I have a dashboard from Home Assistant and would like it to be shown as the desktop wallpaper/background using some web web browser (Firefox, Chromium) in kiosk mode.

How would I tell my Ubuntu 24.04/Wayland/Gnome to automatically start that browser upon user login and run it as desktop wallpaper?

I have checked https://wiki.videolan.org/VSG:Startup:Other/ (but it's empty) and searched this forum to no avail.

I installed Ubuntu Desktop 25.10 on my (aging) Dell Precision M4800 laptop today. The installation went fine (everything works: external monitor, KVM switchover to other laptop, sound, Bluetooth, all network cards, storage devices, streaming videos from Youtube, playing videos attached to Signal messages) but I can't play any local video files just sitting on disk like local .mp4 or .avi or .mov files. I have installed both ubuntu-restrictred-addons and ubuntu-restricted-extras and updated all software.

When double-clicking on a video file in the Files app of Gnome GUI it doesn't show anything, and via the terminal I run vlc <filename> which shows absolutely nothing - like the application is running but nothing is drawn on screen. See attached screenshot from the terminal.

I have tried the "stable" and "beta" channels of VLC in the package manager. There is no difference.

The laptop has the following GPUs:

• Intel HD Graphics 4000/5000 series integrated graphics card

• nVidia Quadro K1100M

ubuntu-drivers list returns nothing so I suspect the right drivers have been installed.

The only indication that something is wrong with the video driver is that in Settings -> Mouse and Touchpad the "Scroll Direction" graphics look quite funny like this.

How do I get local video playback working?

Hi:) I want to download fcitx5 fcitx5-qt fcitx5-gtk fcitx5-mozc, here is the code:

sudo apt install fcitx5 fcitx5-qt fcitx5-gtk fcitx5-mozc
[sudo] password for od: 
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package fcitx5-qt
E: Unable to locate package fcitx5-gtk

OS:24.04.3

Clean install on a new machine.

The installer asks whether it should connect to the internet to download additional stuff. Sounds nice... but if I understand correctly, no firewall is active at that point.

Is this safe enough? Research shows that attacks start within seconds after establishing an internet connection.

If it's not 100% safe, what would be the best I could do?

I want to write Russian text in LaTeX. I searched the web but did not find something which works.

Can anybody help me?

Thank you!

I have a server on Ubuntu 24.10 (oracular). Running sudo apt update results in various 404 errors, as far as I understand due to support of this version was discontinued. I've searched a bit for instructions on how to update Ubuntu (or switch to 24.04 LTS, not sure if it's ok to call this "update"), but all instructions that I find have bits like sudo apt update which no longer works in this case. What can I do?

Calling do-release-upgrade also tells "Your Ubuntu release is not supported anymore." Is it like I'm trapped, or is there a way to get an update and restore apt to work?

Is it safe to edit /etc/apt/sources.list.d/ubuntu.sources, like sudo sed -i 's/oracular/noble/g' /etc/apt/sources.list.d/ubuntu.sources?

PS Here's the full output of sudo apt update that I'm getting:

sudo apt update
Ign:1 http://security.ubuntu.com/ubuntu oracular-security InRelease
Ign:2 http://nova.clouds.archive.ubuntu.com/ubuntu oracular InRelease
Err:3 http://security.ubuntu.com/ubuntu oracular-security Release
  404  Not Found [IP: 2620:2d:4000:1::101 80]
Ign:4 http://nova.clouds.archive.ubuntu.com/ubuntu oracular-updates InRelease
Ign:5 http://nova.clouds.archive.ubuntu.com/ubuntu oracular-backports InRelease
Err:6 http://nova.clouds.archive.ubuntu.com/ubuntu oracular Release
  404  Not Found [IP: 2620:2d:4000:1::93 80]
Err:7 http://nova.clouds.archive.ubuntu.com/ubuntu oracular-updates Release
  404  Not Found [IP: 2620:2d:4000:1::93 80]
Err:8 http://nova.clouds.archive.ubuntu.com/ubuntu oracular-backports Release
  404  Not Found [IP: 2620:2d:4000:1::93 80]
Get:9 https://apt.syncthing.net syncthing InRelease [24.2 kB]
Error: The repository 'http://security.ubuntu.com/ubuntu oracular-security Release' no longer has a Release file.
Notice: Updating from such a repository can't be done securely, and is therefore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configuration details.
Error: The repository 'http://nova.clouds.archive.ubuntu.com/ubuntu oracular Release' no longer has a Release file.
Notice: Updating from such a repository can't be done securely, and is therefore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configuration details.
Error: The repository 'http://nova.clouds.archive.ubuntu.com/ubuntu oracular-updates Release' no longer has a Release file.
Notice: Updating from such a repository can't be done securely, and is therefore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configuration details.
Error: The repository 'http://nova.clouds.archive.ubuntu.com/ubuntu oracular-backports Release' no longer has a Release file.
Notice: Updating from such a repository can't be done securely, and is therefore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configuration details.

I'm reaching out because I’m genuinely stuck and could really use some guidance. I've been trying to install Kubuntu on my Windows machine, but along the way I made a few mistakes due to lack of experience, and now I’m unsure what state my system is in.

I originally had Windows installed. I attempted to install Kubuntu using UNetbootin, with the installer file located on my C: drive. Unfortunately the installation failed because the source and target were on the same drive. At the time I didn't fully understand the implications.

Since then I've spent a lot of time researching and trying to fix things on my own, but I've reached a point where I'm completely stuck. I've shared screenshots of my BIOS settings and the current situation to be as transparent as possible.

I need to get a working operating system again whether it's Kubuntu or Windows.

I need some help troubleshooting my system.

I can never suspend my laptop. It's always blocked by some file tasks that completed with no problems:

andy@Inspiron16:~$ gnome-session-inhibit --list
org.gnome.Nautilus: Moving Files (logout, suspend)
/usr/bin/google-chrome-stable: Download in progress (suspend)
org.gnome.Nautilus: Moving files to the Rubbish Bin (logout, suspend)
org.gnome.Nautilus: Moving files to the Rubbish Bin (logout, suspend)

GitKraken also tells me: File watching failed to start for this repository.

I increased the inotify max watches and instances, but it didn't help.
I'm running latest Ubuntu, normal usage and some development, nothing crazy.

I have a script that unmounts a filesystem and deactivates the associated LV for updating a snapshot. Since I updated the 22.04 server (and others to same level), when the umount takes place, the FS still shows (in LVM) as having files open - see below. As a result, the subsequent lvchange --activate n fails with an indication that the FS has open files/is busy - see below.

The only thing that seems to correct this is a reboot, but then the problem resurfaces in under 24 hours. I have tried the following checks to see what might be open/in use (none report back anything of consequence) - fuser/lsor/findmnt. FS in question is /epic/mst01/ below.

root@e-iris-trnb01:~# lvs
  LV           VG        Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ace1blv      ace1bvg   -wi-ao---- <170.00g
  ace2blv      ace2bvg   -wi-ao---- <170.00g
  ace3blv      ace3bvg   -wi-ao---- <170.00g
  epicaltjrnlv epicvg    -wi-ao----   18.00g
  epicjrnlv    epicvg    -wi-ao----   30.00g
  epiclv       epicvg    -wi-ao----   90.00g
  epictmplv    epicvg    -wi-ao----   10.00g
  ***mstlv        mstvg     -wi-ao---- <170.00g***
  plyblv       plybvg    -wi-ao---- <170.00g
  prepblv      prepbvg   -wi-ao---- <170.00g
  refblv       refbvg    -wi-ao---- <180.00g
  lv-epic_core ubuntu-vg -wi-ao----    5.00g
  lv-home      ubuntu-vg -wi-ao----    4.00g
  lv-swap      ubuntu-vg -wi-ao----    4.00g
  lv-tmp       ubuntu-vg -wi-ao----    4.00g
  lv-var       ubuntu-vg -wi-ao----   25.00g
  ubuntu-lv    ubuntu-vg -wi-ao----   12.00g
root@e-iris-trnb01:~# umount /epic/mst01
root@e-iris-trnb01:~# lvs
  LV           VG        Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ace1blv      ace1bvg   -wi-ao---- <170.00g
  ace2blv      ace2bvg   -wi-ao---- <170.00g
  ace3blv      ace3bvg   -wi-ao---- <170.00g
  epicaltjrnlv epicvg    -wi-ao----   18.00g
  epicjrnlv    epicvg    -wi-ao----   30.00g
  epiclv       epicvg    -wi-ao----   90.00g
  epictmplv    epicvg    -wi-ao----   10.00g
  ***mstlv        mstvg     -wi-ao---- <170.00g***
  plyblv       plybvg    -wi-ao---- <170.00g
  prepblv      prepbvg   -wi-ao---- <170.00g
  refblv       refbvg    -wi-ao---- <180.00g
  lv-epic_core ubuntu-vg -wi-ao----    5.00g
  lv-home      ubuntu-vg -wi-ao----    4.00g
  lv-swap      ubuntu-vg -wi-ao----    4.00g
  lv-tmp       ubuntu-vg -wi-ao----    4.00g
  lv-var       ubuntu-vg -wi-ao----   25.00g
  ubuntu-lv    ubuntu-vg -wi-ao----   12.00g
root@e-iris-trnb01:~# lvchange --activate n mstvg/mstlv
  ***Logical volume mstvg/mstlv contains a filesystem in use.***
root@e-iris-trnb01:~# lvchange --activate n -f mstvg/mstlv
  ***Logical volume mstvg/mstlv contains a filesystem in use.***
root@e-iris-trnb01:~# lvs
  LV           VG        Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  ace1blv      ace1bvg   -wi-ao---- <170.00g
  ace2blv      ace2bvg   -wi-ao---- <170.00g
  ace3blv      ace3bvg   -wi-ao---- <170.00g
  epicaltjrnlv epicvg    -wi-ao----   18.00g
  epicjrnlv    epicvg    -wi-ao----   30.00g
  epiclv       epicvg    -wi-ao----   90.00g
  epictmplv    epicvg    -wi-ao----   10.00g
  ***mstlv        mstvg     -wi-ao---- <170.00g***
  plyblv       plybvg    -wi-ao---- <170.00g
  prepblv      prepbvg   -wi-ao---- <170.00g
  refblv       refbvg    -wi-ao---- <180.00g
  lv-epic_core ubuntu-vg -wi-ao----    5.00g
  lv-home      ubuntu-vg -wi-ao----    4.00g
  lv-swap      ubuntu-vg -wi-ao----    4.00g
  lv-tmp       ubuntu-vg -wi-ao----    4.00g
  lv-var       ubuntu-vg -wi-ao----   25.00g
  ubuntu-lv    ubuntu-vg -wi-ao----   12.00g
timed out waiting for input: auto-logout

I recently tried to upgrade my Ubuntu system from the 20.04 to the 22.04 release, however while the upgrade was running, I logged out of my session as I had to leave my laptop at work overnight to complete the upgrade.

That got me stuck on the login screen. Either I got an authentication error without being able to enter my password or entering my password results in a yet endless loading.

I havd previously experienced a login loop, which I managed to escape by reinstalling the display manager and rebooting my computer, but I am afraid that rebooting during a system would break it.

If I remember correctly, I ran the upgrade through sudo apt update, sudo apt upgrade, sudo apt dist-upgrade, sudo apt-get autoremove and lastly sudo do-release-update, after some tweaking in the sources.list to comment out inaccessible links.

From the text terminal (CTRL + Alt + F3), neofetch shows that my computer is now under Ubuntu 22.04. It does not signal any Desktop Environment (which had happened during my previous login loop), and top -p 4801 shows me that jammy is currently the only running process, using 0% of the CPU.

My guess would be that the upgrade process is stuck on a confirmation step (and has been there the past 24 hours...).

Any ideas on how to get the upgrade done from there?

Today I installed Ubuntu 24.04, and I cannot see my Bluetooth devices. The terminal shows the device lsusb: Bus 001 Device 003: ID 2c4e:0115 Mercucys INC MERCUSYS Bluetooth Adapter (mercusys m550h), but it doesn't detect any other devices. I also downloaded bluez and blueman, but it not help me.

bluetooth version: 5.4
uname -r: 6.14.0-37-generic
mokutil --sb: Secure Boot enabled
OS: Ubuntu 24.04

I accidentally wrote exort instead of export when setting CL_ALL=en_US. What I was trying to do was switch it from Japanese to English, thx ahead!

Here is what I did:

export LANG=en_US.utf8
export LC_ALL=en_US.utf8
echo 'export LANG=en_US.utf8'>>~/.bashrc
echo 'exort LC_ALL=en_US.utf8'>>~/.bashrc
source~/.bashrc
bash: source~/.bashrc: No such file or directory
source ~/.bashrc
bash: 警告: setlocale: LC_ALL: ロケールを変更できません (US.utf8)
exort: command not found
echo 'export LC_ALL=en_US.utf8'>>~/.bashrc
source ~/.bashrc
bash: 警告: setlocale: LC_ALL: ロケールを変更できません (US.utf8)
exort: command not found

How do I fix this?

I am using a fresh install of Kubuntu 25.10. But after booting, I get a black screen. Then, I can press Ctrl+Alt+F3 to get a console. After logging in, I execute

startplasma-wayland

and the Desktop loads...
But without this manual procedure nothing happens and the screen stays black.

So my question is:
What breaks the automatism and how can I fix it?
And has it anything to do with the NVidia drivers (I'm using nvidia-driver-580-open)?

I cannot boot into my Ubuntu 22.04 machine (Dell OptiPlex 7050), and I repeatedly see the following message on a black screen:

You are in emergency mode. After logging in, type "journalctl -xb" to view system logs, "systemctl reboot", "systemctl default" or "exit"
to boot into default mode.
Press enter for maintenance
or press Control-D to continue. 

I know I am not the first one complaining about this message, but I cannot found a solution.

I have also seen this:

Reloading system manager configuration
Starting default target
Failed to start default target: Transaction for graphical .target/start is destructive (emergency.target has 'start' job queued, but 'stop' is included in transaction).

But the culprit may be the file system. I have run:

journalctl -xb

...and found several lines with:

blk_update_request: I/O error, dev sda sector...
Buffer I/O error on dev sda1, logical block...
(...)
ata1: EH complete
systemd-fsck[864]: fsck failed with exit status 4.
systemd-fsck[864]: Running request emergency.target/start/start/replace
systemd-fsck@dev-disk-by ... Main process exited, code=exited, status=1/FAILURE
(...)
A start job for unit ureadahead-stop.service has finished successfully

The command completes with:

A start job for unit ...service has finished successfully.

Cannot find anything unusual in /etc/fstab.

How to get out of this situation?

What is the file size limit for scanning large files with ClamAV? Is it possible to scan files as large as 20gb.

Thank you

I have a mac mini 2010 (4.1), with Ubuntu Desktop 22.04 and the temperature control doesn't work.

I tried installing mbpfan and it didn't work. I tried installing macfanctld and it didn't work. This is the result of sensors:

nouveau-pci-0500
Adapter: PCI adapter
GPU core:    810.00 mV (min =  +0.81 V, max =  +0.90 V)
temp1:        +84.0°C  (high = +95.0°C, hyst =  +3.0°C)
                       (crit = +105.0°C, hyst =  +5.0°C)
                       (emerg = +135.0°C, hyst =  +5.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Core 0:       +73.0°C  (high = +105.0°C, crit = +105.0°C)
Core 1:       +72.0°C  (high = +105.0°C, crit = +105.0°C)

applesmc-isa-0300
Adapter: ISA adapter
Exhaust  :      0 RPM  (min = 1800 RPM, max = 5500 RPM)
TA0P:         +51.8°C  
TC0D:         +74.0°C  
TC0G:         +70.0°C  
TC0H:         +73.2°C  
TC0P:         +67.8°C  
TC0p:         +67.5°C  
TCPG:         +73.0°C  
TH0G:         +60.0°C  
TH0P:         +47.0°C  
TH0p:         +47.0°C  
TM0G:         +75.0°C  
TM0P:         +67.5°C  
TM0p:         +67.5°C  
TN0D:         +75.8°C  
TN0G:         +67.0°C  
TN0P:         +65.8°C  
TN0p:         +66.0°C  
TN1D:         +84.0°C  
TN1E:         +84.0°C  
TN1F:         +85.0°C  
TN1G:         +90.0°C  
TN1S:         +85.0°C  
TNPG:         +70.0°C  
TO0P:         +48.0°C  
TO0p:         +48.0°C  
TW0P:         +56.5°C  
Tm0P:         +61.2°C  
Tp0C:         +48.8°C  

This is the error shown after I shutdown:

I am new at using linux, and I am currently using Ubuntu 20.04. I use Ubuntu via a external HDD(WD 1TB). The HDD is two years old.

Recently this error has been popping whenever I shutdown and the OS too is lagging.

Any help will be greatly appreciated.

Where is node_modules installed globally on Ubuntu 20.04 ?
It's not there in /usr/local/lib I want to get rid of globally installed webpack. I can't seem to locate it.

I'm using LightDM as a greeter.

I need to perform a command before the login screen. I've put a file called rotate.conf inside the /etc/lightdm/lightdm.conf.d folder. That file contains a command to rotate the second monitor (it is the only way to have it works properly).

I've tried different rows of code but it seems it doesn't read that instruction.

[SeatDefaults]
command=xrandr --output DP-0 --rotate left

I've tried even without the [...] and command= but without success.

I've also added the last line in user.conf

[UserList]
minimum-uid=500
hidden-users=nobody nobody4 noaccess
hidden-shells=/bin/false /usr/sbin/nologin /sbin/nologin
greeter-setup-script=/etc/lightdm/lightdm.conf.d 

What am I doing wrong?

I have troubles with installing MT4/MT5 under Ubuntu 18.04.2 LTS. I try installing different Wine/Gecko/Mono versions, installing winhttp etc. It always asking me for Proxy server details and the installation is crushing.

I also try changing repositories and any kind of other advise I googled, but still stuck on Proxy request.

Could someone help with advise on the matter? Does MT4/MT5 is supported at all under this Ubuntu release?

Thanks in advance

P.S. Edited: I had been asked to provide specific errors, however after I conduct all suggested solutions listed in the net I don`t get any - it just ask me for a proxy server details, which is a step not needed for MS. From what I found in the net the proxy server details request is the issue itself, it should not happens on the first place.

Briefly I am downloading any of the MT4/MT5 platforms available in the net (from several different brokers), locating them in some folder. Going to that folder by 'cd' command and executing 'wine xxx.exe' command. The program start installing and in one moment it request for proxy server details...

Resolved: If someone has similar problem - check this video - https://www.youtube.com/watch?v=VzgsruDTEuA Download the MT4/MT5 via PlayOnLinux! Then, you could create shortcut for the app - for me it looks like this one:

# !/usr/bin/env xdg-open
[Desktop Entry]
Version=1.0
Type=Application
Terminal=false
Icon[en_US]=gnome-panel-launcher
Exec=~/PlayOnLinux's virtual drives/metatrader4/drive_c/Program Files/MetaTrader$ wine terminal.exe
Name[en_US]=MT5
Name=MT5
Icon=gnome-panel-launcher

Finally it is about amendment of the server, ports etc.

Goodluck and cheers!

I am on Ubuntu 18.04 LTS and updated to the latest software. I have replaced hard drive of my laptop with an SSD. Original hard drive is fixed where the DVD drive used to be. Windows and Ubuntu both installed on the SSD. BIT folder resides on my original hard drive. BIT folder is just a randomly selected one. None on the hard drive partitions or SSD partitions allow me to use Cut, Move to or rename options. But the places on the side bar on the picture allow me to do so.

except the places in the picture below,

How to fix this problem.

Permission is set like this.

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda6 during installation
UUID=c8b94b00-5f20-45ce-95a2-450940d31e71 /               ext4    errors=remount-ro 0       1
# swap was on /dev/sda5 during installation
UUID=1a1cf76f-ffee-4437-b9df-e666e600ac87 none            swap    sw              0       0

I've been trying to install Ubuntu on my new Acer Spin 1 for a few days now and whenever it reaches a point it gets stuck and loops the same code over and over indefinitely. This lasts for hours:

/usr/lib/ubiquity/ubiquity/frontend/gtk_components/nmwidgets.py:xxx: Warning: Source ID xxxxx was not found when attempting to remove it.
GLib. source_remove(self.timeout_id)

/usr/lib/ubiquity/ubiquity/frontend/gtk_components/nmwidgets.py:xxx: Warning: Source ID xxxxx was not found when attempting to remove it
GLib.source_remove(self.rows_changed_id)

(The x's are a string of numbers that increase through each loop).

The stages it stalls on varies from 'installing grub package' to the more common 'Configuring linux-signed-image-generic (amd64)'.

I did end up getting it installed by setting up the partitions myself but that only led me to another issue where I'd receive the error 'No Boot Drive' on restart: No Bootable Device after Installing Ubuntu 16.04 - No Drives in UEFI BIOS settings ... I ended up attempting a reinstall to find a solution and now I'm back to where I started. They method I tried that was successful before no longer seems to work.

Please help.

I was trying to install UT99 as explained here and here. After downloading libraries I needed, I started to install the program, but later on I got the warning as in subject. I don't understand which is the problem, in other words, the phrase "Locale not supported C library" doesn't explain what is the error.

I try to watch inside my system as:

$ sudo locale -a
C
C.UTF-8
it_IT.utf8
POSIX

Then if type

$ sudo locale -a
LANG=it_IT.utf8
LANGUAGE=
LC_CTYPE="it_IT.utf8"
LC_NUMERIC="it_IT.utf8"
LC_TIME="it_IT.utf8"
LC_COLLATE="it_IT.utf8"
LC_MONETARY="it_IT.utf8"
LC_MESSAGES="it_IT.utf8"
LC_PAPER="it_IT.utf8"
LC_NAME="it_IT.utf8"
LC_ADDRESS="it_IT.utf8"
LC_TELEPHONE="it_IT.utf8"
LC_MEASUREMENT="it_IT.utf8"
LC_IDENTIFICATION="it_IT.utf8"
LC_ALL=

At this point I stopped my installation. Any advice?

Thanks

I am about to get Ubuntu 16.04 LTS on a netbook running windows 7 starter. It does not have a built-in CD-ROM, so I have an external Samsung CD-ROM. I am afraid it will not work with Ubuntu, unless I mount it. What is a good Linux command to mount my CD-ROM so it can work on my netbook when it gets Ubuntu?

I installed Ubuntu 16.04 on my Acer Aspire E5-573-347G, and I have not had any problems until I needed to use bluetooth.

The Unity bluetooth menu does not allows me to use any options, as can be viewed below.

The lsusb command returns this information:

Bus 001 Device 002: ID 8087:8001 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 006: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 002 Device 005: ID 1bcf:2c81 Sunplus Innovation Technology Inc. 
Bus 002 Device 003: ID 1c4f:0002 SiGma Micro Keyboard TRACER Gamma Ivory
Bus 002 Device 002: ID 2188:0ae1  
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

After that, I used rfkill list:

0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
1: acer-wireless: Wireless LAN
    Soft blocked: no
    Hard blocked: no

[Update 1] When I use thehcitool scan command, the system returns the following message: Device is not available: No such device

[Update 2] Output of command lspci -knn | grep Net -A2:

03:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)
    Subsystem: Lite-On Communications Inc QCA9565 / AR9565 Wireless Network Adapter [11ad:0803]
    Kernel driver in use: ath9k
    Kernel modules: ath9k

I'm starting airodump-ng from the aircrack-ng package (version 1:1.2-0~beta3-4 on 16.04) like this:

• Switch my WiFi device to monitor mode (creates new virtual interface mon0):

  sudo airmon-ng start wlp3s0
  

• Start the dumping:

  sudo airodump-ng mon0
  

Now I'm running the Unity desktop and using the default network manager indicator. If I click on that and remove the tick at Enable Wi-Fi, my session immediately crashes and I'm thrown to the log-in screen. All running applications were killed.

Additionally, if I suspend the notebook after that and wake up again, I must enter my password twice, as there appears one additional dialogue window asking for my password to unlock or offering to switch the user. After I enter my password, I get to the ordinary lock screen which asks me again.

Is this all a bug in airodump-ng, or is there more about it, am I missing a driver, configuration or anything else that could serve as workaround to avoid this in the future? An answer describing how to not allow to disable the WiFi while airodump-ng is running would also count as valid workaround.

Update:

Here is some information about my WiFi adapter:

$ iwconfig
wlp3s0    IEEE 802.11abgn  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=off   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

$ lspci | grep -i wireless
03:00.0 Network controller: Intel Corporation Wireless 3165 (rev 81)

$ inxi -n
Network:   Card-2: Intel Wireless 3165 driver: iwlwifi
           IF: wlp3s0 state: down mac: 08:d4:xx:xx:xx:xx

$ sudo lshw -c network
  *-network
       description: Wireless interface
       product: Wireless 3165
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlp3s0
       version: 81
       serial: 08:d4:0c:b3:0b:19
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=4.4.0-24-generic firmware=16.242414.0 latency=0 link=no multicast=yes wireless=IEEE 802.11abgn
       resources: irq:127 memory:a4000000-a4001fff

Also, I tried what happens if I disable the WiFi not using the network indicator but through the terminal:

sudo ifconfig wlp3s0 down
sudo ifconfig mon0 down

This did not do anything. My session has not crashed, but airodump-ng also did not stop capturing packets... Do I need to use a different command to disable WiFi the same way as the network indicator does?

I have to make my MariaDB authentication a bit safer than default. I tried to set up SSL support for this, but found only an old howto here:

How to enable MySQL SSL on Ubuntu

I followed it, however after checking I get this:

MariaDB [(none)]> show variables like "%ssl%";
+---------------+----------------------------+
| Variable_name | Value                      |
+---------------+----------------------------+
| have_openssl  | NO                         |
| have_ssl      | DISABLED                   |
| ssl_ca        | /etc/mysql/ca-cert.pem     |
| ssl_capath    |                            |
| ssl_cert      | /etc/mysql/server-cert.pem |
| ssl_cipher    |                            |
| ssl_crl       |                            |
| ssl_crlpath   |                            |
| ssl_key       | /etc/mysql/server-key.pem  |
+---------------+----------------------------+
9 rows in set (0.00 sec)

MariaDB [(none)]> \s
...
SSL: not in use
...

This source was written in 2011. Maybe it is outdated, or I've made a mistake somewhere. When I generated .pems there were no errors. My /var/log/mysql/error.log file is empty.

Do you have any ideas?

I face with problem

Sorry, there is nothing that matches your search

When searching in applications. However searching within files or musics etc is ok. Just applications are not found. it even does not try to find anything. No matter what you search, No app at all.

Here there is a list of my attempts:

sudo apt-get install unity-scope-home
Reading package lists... Done
Building dependency tree       
Reading state information... Done
unity-scope-home is already the newest version.
0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.

No effect.

sudo apt-get install unity-place-applications unity-place-files
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package unity-place-applications
E: Unable to locate package unity-place-files

No hope

rm ~/.cache -R
unity --reset &

Result:

[1] 5355
me@mypc:~$ ERROR: the reset option is now deprecated

still not working even by logout/login.

sudo apt-get update
sudo apt-get upgrade

No!

sudo apt-get install unity-scope-home unity-scope-loader
[sudo] password for me: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package unity-scope-loader

No!

sudo apt-get install --reinstall unity-scope-home
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 to upgrade, 0 to newly install, 1 to reinstall, 0 to remove and 0 not to upgrade.
Need to get 0 B/105 kB of archives.
After this operation, 0 B of additional disk space will be used.
(Reading database ... 565848 files and directories currently installed.)
Preparing to unpack .../unity-scope-home_6.8.2+14.04.20131029.1-0ubuntu1_amd64.deb ...
Unpacking unity-scope-home (6.8.2+14.04.20131029.1-0ubuntu1) over (6.8.2+14.04.20131029.1-0ubuntu1) ...
Setting up unity-scope-home (6.8.2+14.04.20131029.1-0ubuntu1) ...

No effect!

Edit:

I checked and realized that even other user accounts have the same problem.

pthreads works on the system:

$ gcc -o what what.c
/tmp/ccI6m52b.o: In function `main':
what.c:(.text+0x37): undefined reference to `pthread_create'
what.c:(.text+0x48): undefined reference to `pthread_join'
collect2: error: ld returned 1 exit status
$ gcc -pthread -o what what.c
$ ./what
In the thread.

However, when I run cmake with the following bare-bones CMakeLists.txt:

cmake_minimum_required(VERSION 2.8.6)
FIND_PACKAGE (Threads)

The output is:

-- Could NOT find Threads (missing:  Threads_FOUND)

What gives? Error log states:

/usr/bin/cc   -std=c11 -D_GNU_SOURCE   -Wall -Wextra -Wpointer-arith -Wundef -Wvla -Wwrite-strings -Werror -Wno-error=extra -Wno-error=deprecated-declarations -Wno-error=sign-compare -Wno-error=strict-aliasing -Wno-error=type-limits -Wno-unused-parameter -Wno-error=unused-variable -Wno-error=undef -Wno-error=uninitialized -Wlogical-op -Wno-error=maybe-uninitialized -Waggregate-return -Wnested-externs -Wold-style-definition -Wstrict-prototypes -march=native    -o CMakeFiles/cmTryCompileExec2533162744.dir/CheckIncludeFiles.c.o   -c /mnt/shared/fooproj/build/release/CMakeFiles/CMakeTmp/CheckIncludeFiles.c
/mnt/shared/fooproj/build/release/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:5:5: 
     error: function declaration isn’t a prototype [-Werror=strict-prototypes]
 int main(){return 0;}
 ^
/mnt/shared/fooproj/build/release/CMakeFiles/CMakeTmp/CheckIncludeFiles.c: 
     In function ‘main’:
/mnt/shared/fooproj/build/release/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:5:5: 
     error: old-style function definition [-Werror=old-style-definition]
cc1: all warnings being treated as errors
[...]
Source:
/* */
#include <pthread.h>


int main(){return 0;}

Could anyone please tell me how to remap my Super (left) key to Ctrl key?

I mean Super (left) should work as Ctrl key.