João Pimentel Ferreira's questions

$ sudo ufw status
Status: active

To                         Action      From
--                         ------      ----
Nginx Full                 ALLOW       Anywhere                  
22/tcp                     ALLOW       Anywhere                  
Nginx Full (v6)            ALLOW       Anywhere (v6)             
22/tcp (v6)                ALLOW       Anywhere (v6) 

How can I allow SSH (22/tcp) requests only from a certain region, country or continent?

This question is not related to allowing only requests from localhost, for example, because the IP of locahost is already known. I want something like to have all the IP ranges of a certain country in a text file and embed them into ufw allow rule.

I have a github action with a step for freeing space and it has a apt purge command followed by hundreds of packages. But if one package is not available, the all process fails

If you apt purge or remove a huge list of several packages at once, how to force the purge of existing installed packages?

Example:

sudo apt purge pack1 pack2 pack3 -y

if pack1 and pack2 exist but pack3 does not exists, the process fails

E: Unable to locate package 'pack3'

and pack1 and pack2 are not purged.

How to force removal of pack1 and pack2 even if one of the remaining doesn't exist?

A common annoying daily problem with déjà pup: I try to backup many files which I (my user) have no reading access. I get this daily because I want to backup the whole /home directory:

Previous answers for this question are deprecated because the command gksu deja-dup-preferences does not work, since gksu is deprecated after Ubuntu 18.04. Furthermore I tried also sudo deja-dup-preferences but I get sudo: deja-dup-preferences: command not found.

I also tried sudo deja-dup --backup but I get

Traceback (innermost last):
  File "/usr/bin/duplicity", line 106, in <module>
    with_tempdir(main)
  File "/usr/bin/duplicity", line 92, in with_tempdir
    fn()
  File "/usr/lib/python3/dist-packages/duplicity/dup_main.py", line 1525, in main
    action = commandline.ProcessCommandLine(sys.argv[1:])
  File "/usr/lib/python3/dist-packages/duplicity/commandline.py", line 1175, in ProcessCommandLine
    globals.backend = backend.get_backend(args[0])
  File "/usr/lib/python3/dist-packages/duplicity/backend.py", line 225, in get_backend
    obj = get_backend_object(url_string)
  File "/usr/lib/python3/dist-packages/duplicity/backend.py", line 211, in get_backend_object
    return factory(pu)
  File "/usr/lib/python3/dist-packages/duplicity/backends/giobackend.py", line 82, in __init__
    ensure_dbus()
  File "/usr/lib/python3/dist-packages/duplicity/backends/giobackend.py", line 37, in ensure_dbus
    output = p.communicate()[0].decode("utf8", errors="replace")
 AttributeError: 'str' object has no attribute 'decode'

Therefore my question is: How to run déjà-dup backup tool as root in Ubuntu 20.04 LTS?

I tried to upgrade to Ubuntu 22.04 LTS and the system crashed, tried several solutions and didn't work.

Eventually I tried to roll back to Ubuntu 20.04 LTS with the pen drive, chose option to erase everything and install anew and now doesn't even start.

It doesn't advance after this screen

I am totally lost, help would be highly appreciated. I already spent hours and nothing.

I know I can have my own keyboard layout with XKB, but the process is cumbersome.

Is there any GUI SW to customize the keyboard layout (for example for swapping keys)?

Preferably for Ubuntu 20.04.

I really need help on this cause I'm getting crazy, and honestly very disappointed with the stability of ubuntu, because I can't have a normal video-conference with anyone and as you can imagine that is a must nowadays. I searched already a lot in google and here and found no stable solution yet.

Since some months ago, the web internal camera of the laptop simply disconnects after 25-30 seconds and then reconnects again. In some video software the camera reconnects and I have to bear with a blink every 30 seconds and in other platforms such as in zoom the video simply freezes.

Features

• A Toshiba Satellite laptop
• Ubuntu 18.04 LTS

Some CLI outputs

$ v4l2-ctl --list-devices
TOSHIBA Web Camera - HD: TOSHIB (usb-0000:00:1a.0-1.3):
    /dev/video0
    /dev/video2

$ v4l2-ctl --device=/dev/video0 --all
Driver Info (not using libv4l2):
    Driver name   : uvcvideo
    Card type     : TOSHIBA Web Camera - HD: TOSHIB
    Bus info      : usb-0000:00:1a.0-1.3
    Driver version: 5.4.151
    Capabilities  : 0x84A00001
        Video Capture
        Metadata Capture
        Streaming
        Extended Pix Format
        Device Capabilities
    Device Caps   : 0x04200001
        Video Capture
        Streaming
        Extended Pix Format
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
    Width/Height      : 1280/720
    Pixel Format      : 'MJPG'
    Field             : None
    Bytes per Line    : 0
    Size Image        : 1843200
    Colorspace        : sRGB
    Transfer Function : Default (maps to sRGB)
    YCbCr/HSV Encoding: Default (maps to ITU-R 601)
    Quantization      : Default (maps to Full Range)
    Flags             : 
Crop Capability Video Capture:
    Bounds      : Left 0, Top 0, Width 1280, Height 720
    Default     : Left 0, Top 0, Width 1280, Height 720
    Pixel Aspect: 1/1
Selection: crop_default, Left 0, Top 0, Width 1280, Height 720
Selection: crop_bounds, Left 0, Top 0, Width 1280, Height 720
Streaming Parameters Video Capture:
    Capabilities     : timeperframe
    Frames per second: 30.000 (30/1)
    Read buffers     : 0
                     brightness 0x00980900 (int)    : min=0 max=100 step=1 default=50 value=50
                       contrast 0x00980901 (int)    : min=0 max=100 step=1 default=32 value=32
                     saturation 0x00980902 (int)    : min=0 max=100 step=1 default=32 value=32
                            hue 0x00980903 (int)    : min=-4 max=4 step=1 default=0 value=0
 white_balance_temperature_auto 0x0098090c (bool)   : default=1 value=1
                          gamma 0x00980910 (int)    : min=1 max=16 step=1 default=8 value=8
           power_line_frequency 0x00980918 (menu)   : min=0 max=2 default=1 value=1
      white_balance_temperature 0x0098091a (int)    : min=2800 max=6500 step=1 default=5000 value=5000 flags=inactive
                      sharpness 0x0098091b (int)    : min=0 max=20 step=1 default=4 value=4
         backlight_compensation 0x0098091c (int)    : min=0 max=1 step=1 default=0 value=0
                  exposure_auto 0x009a0901 (menu)   : min=0 max=3 default=3 value=3
         exposure_auto_priority 0x009a0903 (bool)   : default=0 value=1

$ v4l2-ctl --device=/dev/video2 --all
Driver Info (not using libv4l2):
    Driver name   : uvcvideo
    Card type     : TOSHIBA Web Camera - HD: TOSHIB
    Bus info      : usb-0000:00:1a.0-1.3
    Driver version: 5.4.151
    Capabilities  : 0x84A00001
        Video Capture
        Metadata Capture
        Streaming
        Extended Pix Format
        Device Capabilities
    Device Caps   : 0x04A00000
        Metadata Capture
        Streaming
        Extended Pix Format
Priority: 2

$ sudo journalctl  --follow | tee jc.log
-- Logs begin at Wed 2021-10-06 08:33:44 CEST. --
Dec 25 14:49:10 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input37/event6"
Dec 25 14:49:10 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) XINPUT: Adding extended input device "TOSHIBA Web Camera - HD: TOSHIB" (type: KEYBOARD, id 12)
Dec 25 14:49:10 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) Option "xkb_model" "pc105"
Dec 25 14:49:10 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) Option "xkb_layout" "pt"
Dec 25 14:49:10 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (WW) Option "xkb_variant" requires a string value
Dec 25 14:49:10 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (WW) Option "xkb_options" requires a string value
Dec 25 14:49:10 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) event6  - TOSHIBA Web Camera - HD: TOSHIB: is tagged by udev as: Keyboard
Dec 25 14:49:10 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) event6  - TOSHIBA Web Camera - HD: TOSHIB: device is a keyboard
Dec 25 14:49:21 toshiba sudo[16526]:     joao : TTY=pts/0 ; PWD=/home/joao ; USER=root ; COMMAND=/bin/journalctl --follow
Dec 25 14:49:21 toshiba sudo[16526]: pam_unix(sudo:session): session opened for user root by (uid=0)
Dec 25 14:50:18 toshiba kernel: usb 1-1.3: USB disconnect, device number 15
Dec 25 14:50:18 toshiba kernel: uvcvideo: Failed to resubmit video URB (-19).
Dec 25 14:50:18 toshiba cheese[6182]: cheese_preferences_dialog_on_source_change: assertion '_tmp2_ > ((guint) 0)' failed
Dec 25 14:50:18 toshiba kernel: uvcvideo: Failed to resubmit video URB (-19).
Dec 25 14:50:18 toshiba cheese[6182]: cheese_camera_device_get_name: assertion 'CHEESE_IS_CAMERA_DEVICE (device)' failed
Dec 25 14:50:18 toshiba cheese[6182]: g_variant_new_string: assertion 'string != NULL' failed
Dec 25 14:50:18 toshiba cheese[6182]: g_variant_ref_sink: assertion 'value != NULL' failed
Dec 25 14:50:18 toshiba cheese[6182]: g_settings_schema_key_type_check: assertion 'value != NULL' failed
Dec 25 14:50:18 toshiba cheese[6182]: g_variant_get_type_string: assertion 'value != NULL' failed
Dec 25 14:50:18 toshiba cheese[6182]: g_settings_set_value: key 'camera' in 'org.gnome.Cheese' expects type 's', but a GVariant of type '(null)' was given
Dec 25 14:50:18 toshiba cheese[6182]: g_variant_unref: assertion 'value != NULL' failed
Dec 25 14:50:18 toshiba cheese[6182]: cheese_preferences_dialog_setup_resolutions_for_device: assertion 'device != NULL' failed
Dec 25 14:50:18 toshiba kernel: uvcvideo: Failed to resubmit video URB (-19).
Dec 25 14:50:18 toshiba kernel: uvcvideo: Failed to resubmit video URB (-19).
Dec 25 14:50:18 toshiba kernel: uvcvideo: Failed to resubmit video URB (-19).
Dec 25 14:50:18 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) config/udev: removing device TOSHIBA Web Camera - HD: TOSHIB
Dec 25 14:50:18 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) Option "fd" "59"
Dec 25 14:50:18 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) event6  - TOSHIBA Web Camera - HD: TOSHIB: device removed
Dec 25 14:50:18 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) UnloadModule: "libinput"
Dec 25 14:50:18 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) systemd-logind: releasing fd for 13:70
Dec 25 14:50:18 toshiba upowerd[1299]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.1
Dec 25 14:50:18 toshiba upowerd[1299]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0
Dec 25 14:50:18 toshiba upowerd[1299]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3
Dec 25 14:50:18 toshiba gnome-shell[1790]: g_array_unref: assertion 'array' failed
Dec 25 14:50:19 toshiba kernel: usb 1-1.3: new high-speed USB device number 16 using ehci-pci
Dec 25 14:50:19 toshiba kernel: usb 1-1.3: New USB device found, idVendor=04f2, idProduct=b448, bcdDevice=49.02
Dec 25 14:50:19 toshiba kernel: usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Dec 25 14:50:19 toshiba kernel: usb 1-1.3: Product: TOSHIBA Web Camera - HD
Dec 25 14:50:19 toshiba kernel: usb 1-1.3: Manufacturer: Namuga
Dec 25 14:50:20 toshiba kernel: uvcvideo: Found UVC 1.00 device TOSHIBA Web Camera - HD (04f2:b448)
Dec 25 14:50:20 toshiba kernel: input: TOSHIBA Web Camera - HD: TOSHIB as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input38
Dec 25 14:50:20 toshiba mtp-probe[18900]: checking bus 1, device 16: "/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3"
Dec 25 14:50:20 toshiba mtp-probe[18900]: bus: 1, device: 16 was not an MTP device
Dec 25 14:50:20 toshiba upowerd[1299]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.1
Dec 25 14:50:20 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) config/udev: Adding input device TOSHIBA Web Camera - HD: TOSHIB (/dev/input/event6)
Dec 25 14:50:20 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) TOSHIBA Web Camera - HD: TOSHIB: Applying InputClass "libinput keyboard catchall"
Dec 25 14:50:20 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) Using input driver 'libinput' for 'TOSHIBA Web Camera - HD: TOSHIB'
Dec 25 14:50:20 toshiba upowerd[1299]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0
Dec 25 14:50:20 toshiba upowerd[1299]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) systemd-logind: got fd for /dev/input/event6 13:70 fd 59 paused 0
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) TOSHIBA Web Camera - HD: TOSHIB: always reports core events
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) Option "Device" "/dev/input/event6"
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) Option "_source" "server/udev"
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) event6  - TOSHIBA Web Camera - HD: TOSHIB: is tagged by udev as: Keyboard
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) event6  - TOSHIBA Web Camera - HD: TOSHIB: device is a keyboard
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) event6  - TOSHIBA Web Camera - HD: TOSHIB: device removed
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.3/1-1.3:1.0/input/input38/event6"
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) XINPUT: Adding extended input device "TOSHIBA Web Camera - HD: TOSHIB" (type: KEYBOARD, id 12)
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) Option "xkb_model" "pc105"
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (**) Option "xkb_layout" "pt"
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (WW) Option "xkb_variant" requires a string value
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (WW) Option "xkb_options" requires a string value
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) event6  - TOSHIBA Web Camera - HD: TOSHIB: is tagged by udev as: Keyboard
Dec 25 14:50:21 toshiba /usr/lib/gdm3/gdm-x-session[1653]: (II) event6  - TOSHIBA Web Camera - HD: TOSHIB: device is a keyboard

$ lsusb -t
/:  Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/14p, 480M
    |__ Port 2: Dev 3, If 0, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 2: Dev 3, If 1, Class=Human Interface Device, Driver=usbhid, 12M
    |__ Port 2: Dev 3, If 2, Class=Human Interface Device, Driver=usbhid, 12M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/8p, 480M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/2p, 480M
    |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/6p, 480M
        |__ Port 2: Dev 3, If 1, Class=Wireless, Driver=btusb, 12M
        |__ Port 2: Dev 3, If 0, Class=Wireless, Driver=btusb, 12M
        |__ Port 3: Dev 69, If 0, Class=Video, Driver=uvcvideo, 480M
        |__ Port 3: Dev 69, If 1, Class=Video, Driver=uvcvideo, 480M

Problem

Thanks a lot in advance

If I have an external drive I access via FTPS, how can I add a systemctl service to mount it and unmount it and have it mount it upon start-up? I already saw some examples with scripts and crontab but I found them too incoherent and hard to deal with.

Recently bluetooth is giving a lot of problems in 18.04.5 LTS (I have the latest update), specially when I awake the laptop (I have no TLP installed). I updated bluez and nothing changed. Bluetooth can't connect and does not seem to power on, even after restarting the service.

I find these errors on red when I check the status of bluetooth after restart:

Version mismatch for sixaxis
Loading LTKs timed out for hci0
Failed to set mode: Failed (0x03)

I also get Failed to set power on: org.bluez.Error.Failed when I try to power on on bluetoothctl

Log

$ sudo service bluetooth restart
$ sudo service bluetooth status
● bluetooth.service - Bluetooth service
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset: enabled)
   Active: active (running) since Sun 2021-01-10 14:12:22 CET; 18s ago
     Docs: man:bluetoothd(8)
 Main PID: 13873 (bluetoothd)
   Status: "Running"
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/bluetooth.service
           └─13873 /usr/lib/bluetooth/bluetoothd

Jan 10 14:12:22 toshiba systemd[1]: Starting Bluetooth service...
Jan 10 14:12:22 toshiba bluetoothd[13873]: Bluetooth daemon 5.50
Jan 10 14:12:22 toshiba systemd[1]: Started Bluetooth service.
Jan 10 14:12:22 toshiba bluetoothd[13873]: Starting SDP server
Jan 10 14:12:22 toshiba bluetoothd[13873]: Version mismatch for sixaxis
Jan 10 14:12:22 toshiba bluetoothd[13873]: Bluetooth management interface 1.14 initialized
Jan 10 14:12:22 toshiba bluetoothd[13873]: Endpoint registered: sender=:1.91 path=/MediaEndpoint/A2DPSource
Jan 10 14:12:22 toshiba bluetoothd[13873]: Endpoint registered: sender=:1.91 path=/MediaEndpoint/A2DPSink
Jan 10 14:12:24 toshiba bluetoothd[13873]: Loading LTKs timed out for hci0
Jan 10 14:12:32 toshiba bluetoothd[13873]: Failed to set mode: Failed (0x03)


$ sudo bluetoothctl
Agent registered
[bluetooth]# power on
Failed to set power on: org.bluez.Error.Failed

*-usb:0
  description: Bluetooth wireless interface
  vendor: Intel Corp.
  physical id: 2
  bus info: usb@1:1.2
  version: 0.01
  capabilities: bluetooth usb-2.00
  configuration: driver=btusb maxpower=100mA speed=12Mbit/s

Note

To make it work again, I need to reboot or restart bluetooth with

rfkill block bluetooth
rfkill unblock bluetooth

This is really annoying because I'm using it for a bluetooth keyboard, and every time it fails to connect I have to switch to the laptop internal keyboard.

output of lsusb; dmesg | grep -i blue

$ lsusb; dmesg | grep -i blue
Bus 002 Device 002: ID 8087:8000 Intel Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 04f2:b448 Chicony Electronics Co., Ltd 
Bus 001 Device 003: ID 8087:07dc Intel Corp. 
Bus 001 Device 002: ID 8087:8008 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 005: ID 043e:9a39 LG Electronics USA, Inc. 
Bus 003 Device 007: ID 0bda:8153 Realtek Semiconductor Corp. 
Bus 003 Device 006: ID 046d:c52f Logitech, Inc. Unifying Receiver
Bus 003 Device 004: ID 0bda:5411 Realtek Semiconductor Corp. 
Bus 003 Device 003: ID 0451:ace1 Texas Instruments, Inc. 
Bus 003 Device 002: ID 0451:8142 Texas Instruments, Inc. TUSB8041 4-Port Hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
[    2.908829] toshiba_bluetooth: Toshiba ACPI Bluetooth device driver
[    2.977750] Bluetooth: Core ver 2.22
[    2.977769] Bluetooth: HCI device and connection manager initialized
[    2.977772] Bluetooth: HCI socket layer initialized
[    2.977774] Bluetooth: L2CAP socket layer initialized
[    2.977777] Bluetooth: SCO socket layer initialized
[    3.076056] Bluetooth: hci0: read Intel version: 3707100100012d0d27
[    3.076057] Bluetooth: hci0: Intel device is already patched. patch num: 27
[    4.525995] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    4.525997] Bluetooth: BNEP filters: protocol multicast
[    4.526002] Bluetooth: BNEP socket layer initialized
[   21.781694] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[   21.781703] Bluetooth: HIDP socket layer initialized
[   21.783380] input: Matias Wireless Keyboard (ISO) Keyboard as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/bluetooth/hci0/hci0:256/0005:05AC:0250.0005/input/input26
[   21.783901] input: Matias Wireless Keyboard (ISO) Consumer Control as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/bluetooth/hci0/hci0:256/0005:05AC:0250.0005/input/input27
[   21.784070] input: Matias Wireless Keyboard (ISO) System Control as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.2/1-1.2:1.0/bluetooth/hci0/hci0:256/0005:05AC:0250.0005/input/input28
[   21.784238] hid-generic 0005:05AC:0250.0005: input,hidraw4: BLUETOOTH HID v0.03 Keyboard [Matias Wireless Keyboard (ISO)] on 34:de:1a:7f:93:1e
[   36.751358] Bluetooth: RFCOMM TTY layer initialized
[   36.751364] Bluetooth: RFCOMM socket layer initialized
[   36.751369] Bluetooth: RFCOMM ver 1.11
[ 7147.255880] Bluetooth: hci0: command 0x0804 tx timeout
[ 7369.683801] Bluetooth: hci0: command 0x1405 tx timeout
[ 7371.699689] Bluetooth: hci0: command 0x1403 tx timeout
[ 7373.715640] Bluetooth: hci0: command 0x0c2d tx timeout
[ 7375.731641] Bluetooth: hci0: command 0x1405 tx timeout
[ 7375.731645] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7377.747576] Bluetooth: hci0: command 0x1403 tx timeout
[ 7377.747583] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7379.763562] Bluetooth: hci0: command 0x0c2d tx timeout
[ 7379.763566] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7381.779558] Bluetooth: hci0: command 0x1405 tx timeout
[ 7381.779564] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7383.795496] Bluetooth: hci0: command 0x1403 tx timeout
[ 7383.795501] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7385.811505] Bluetooth: hci0: command 0x0c2d tx timeout
[ 7385.811514] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7387.827417] Bluetooth: hci0: command 0x1405 tx timeout
[ 7387.827426] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7389.843348] Bluetooth: hci0: command 0x1403 tx timeout
[ 7389.843353] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7391.859270] Bluetooth: hci0: command 0x0c2d tx timeout
[ 7391.859275] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7393.875274] Bluetooth: hci0: command 0x1405 tx timeout
[ 7393.875280] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7395.891263] Bluetooth: hci0: command 0x1403 tx timeout
[ 7395.891267] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7397.907255] Bluetooth: hci0: command 0x0c2d tx timeout
[ 7397.907262] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7399.923137] Bluetooth: hci0: command 0x1405 tx timeout
[ 7399.923142] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7401.939191] Bluetooth: hci0: command 0x1403 tx timeout
[ 7401.939199] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7403.955137] Bluetooth: hci0: command 0x0c2d tx timeout
[ 7403.955144] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7405.971021] Bluetooth: hci0: command 0x1405 tx timeout
[ 7405.971026] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7407.990996] Bluetooth: hci0: command 0x1403 tx timeout
[ 7407.991005] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7410.003001] Bluetooth: hci0: command 0x0c2d tx timeout
[ 7410.003006] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7412.018986] Bluetooth: hci0: command 0x1405 tx timeout
[ 7412.018994] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7414.038911] Bluetooth: hci0: command 0x1403 tx timeout
[ 7414.038916] Bluetooth: hci0: No way to reset. Ignoring and continuing
[ 7416.050860] Bluetooth: hci0: command 0x0c2d tx timeout
[ 7416.050863] Bluetooth: hci0: No way to reset. Ignoring and continuing

Ubuntu is great and thus I installed it in my father's computer. But the computer is quite old and Ubuntu was becoming slower after every upgrade (now it's on version 18.04 LTS). Thus I installed Lubuntu on top of it. Now he just uses Lubuntu and he's quite happy about it.

How can Ubuntu be removed from a computer which has both Ubuntu and Lubuntu? They are both in the same partition.

Is there any GUI network/bandwidth analyser which gives network consumptions per process and an overall sum over a large period of time?

I use nethogs which is great but it's for command line.

Using FSlint terminal or command line options, is there a command to mass delete (all but the first of the group) or mass merge (with symlinks) all files within a directory?

It seems my ISP is a mess, blocking some relevant and renowned sites/IPs (maybe through DNS, I don't really know) and not others, it's been a nightmare.

Is there a command line script to test internet access to a wide (I know, fully is literally impossible) variety of known websites and IP addresses? A kind of AND amongst several pings to different credited websites and IPs, such that I can test the "health" of the DNS servers I'm using and the freedom of internet access I'm allowed to.

I simple do not want to do ping all the time and it's been like lottery. It seems I can use a bash with wget --spider --quiet http://example.com, but has anyone a script or bash ready to use that want to share?

Since I've installed 18.04 my network has been a totally nightmare to debug. I'm with this for one day.

I really don't know what's going on. I can access some websites and others not. ping ubuntu.com does work but ping nba.com does not. In my browser when I go to ubuntu.com it does not work. apt update does not work. When I go to GUI dialog Software & Updates and Select best server no server is provided.

sudo apt update -y
Err:1 http://ppa.launchpad.net/webupd8team/atom/ubuntu bionic InRelease
  Connection failed [IP: 91.189.95.83 80]
Err:2 http://in.archive.ubuntu.com/ubuntu bionic InRelease
  Connection failed [IP: 91.189.88.162 80]
Err:3 http://in.archive.ubuntu.com/ubuntu bionic-security InRelease
  Connection failed [IP: 91.189.88.149 80]

but ping 91.189.88.83 does work

ping 91.189.95.83
PING 91.189.95.83 (91.189.95.83) 56(84) bytes of data.
64 bytes from 91.189.95.83: icmp_seq=1 ttl=56 time=20.6 ms
64 bytes from 91.189.95.83: icmp_seq=2 ttl=56 time=18.7 ms
64 bytes from 91.189.95.83: icmp_seq=3 ttl=56 time=19.6 ms
64 bytes from 91.189.95.83: icmp_seq=4 ttl=56 time=19.2 ms

cat /etc/apt/sources.list
#------------------------------------------------------------------------------#
#                            OFFICIAL UBUNTU REPOS                             #
#------------------------------------------------------------------------------#


###### Ubuntu Main Repos
deb http://in.archive.ubuntu.com/ubuntu/ bionic main restricted universe multiverse 

###### Ubuntu Update Repos
deb http://in.archive.ubuntu.com/ubuntu/ bionic-security main restricted universe multiverse 
deb http://in.archive.ubuntu.com/ubuntu/ bionic-updates main restricted universe multiverse

ifconfig

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.0  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::28c:faff:fe8a:7cba  prefixlen 64  scopeid 0x20<link>
        ether 00:8c:fa:8a:7c:ba  txqueuelen 1000  (Ethernet)
        RX packets 198488  bytes 80931214 (80.9 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 148532  bytes 71462491 (71.4 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 238660  bytes 25150962 (25.1 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 238660  bytes 25150962 (25.1 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.9  netmask 255.255.255.0  broadcast 192.168.1.255
        inet6 fe80::5e82:7f12:37f8:854f  prefixlen 64  scopeid 0x20<link>
        ether 34:de:1a:7f:93:1a  txqueuelen 1000  (Ethernet)
        RX packets 29308  bytes 10218041 (10.2 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 15815  bytes 2638177 (2.6 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

cat /etc/netplan/01-netcfg.yaml 
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: yes
      dhcp6: yes
      addresses: [192.168.1.0/24, ]
      gateway4:  192.168.1.1
      nameservers:
              addresses: [192.168.1.1, 8.8.8.8, 8.8.4.4]

systemd-resolve --status
Global
         DNS Servers: 192.168.1.1
          DNSSEC NTA: 10.in-addr.arpa
                      16.172.in-addr.arpa
                      168.192.in-addr.arpa
                      17.172.in-addr.arpa
                      18.172.in-addr.arpa
                      19.172.in-addr.arpa
                      20.172.in-addr.arpa
                      21.172.in-addr.arpa
                      22.172.in-addr.arpa
                      23.172.in-addr.arpa
                      24.172.in-addr.arpa
                      25.172.in-addr.arpa
                      26.172.in-addr.arpa
                      27.172.in-addr.arpa
                      28.172.in-addr.arpa
                      29.172.in-addr.arpa
                      30.172.in-addr.arpa
                      31.172.in-addr.arpa
                      corp
                      d.f.ip6.arpa
                      home
                      internal
                      intranet
                      lan
                      local
                      private
                      test

Link 3 (wlan0)
      Current Scopes: DNS
       LLMNR setting: yes
MulticastDNS setting: no
      DNSSEC setting: no
    DNSSEC supported: no
         DNS Servers: 192.168.1.1

Link 2 (eth0)
      Current Scopes: DNS
       LLMNR setting: yes
MulticastDNS setting: no
      DNSSEC setting: no
    DNSSEC supported: no
         DNS Servers: 192.168.1.1
                      8.8.8.8
                      8.8.4.4

I see we have apt update and apt upgrade, but then we should do apt autoremove and/or apt autoclean, etc.

Is there a single command for full Ubuntu maintenance?

I'm on Ubuntu 18.04.1 LTS and this red triangle sign (top right on the image) appears often, and when I click there and then click Install all updates nothing happens. This occurs often and is a burden.

What exactly does it mean that red triangle and when does it appear? That there are updates, or upgrades?

shall I do?

sudo apt-get update -y

It's strange, but my rendered video is portrait oriented and I want landscape. I've been googling for two days with zero results. I know how to rotate a video using a rotating effect, but how to set the orientation of the rendered video and/or preview video?

I went to project settings and set to 16:9 but nothing.

These are my video project settings:

Frame size: 1920 x 1080 (16:9)
Frame rate: 25 fps
Pixel Aspect Ratio: 1
Color Space: ITU-R 709
Interlaced : no

So, why my preview video is portrait, cropping my landscape clip?

I know there is a lot of topics around this issue, but now it's strange since Bluetooth seems to /should work. When I do

sudo service bluetooth status

I get the following result which seems to be working (I put directly the image so one can check the green highlights)

But on settings->bluetooth

the result of command hcitool dev is empty, i.e.

Devices:

and the result of hcitool scan is

Device is not available: No such device

How can I activate the Bluetoth in settings?

I'm using Déjà Dup to backup my disks into a cloud disk, but it's not accessible 24/7 (long story). When it tries to connect and it's not accessible, Déjà Dup gives an error, and in the next time it cannot connect again (I suppose the file system disables this cloud disk).

Is there a way to setup on which time Déjà Dup makes the automatic backup? Where are the cron job files/tasks? May I changed them manually?

Suddenly Chrome stopped working, I get this error:

jfolpf@toshiba:~$ google-chrome-stable
[7372:7408:1007/230103.985302:FATAL:nss_util.cc(632)] NSS_VersionCheck("3.26") failed. NSS >= 3.26 is required. Please upgrade to the latest NSS, and if you still get this error, contact your distribution maintainer.

I already updated nss package

sudo apt-get install libnss3

but no success. Any ideas?

In my Ubuntu I went to System Settings > Language support -> Install/Remove Languages and I just get English.

I tried sudo apt-get install language-pack-fr language-pack-gnome-fr language-pack-fr-base language-pack-gnome-fr-base as suggested in the answer to How can I install one language by command-line. For any language I try I get no success with this method.

Any ideas?