MikiBelavista's questions

The integrated webcam is not working(Lenovo Thinkpad). The light is on but the screen is black(Skype zoom whatever).

lsusb
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 004: ID 0bda:c123 Realtek Semiconductor Corp. Bluetooth Radio
Bus 003 Device 003: ID 27c6:55a2 Shenzhen Goodix Technology Co.,Ltd. Goodix FingerPrint Device
Bus 003 Device 002: ID 1a2c:99f4 China Resource Semico Co., Ltd USB Gaming Keyboard 
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 5986:2137 Acer, Inc Integrated Camera

ANd

lsmod | grep video
uvcvideo              106496  0
videobuf2_vmalloc      20480  1 uvcvideo
videobuf2_memops       20480  1 videobuf2_vmalloc
videobuf2_v4l2         32768  1 uvcvideo
videobuf2_common       61440  4 videobuf2_vmalloc,videobuf2_v4l2,uvcvideo,videobuf2_memops
videodev              249856  3 videobuf2_v4l2,uvcvideo,videobuf2_common
mc                     57344  4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
video                  53248  1 ideapad_laptop

I tried similar SO issue solution

 ffmpeg -f v4l2 -video_size 1280x720 -i /dev/video0 -frames 1 out2.jpg
ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
  configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, video4linux2,v4l2, from '/dev/video0':
  Duration: N/A, start: 1364.570108, bitrate: 147456 kb/s
    Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1280x720, 147456 kb/s, 10 fps, 10 tbr, 1000k tbn, 1000k tbc
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x55def64ba100] deprecated pixel format used, make sure you did set range correctly
Output #0, image2, to 'out2.jpg':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0: Video: mjpeg, yuvj422p(pc), 1280x720, q=2-31, 200 kb/s, 10 fps, 10 tbn, 10 tbc
    Metadata:
      encoder         : Lavc58.54.100 mjpeg
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame=    1 fps=0.0 q=1.8 Lsize=N/A time=00:00:00.10 bitrate=N/A speed=11.6x    
video:17kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

I got black scree image

How to check this and find the root cause?

I ran this script to create users and groups

  groupadd hadoop
  useradd -g hadoop yarn
  useradd -g hadoop hdfs
  useradd -g hadoop mapred

But if I try to login

miki@miki:~$ su - hdfs
Password: 
su: Authentication failure

I have not submitted any password for my hdfs user.

cut -d: -f1 /etc/passwd output
yarn
hdfs
mapred

How to solve this problem?

My friend gave me a USB with some tutorials that are iso formated When I try to open them on my Ubuntu 18.04,I got this

If I choose to start restoring will it erase all the other content on my 500GB disk or not?

I am reading Python Networking book:

When a network device generates network traffic that needs to be sent across a network, it first compares the destination's IP address with its own network prefix.

My nmcli:

GENERAL.DEVICE:                         enp3s0
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         70:4D:7B:41:40:67
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     Wired connection 1
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/0
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         192.168.0.12/24
IP4.GATEWAY:                            192.168.0.1
IP4.ROUTE[1]:                           dst = 169.254.0.0/16, nh = 0.0.0.0, mt = 1000
IP4.DNS[1]:                             8.8.8.8
IP6.ADDRESS[1]:                         fe80::94ea:6996:dd8b:8eec/64
IP6.GATEWAY:  

Where is network prefix?

I have just added the second Kingston memory stick to my computer. After connecting everything,I had arranged a chat with my client but my headset microphone is not working. I have tried to change all the slots but to no avail:

I have tried everything, including using alsamixer:

Every time I reboot my comp second column,headphone goes to 0!

My cards

What should I try next?

I have inserted my MD Elements Hard Drive.I can not mount it,this is the first time that I have a problem like this.

Error mounting /dev/sdc1 at /media/milenko/Elements: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000" "/dev/sdc1" "/media/milenko/Elements"' exited with non-zero exit status 13: $MFTMirr does not match $MFT (record 0)

I am confused with this.What does MFTMirr stand for? How to solve this?

I have formated my laptop, wireless is not detected.

    *-network               
       description: Network controller
       product: BCM4312 802.11b/g LP-PHY
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       version: 01
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=b43-pci-bridge latency=0
       resources: irq:17 memory:98200000-98203fff
  *-network
       description: Ethernet interface
       product: 88E8072 PCI-E Gigabit Ethernet Controller
       vendor: Marvell Technology Group Ltd.
       physical id: 0
       bus info: pci@0000:86:00.0
       logical name: ens5
       version: 00
       serial: 00:25:b3:42:05:5c
       size: 1Gbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=sky2 driverversion=1.30 duplex=full ip=192.168.0.13 latency=0 link=yes multicast=yes port=twisted pair speed=1Gbit/s
       resources: irq:30 memory:90100000-90103fff ioport:2000(size=256) memory:90120000-9013ffff
  *-network DISABLED
       description: Wireless interface
       physical id: 1
       logical name: wlan0
       serial: 00:21:00:b2:16:48
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=b43 driverversion=4.4.0-116-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11bg

This is what I have tried so far.

sudo ip link set ens5 up

mm@6830s:~$ iwconfig
ens5      no wireless extensions.

lo        no wireless extensions.

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

But it does not work.

sudo iwlist wlp3s0 scan
[sudo] password for mm: 
wlp3s0    Interface doesn't support scanning : Network is down

This my interface

/etc/network/interfaces 
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

auto ens5
iface ens5 inet dhcp

Edit


       lsmod | grep hp
hp_wmi                 16384  0
sparse_keymap          16384  1 hp_wmi
hp_accel               28672  0
lis3lv02d              20480  1 hp_accel
shpchp                 36864  0
wmi                    20480  1 hp_wmi
mm@6830s:~$ sudo modprobe -r hp-wmi
[sudo] password for mm: 
mm@6830s:~$ lsmod | grep hp
hp_accel               28672  0
lis3lv02d              20480  1 hp_accel
shpchp                 36864  0

No improvement,I can not turn on wireless.

Button goes back to off immediately. Why?

My laptop is HP6830s, Ubuntu 16.04. My boot options

How to fix this?

I have added

echo "deb http://www.apache.org/dist/cassandra/debian 311x main" | sudo tee -a /etc/apt/sources.list.d/cassandra.sources.list

Now I want to remove it and install Cassandra in another way.How to delete it?

What do /var/log files serve for?When I try to run cassandra on my Ubuntu 16.04

OpenJDK 64-Bit Server VM warning: Cannot open file /var/log/cassandra/gc.log due to Permission denied

Later

19:47:58,887 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[SYSTEMLOG] - Active log file name: /var/log/cassandra/system.log
19:47:58,887 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[SYSTEMLOG] - File property is set to [/var/log/cassandra/system.log]
19:47:58,889 |-ERROR in ch.qos.logback.core.rolling.RollingFileAppender[SYSTEMLOG] - openFile(/var/log/cassandra/system.log,true) call failed. java.io.FileNotFoundException: /var/log/cassandra/system.log (Permission denied)
    at java.io.FileNotFoundException: /var/log/cassandra/system.log (Permission denied)

Why do I have these problems? This is my java

java -version
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)

These are the permissions

/var/log$ ls -la cassandra/
total 300
drwxr-xr-x  2 cassandra cassandra   4096 jan.  25 15:50 .
drwxrwxr-x 14 root      syslog      4096 jan.  25 15:49 ..
-rw-r--r--  1 cassandra cassandra 184448 jan.  25 19:50 debug.log
-rw-r--r--  1 cassandra cassandra  59956 jan.  25 19:50 gc.log.0.current
-rw-r--r--  1 cassandra cassandra  41363 jan.  25 19:50 system.log

I have installed Ubuntu 16.04 on the same desktop,but now I have problem that it does not turn back after inactivity.Why?Which settings should I change?

xset q
Keyboard Control:
  auto repeat:  on    key click percent:  0    LED mask:  00000000
  XKB indicators:
    00: Caps Lock:   off    01: Num Lock:    off    02: Scroll Lock: off
    03: Compose:     off    04: Kana:        off    05: Sleep:       off
    06: Suspend:     off    07: Mute:        off    08: Misc:        off
    09: Mail:        off    10: Charging:    off    11: Shift Lock:  off
    12: Group 2:     off    13: Mouse Keys:  off
  auto repeat delay:  500    repeat rate:  33
  auto repeating keys:  00ffffffdffffbbf
                        fadfffefffedffff
                        9fffffffffffffff
                        fff7ffffffffffff
  bell percent:  50    bell pitch:  400    bell duration:  100
Pointer Control:
  acceleration:  2/1    threshold:  4
Screen Saver:
  prefer blanking:  yes    allow exposures:  yes
  timeout:  0    cycle:  0
Colors:
  default colormap:  0x20    BlackPixel:  0x0    WhitePixel:  0xffffff
Font Path:
  /usr/share/fonts/X11/misc,/usr/share/fonts/X11/Type1,built-ins
DPMS (Energy Star):
  Standby: 0    Suspend: 0    Off: 0
  DPMS is Enabled
  Monitor is On

I have output like this

ifconfig | grep "inet addr"
          inet addr:*.18.0.1  Bcast:0.0.0.0  Mask:255.255.0.0
          inet addr:*.17.0.1  Bcast:0.0.0.0  Mask:255.255.0.0
          inet addr:*.168.0.12  Bcast:192.168.0.255  Mask:255.255.255.0
          inet addr:127.0.0.1  Mask:255.0.0.0

This is what I got

ifconfig | awk '/Link encap:/ {print $1}'
br-498e85899682
docker0
enp3s0
lo

Why do I have four IP addresses?

I have Ubuntu 16.04(host) and Windows10(guest) on my OracleVM.I want to install guest addition but where is Device tab?

These are my UserInterface settings now

This is my menubar

EDIT

FINALLY SOLVED,Just actived here Device button.

I have created xorg.conf file in tty (Ctrl+alt+F1).After that I can not log in,when I put password,I am in a loop and can not log in.I do not have any problems in tty.How to solve this?

I do not know how it comes, but my calendar(upper right corner) is in Polish. How to change this to English?

I have worked quite a lot but I am not sure if everything is ok.

nvidia-smi
Sun May 21 11:29:57 2017       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 375.39                 Driver Version: 375.39                    |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|===============================+======================+======================|
|   0  GeForce GT 730      Off  | 0000:01:00.0     N/A |                  N/A |
| 40%   39C    P8    N/A /  N/A |    295MiB /  1984MiB |     N/A      Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID  Type  Process name                               Usage      |
|=============================================================================|
|    0                  Not Supported                                         |
+-----------------------------------------------------------------------------+

Then

 nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2015 NVIDIA Corporation
Built on Tue_Aug_11_14:27:32_CDT_2015
Cuda compilation tools, release 7.5, V7.5.17

And finally

which nvcc
/usr/bin/nvcc

But my installation directory is

ldconfig -p | grep cuda
    libnvrtc.so.8.0 (libc6,x86-64) => /usr/local/cuda-8.0/targets/x86_64-linux/lib/libnvrtc.so.8.0
    libnvrtc.so (libc6,x86-64) => /usr/local/cuda-8.0/targets/x86_64-linux/lib/libnvrtc.so
    libnvrtc-builtins.so.8.0 (libc6,x86-64) => /usr/local/cuda-8.0/targets/x86_64-linux/lib/libnvrtc-builtins.so.8.0
    libnvrtc-builtins.so (libc6,x86-64) => /usr/local/cuda-8.0/targets/x86_64-linux/lib/libnvrtc-builtins.so

Is this ok?Why is nvcc pointing to other directory?

I try to install midori web browser,but this appears

sudo apt-get install midori
Reading package lists... Done
Building dependency tree       
Reading state information... Done
midori is already the newest version (0.5.11-ds1-2).
The following packages were automatically installed and are no longer required:
  libllvm3.8:i386 linux-headers-4.4.0-31 linux-headers-4.4.0-31-generic linux-headers-4.4.0-38 linux-headers-4.4.0-38-generic linux-image-4.4.0-31-generic linux-image-4.4.0-38-generic
  linux-image-extra-4.4.0-31-generic linux-image-extra-4.4.0-38-generic
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 35 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up matlab-support (0.0.21) ...
No default Matlab path found. Exiting.
dpkg: error processing package matlab-support (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 matlab-support
E: Sub-process /usr/bin/dpkg returned an error code (1)

sudo apt-get remove matlab-suport
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package matlab-suport

I have tried to install matlab support,now I do not know how to get rid of this.It appears all the time.WHat should I try?

I am trying to install R

gpg --keyserver keyserver.ubuntu.com --recv-key E084DAB9
gpg: keyring `/home/milenko/.gnupg/secring.gpg' created
gpg: keyring `/home/milenko/.gnupg/pubring.gpg' created
gpg: requesting key E084DAB9 from hkp server keyserver.ubuntu.com
gpg: keyserver timed out
gpg: keyserver receive failed: keyserver error

This also does not help

gpg --keyserver keyserver.ubuntu.com:80 --recv-key E084DAB9
gpg: requesting key E084DAB9 from keyserver.ubuntu.com:80
gpgkeys: no keyserver host provided
gpg: keyserver internal error
gpg: keyserver receive failed: keyserver error

I am on Ubuntu 16.04.

I have repeated the whole process three times,trying to install Ubuntu 16.04 from my USB.But when I try to restart the computer I got

[  5.744249] ata16.00: exception Emask 0x1 SAct 0x0 SErr 0x0 action 0x0
[  5.744257] ata16.00: irq_stat 0x400000001
[  5.744265] ata16.00: cmd a0/01:00:00:00:00:01

and so on I have tried to Google it. It seems that I have hardware incompatibility. Yes or no? What is really crazy is that I can choose that option try Ubuntu without installing it and appears Ubuntu with Unity icons.My hardware spec

Intel Core i7 DX580G
Seagate Desktop HDD
Marvel Sata Controler

What should I try?

I am on Ubuntu 14.04, with Google Chrome I have problem with these journal and Facebook notifications that pop up all the time. I have set up content settings, do not allow any site to show notifications. What should I try next?

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT

    lsblk
        sda      8:0    0 931,5G  0 disk 
        ├─sda1   8:1    0   100M  0 part 
        ├─sda2   8:2    0 150,3G  0 part 
        ├─sda3   8:3    0 558,5G  0 part 
        ├─sda4   8:4    0     1K  0 part 
        ├─sda5   8:5    0 220,7G  0 part /
        └─sda6   8:6    0     2G  0 part [SWAP]
        sdb      8:16   1   7,5G  0 disk 
        └─sdb1   8:17   1   7,5G  0 part 
        sr0     11:0    1  1024M  0 rom 

And when I try

 mount /dev/sdb /mnt
mount: wrong fs type, bad option, bad superblock on /dev/sdb,
       missing codepage or helper program, or other error

With dmesg -tail

dmesg | tail
[ 1059.082039] usbcore: registered new interface driver usb-storage
[ 1059.109149] usbcore: registered new interface driver uas
[ 1060.081502] scsi 6:0:0:0: Direct-Access     JetFlash Transcend 8GB    8.07 PQ: 0 ANSI: 4
[ 1060.081841] sd 6:0:0:0: Attached scsi generic sg2 type 0
[ 1060.083326] sd 6:0:0:0: [sdb] 15679488 512-byte logical blocks: (8.02 GB/7.47 GiB)
[ 1060.085260] sd 6:0:0:0: [sdb] Write Protect is off
[ 1060.085264] sd 6:0:0:0: [sdb] Mode Sense: 23 00 00 00
[ 1060.086416] sd 6:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[ 1060.092027]  sdb: sdb1
[ 1060.096224] sd 6:0:0:0: [sdb] Attached SCSI removable disk

parted /dev/sdb
GNU Parted 3.2
Using /dev/sdb
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) p                                                                
Model: JetFlash Transcend 8GB (scsi)
Disk /dev/sdb: 8028MB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: 

Number  Start  End     Size    Type     File system  Flags
 1      131kB  8028MB  8028MB  primary

How to solve this?