reducing activity's questions

currently top of top looks more or less like this:

    PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND                                                                                              
 160932 username  20   0  236684 222504   6912 R  99,3   0,7  58:14.16 python3                                                                                              
   6353 username  20   0  633904 523992   6656 R  99,0   1,6     13,39 python3                                                                                              
  18092 username  20   0  393320 369180  11264 R  39,4   1,1 154:58.37 python3                                                                                              
 149778 username  20   0 3975792 800884 301444 S  14,6   2,4  18:42.82 firefox                                                                                              
 168196 username  20   0 2544432 181284 112904 S   7,0   0,6   0:08.15 Isolated Web Co                                                                                      
   2065 root      20   0 1547428 353628 258444 S   3,3   1,1  63:27.48 Xorg                                                                                                 
   3103 mateusz   20   0 1206696 104704  39056 S   0,7   0,3   1:19.68 lxqt-panel                                                                                           
     53 root     -51   0       0      0      0 S   0,3   0,0   7:51.72 irq/9-acpi                                                                                           
    834 root     -51   0       0      0      0 S   0,3   0,0   9:44.32 irq/147-iwlwifi                                                                                      
   1410 root      20   0  427404   4992   3968 S   0,3   0,0   3:00.38 thermald   

I know I can use ps -fA | grep python to distinguish python processes and use say ps -fA | grep 160932 to find one of top processes consuming my resources.

But how can I display it right in top? Or how can I get top-equivalent supporting this, preferably some relatively standard tool?

I want to disable automatic screen lock in Ubuntu 24.04.

In my case it is both annoying and pointless as it is a VM.

I want to do it from CLI as I expect to execute it for each Ubuntu VM that is not headless.

Any idea why some .jpg get QGIS as thumbnail? And how to fix it?

I am using PCManFM-Qt 1.4.1 and had similar problem already on Lubuntu 20.04. It is still happening on a brand new Lubuntu 24.04 install.

I set default opening program already and it works fine file --mime-type IMG_20250302_093435.jpg shows image/jpeg in ~/.config/mimeapps.list qgis is only under application/geo+json=org.qgis.qgis.desktop; and application/json=org.qgis.qgis.desktop; I deleted /home/mateusz/.cache/thumbnails just in case xdg-mime query default image/jpeg shows org.gnome.eog.desktop exiftool IMG_20250302_093435.jpg has entry Thumbnail Image : (Binary data 49792 bytes, use -b option to extract) - no idea is it indicating anything bad

exiftool -b -ThumbnailImage IMG_20250302_093435.jpg > extracted_thumbnail.jpg extracts 100% fine image

I have not disabled thumbnails.

In settings I see no options to edit it. How it may be done?

note that it is not a duplicat of How do I edit applications panel menu in Lubuntu? as it refers to ancient Lubuntu version and both question and answer is not relevant anymore

There is notify-send --app-name="app name" "summary" "body body body https://askubuntu.com/questions/ask" but it shows pop up that does not allow even copying text.

And forget about ability to have working link to website or filesystem location.

Is there any standard way to do this? Or would I need to implement own GUI for that?

lsb_release -a shows

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 20.04.6 LTS
Release:        20.04
Codename:       focal

On my VM a significant space of space is eaten by /var/lib/snapd/snaps/

-rw------- 1 root root      4096 mar 16  2023 bare_5.snap
-rw------- 1 root root  66547712 sie 23 19:41 core20_2015.snap
-rw------- 1 root root  67014656 sty 15 18:15 core20_2105.snap
-rw------- 1 root root  77713408 sty 15 18:15 core22_1033.snap
-rw------- 1 root root  77492224 sie 30 00:33 core22_864.snap
-rw------- 1 root root 366682112 sie 23 19:42 gnome-3-38-2004_143.snap
-rw------- 1 root root 509100032 sie 23 04:31 gnome-42-2204_126.snap
-rw------- 1 root root 521121792 sty 15 18:16 gnome-42-2204_141.snap
-rw------- 1 root root  96141312 mar 16  2023 gtk-common-themes_1535.snap
drwxr-xr-x 2 root root      4096 gru  1  2022 partial
-rw------- 1 root root  42827776 wrz 19 07:38 snapd_20092.snap
-rw------- 1 root root  42393600 sty 15 18:15 snapd_20671.snap
-rw------- 1 root root  12922880 maj 25  2023 snap-store_959.snap

A lot of that looks like duplicates (core20_2015 and core20_2105 and core22_1033 and core22_864)

snap help snap help --all snap help --all|grep temp snap help --all|grep clean failed to reveal solution.

Is there some proper way to remove this apparent duplicates?

Sadly, in this case getting rid of snaps entirely is not viable as VM is supposed to mirror production (and there more important things need to be done than purging snap infestation).

snap --version
snap    2.61.1
snapd   2.61.1
series  16
ubuntu  20.04
kernel  5.15.0-84-generic

I prefer network to setup itself when I start computer, but I prefer to boot earlier and have network connect while I type my password and so on.

Sadly, according to systemd-analyze critical-chain I am waiting for NetworkManager.service startup during boot.

Is there a way to change that so that it still does its network things and it is not delaying boot?

graphical.target @8.083s
└─multi-user.target @8.083s
  └─postfix.service @8.075s +7ms
    └─postfix@-.service @3.904s +4.169s
      └─network-online.target @3.880s
        └─network.target @3.880s
          └─NetworkManager.service @3.495s +384ms
            └─dbus.service @3.492s
              └─basic.target @3.472s
                └─sockets.target @3.472s
                  └─docker.socket @3.469s +2ms
                    └─sysinit.target @3.464s
                      └─snapd.apparmor.service @3.131s +332ms
                        └─apparmor.service @2.990s +136ms
                          └─local-fs.target @2.989s
                            └─run-snapd-ns-cups.mnt.mount @5.417s
                              └─run-snapd-ns.mount @4.544s
                                └─local-fs-pre.target @528ms
                                  └─keyboard-setup.service @376ms +152ms
                                    └─systemd-journald.socket @361ms
                                      └─system.slice @354ms
                                        └─-.slice @354ms

I have folder that apparently has millions of files inside it.

As result, dir command is running for minutes already without displaying anything.

I checked dir --help and tried to search for solution.

How can I list files in category - with streaming, so command starts showing something quickly also if folder has millions of files?

I have no idea what is in the affected folder.

top is showing that some python script is using all computer resources

Sadly, I have more that one python scrip being running. How can I identify which file it is being run from?

I obtained PID using top command

Are there proprietary elements of Snap server? Is it possible to run Snap-based distribution independently of Canonical?

I am quite disliking Snap for multiple reasons (one of things that I like most on Linux is that I can install/uninstall things with apt-get, snap does not have even decency to provide direct help on snap upgrade).

But the most worrying thing that I heard is that Snap has proprietary elements, making it fully Canonical-controlled.

See for example https://www.techrepublic.com/article/why-canonical-views-the-snap-ecosystem-as-a-compelling-distribution-agnostic-solution/

Martin Wimpress, engineering manager for Snapcraft at Canonical at that time:

Snap store is proprietary

https://www.happyassassin.net/posts/2016/06/16/on-snappy-and-flatpak-business-as-usual-in-the-canonical-propaganda-department/

the server end (the 'app store' bit of the equation) is closed source, and Canonical have been refusing to tell anyone how to run their own 'app store' (...) it is entirely controlled by Canonical

(and also describes how Canonical was lying about Snap)

But infoboxes in https://en.wikipedia.org/wiki/Snap_(package_manager) list open source licenses.

What is going on? Have they released Snap store as open source? Or is Wikipedia article incomplete/damaged by Canonical employees?

I am quite worried, especially given that Ubuntu started making basically impossible to avoid Snap on Ubuntu. On the other hand I would prefer to have good reasons to switch Linux distribution, not just based on outdated blog posts.

For example, I have a ~/.config/libreoffice/4/user/autocorr/acor_en-US.dat file. It isn't plain text; opening it as text gives back gibberish.

How can I open it?

sudo apt-get install chromium-browser for some reason installs not a proper apt-get package but is installing the chromium snap.

I am aware that blocking such installs will not magically establish a maintained package, and would result in an installation failure. But I prefer to get error and install manually - from source or in unlikely cases from snap.

I want to never install anything using snap (for start, due to Snap Store closed-source practice). Especially not silently when I install using apt-get.

How can I disable snaps in gnome-software centre? is not answering my question as I want to get rid of snap infestation in apt - not in gnome-software-center.

I have a Dell Latitude 7480 laptop with preinstalled Windows 10.

I installed Lubuntu 20.04 on it, with dual booting.

Things worked fine until I tried attaching an external monitor (that worked perfectly fine with my ancient Lenovo G550 laptop with Lubuntu 20.04).

I discovered that with attached screen latop starts freezing and flashing screen. GRUB menu appears as usual and starts countdown from 10.

After 2 seconds (when it reaches 8) laptop screen flashes black screen, GRUB appears again but

• it stops reacting to a keyboard input
• continues flashing black screen every few seconds
• countdown freezes
• neither Linux nor Windows boots

There is no error message at all - so I have no good terms to google for and neither DDG nor Google nor asking on Lubuntu Support telegram channel helped.

As workaround I can remove HDMI cable, select OS in GRUB menu and reattach it (attaching too early freezes boot, but attaching it too late causes Windows to not detect monitor at all).

Using screen after boot:

1. With Windows 10 it worked fine (except extremely annoying interface to change screen settings)
2. Screen refused to work at all in Lubuntu until I installed Nvidia Drivers ( How to install Nvidia driver in Ubuntu 18.04? was still mostly applicable )

There is no error message at all - laptop screen flashes black after about 2 seconds of GRUB screen and it stops reacting to a keyboard input.

I am primarily looking for info what is the proper method of diagnosing GRUB issues, how GRUB can be updated safely and how can I get rid of this problem.

To avoid XY problem: yes, I need Windows OS. I need it to file taxes using some insane program distributed as PDF file that is not openable by anything on Linux (and even if I would find workaround for this specific file it will likely happen again).

Workaround: remove HDMI cable as system boots, attach it immediately after GRUB stage. Yes, it is ridiculous and I want to stop this.

More info:

• I never tried booting with monitor attached before I installed Linux (maybe problem was happening also while it was just Windows?).
• Problem is not happening with HDMI cable attached and not connected to an external display.
• Problem is happening with a different HDMI cable
• Happens with Philips 227E QHA 1920x1080
• yes, my old laptop currently has no GRUB (though it used to have one in past...)

I have monitor and laptop screen and have a problem with the "Show desktop" function.

Laptop screen is showing widget that should stay for all the time. Main monitor is used normally.

Whenever I use keyboard shortcut (windows key + d in my case), all windows will be hidden but I only want to hide all the windows on the specific monitor.

Is this possible?

Question similar to https://superuser.com/questions/200945/how-can-i-make-the-show-desktop-function-only-hide-the-windows-on-a-specific-m, with notable difference that I ask about different OS.

I know that there are some files /etc/gnome/defaults.list that store mime associations and are in format that should make editing them possible.

But I am looking for a way that will handle at least one of following problems

• this file is in format that is reasonable to parse. Still, using API that somebody made and hopefully tested will save some time and problems with bugs
• it would be great to have API aware about location of that file depending on OS version, OS etc. Even crashing with "this is not supported" would be preferable to script editing something that is no longer used

I want to fully automate my installation of Ubuntu - setting file associations to correct one is intended to be part of that.

Even automated/semi-automated (like documentation) way to find place storing file associations would be welcome.

how can I change file association globally? mentions /usr/share/gnome/applications/defaults.list, /usr/share/applications/defaults.list and /usr/share/applications/mimeapps.list See also Which default.list should I modify for default applications and what are the differences between the two? (so I would prefer to automate at least locating the file)

I am using package manager to handle updates without manual reinstallation.

I installed Sublime as recommended in How do I install Sublime Text 2/3? with:

sudo add-apt-repository ppa:webupd8team/sublime-text-3
sudo apt-get update
sudo apt-get install sublime-text-installer

My user settings, after change recommended in https://forum.sublimetext.com/t/disable-update-available-pop-up/1381 are following:

{
"font_size": 11,
"ignored_packages":
[
"Vintage"
],
"tab_size": 3,
"update_check": false
}

Despite this on every Sublime Text start I am attacked by "A new version of Sublime Text is available, download now?"

How can I get rid of this obnoxious popup?

I know that it goes away after ppa is updated and I apply upgrade - but after every release I have about week of pointless, unremovable message spam.

I added a script to autostart (using Default applications for LXSession). Later, I moved the folder containing the script.

As result, the autostart command was silently failing.

How can I enable warning messages about failed autostart commands?

I am downloading data spread among multiple files that don't change once published.

Therefore --timestamping is not good enough, because it is constantly checking whatever resource is changed, which is, in my case, completely pointless.

--no-clobber would fit perfectly. Unfortunately it doesn't work with --convert-links for some reason.

Both --no-clobber and --convert-links were specified, only --convert-links will be used.

I hoped that --backup-converted would help but it changed nothing (it works for --timestamping.)

Why wget --convert-links --backup-converted --no-clobber --wait 1 https://example.com ignores --no-clobber and how could it be fixed?

I know that I can use parameters (with aliases or apt.conf I can even make it permanent) to skip this steep.

But I still want to be warned about major amounts of used disk space, what seems to be purpose of this function.

The problem is that I and apt-get have different opinion what is major amount of disk space

• for me it would be over 200MB.

And apt-get

• well:

  After this operation, 9805 kB of additional disk space will be used. Do you want to continue? [Y/n] y

I am never using Caps Lock, it is pressed only by mistake. How can I fully disable it? Preferably during system start, so login menu will be also affected.