied by my keyboard not responding.
It works when I type my login but not once I am logged in. It works when I am under a guest session and it works with Windows.
There is no difference whether I use the on board keyboard or a USB keyboard. So it's not a hardware / driver issue.
Can anyone explain?
Update: Thanks for asking. Yes, I think the issue was raised following some update (although not immediately after) and yes, I have managed to run updates both via the updater and via the apt-get update command. Nothing changed even after reboot.
Regards
Thanks for asking and your input. Yes, I think the issue was raised following some update (although not immediately after) and yes, I have managed to run updates both via the updater and via the apt-get update command. Nothing changed even after reboot.
Replying to the question "Can you get to TTY with Ctrl+Alt+F1?" Nope1 The only key that works is the airplane mode one which is on F7. I can get to the terminal if I have prepared what I need to type beforehand with windows or another computer / phone then saving a Gedit doc...
A question: Would a restore be possible and if yes would it help? My data is on a separate partition which I can easily back-up via Windows. Tks
Gnome-Do is not running and impossible to copy / print-screen the list of applications to display here.
No possibility to use the terminal as Enter key does not work either...
I have 2 HDD drives in my computer. At the moment second drive is mounted as /media/storage.
How can I move my user data from /home to /media/storage/home?
Can I just move the data over there and then simply symlink it back?