dual boot: Ubuntu can not be installed on the second dedicated partition of the unit

I want to install Ubuntu in the second unit of my PC, but since it already has data, I decided to create a dedicated partition.

This is how my disk manager shows the partition of the disks:

Disk partition

However, once in the Ubuntu installer, it will simply not show the partition as free space, in fact it will not show the partition at all

Drivers: Ubuntu 18.04 and Intel Bluetooth stopped working properly

Apparently, nobody likes to deal with bluetooth problems because there are many with Ubuntu; However, I could also try. I had to reinstall Ubuntu 18.04 due to an accident and the bluetooth is able to discover devices, connect, but has problems with the audio devices. Before, it worked perfectly, now it plays through HSP and it stutters with A2DP and the audio configuration does not like to select it. My Wi-Fi card is an Intel 3165 and is using the current version of Intel firmware. The Bluetooth device in question works without additional firmware and still works with other devices (iPhone). Any additional information is easily provided and ANY help is greatly appreciated. Another strange observation, when I position the device in different positions and in the "perfect" position, works well; that makes no sense…

How to configure signed certificates of Root and Leaf SSL in Ubuntu 18.10 Postgresql 11 Database and Windows 10 Power BI plus PostgreSQL?

I have Power BI and PostgreSQL 11 installed on Windows 10 and my main PostgreSQL 11 database on Ubuntu 18.10 Linux. I edited the postgresql.conf Y pg_hba.conf files correctly in the IP addresses that my Windows 10 computer uses with PostgreSQL 11 and Power BI to connect to my Ubuntu PostgreSQL 11 database. However, I got errors in Power BI and could connect manually through the command line .

After solving problems with Microsoft support, they told me:

This indicates that the Postgresql server does not have its certificates configured and, therefore, can not connect to PowerBI. To allow the client to verify the identity of the server, place a root certificate on the client and a sheet certificate signed by the root certificate on the server. To allow the server to verify the identity of the client, place a root certificate on the server and a leaf certificate signed by the root certificate on the client. One or more intermediate certificates (generally stored with the sheet certificate) can be used.

However, I'm confused by the tutorials in

I can not know what steps should be done on my PC with Ubuntu and what steps should be done on my Windows PC. I do not know if special steps are needed to configure Power BI with the certificates. How do I configure my bidirectional certificates?

Can someone offer a very detailed tutorial, tell me & # 39; how & # 39; Read a tutorial or explain the steps in an answer, please?

networks – The Wi-Fi adapter was not found (Ubuntu 18.04)

The question:

I am using a Dell XPS 13 9370, purchased last November. It was working fine with Ubuntu 18.04 until last night.

Now I can not connect to Wi-Fi at all. In "Settings" under "Wi-Fi", I only see "The Wi-Fi adapter was not found". There is also no wireless icon in the top bar. Also, in BIOS under "System Information", the "Wi-Fi Device" is now displayed as "(none)".

I have searched for those with similar problems and I have not had any luck yet.

What I have tried:

  • I used a USB boot to "Test Ubuntu" and the problem was the same there (therefore, that would indicate that a clean installation is not the solution)

  • sudo lshw - network class gives a totally blank output

  • sudo rfkill list it only shows my bluetooth, not wireless

  • sudo apt-get install - reinstall bmwcl-kernel-source it did not work

The laptop is new, and apparently the Wi-Fi card is soldered, so it would be very disappointing if it is a hardware problem and I hope to determine that it is not. I did not leave it or anything, although when the problem started I was running heavy code and the fans were quite noisy.

Any advice would be appreciated!

linux – How do I extend / dev / sda9 or any hard drive from the ubuntu image file?

I have configured Ubuntu in orcl-vBox with 1 GB of space in / var, so while using the system it is full. I have 10 GB of allocated space from where I tried to create the partition and map to / var. But the device / dev / sda9 (extended partition), while disassembly generates a device busy error "as expected.

I rebooted the system from the ubuntu image and copied the content to /. The cfdsk screen is seen below.
enter the description of the image here

My question is:

  1. If I delete the / dev / sda9 mapped in / var using this cfdisk utility and then restart from * .vdi (that is, vbox hdd), will the system work? I am hesitant since I have not changed the / etc / fstab entries that should still show / dev / sda9 is assigned to / var.

  2. I have not created any lvm on purpose for some POCs, so without lvm, what is the improved and practical way to extend / var without any problem of rebooting the system?

Can not update the Ruby version on my ubuntu 16.04

Currently I have Ruby Ruby 2.3.1p112 (2016-04-26) [x86_64-linux-gnu] installed I wanted to update it to 2.6.
For what I did
rvm install ruby

Updating the system ….
Installation of the required packages: gawk, autoconf, automake, bison, libffi-dev, libgdbm-dev, libtool, libyaml-dev, libreadline6-dev …

Failed to run & # 39; Requirements_debian_libs_install gawk autoconf automake bison libffi-dev libgdbm-dev libtoam libyaml-dev libreadline6-dev & # 39 ;,
read /home/aditya/.rvm/log/1555846587_ruby-2.6.3/package_install_gawk_autoconf_automake_bison_libffi-dev_libgdbm-dev_libtool_libyaml-dev_libreadline6-dev.log
Failed installation requirements with status: 100.

repository – Ubuntu 19.04 installs Wine Devel

I saw another post in which I was asked how to install Wine Staging on 19.04 since the repository has not yet been published.

I'm looking to install Wine Devel instead. I was not sure if it was enough to follow the instructions of the other publication and change the staging with Devel or if the procedure would be different? The other post can be found here. Thank you

How to make my Bluetooth keyboard work with Ubuntu 18.04?

I just bought a new Bluetooth keyboard and it will not work with Ubuntu 18.04. Most of the time, the pairing fails. On the rare occasions when it worked, the keystrokes were delayed (delay after pressing, or a key press produced several characters) until the connection was interrupted.

What I did:

  • Matched the keyboard with my smartphone: it works
  • Paired an Apple Bluetooth keyboard with my ubuntu: it works

I'm not familiar at all with solving bluetooth problems.

Using bluetoothctl, I tried to manually trust, link and connect to the keyboard. The pair fails

par 76: 11: 02: 01: 00: C0
Trying to pair with 76: 11: 02: 01: 00: C0
Failed to pair: org.bluez.Error.Failed

Here is the status of the bluetooth service:

XPS: ~ $ systemctl status bluetooth.service
● bluetooth.service - Bluetooth service
Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor default: enabled)
Active: active (in execution) from Sat 2019-04-20 11:24:42 CEST; 5 hrs 53 min ago
Docs: man: bluetoothd (8)
Main PID: 1053 (bluetoothd)
State: "Running"
Tasks: 1 (limit: 4915)
CGroup: /system.slice/bluetooth.service
└─1053 / usr / lib / bluetooth / bluetooth

avril 20 13:06:10 bluetoothd Eric-XPS[1053]: connection error: the host is inactive (112)
avril 20 13:06:29 bluetoothd Eric-XPS[1053]: Can not get HIDP connection information
April 20 13:06:35 bluetoothd Eric-XPS[1053]: connection error: the host is inactive (112)
avril 20 13:06:51 bluetoothd Eric-XPS[1053]: Can not get HIDP connection information
avril 20 13:06:57 bluetoothd Eric-XPS[1053]: connection error: the host is inactive (112)
avril 20 13:07:09 bluetoothd Eric-XPS[1053]: Can not get HIDP connection information
April 20 13:07:14 bluetoothd Eric-XPS[1053]: connection error: the host is inactive (112)
avril 20 17:03:23 bluetoothd Eric-XPS[1053]: 76: 11: 02: 01: 00: C0: error update services: Entry / exit error (5)
avril 20 17:05:01 bluetoothd Eric-XPS[1053]: Reject the connection of the input device: there is no such file or directory (2)
avril 20 17:05:01 bluetoothd Eric-XPS[1053]: Reject the connection of 76: 11: 02: 01: 00: C0: unknown device

And here is the hardware:

Eric-XPS: ~ $ lsusb
Bus 004 Device 001: ID 1d6b: 0003 Linux root hub Foundation 3.0
Bus 003 Device 002: ID 0b95: 7720 ASIX Electronics Corp. AX88772
Bus 003 Device 001: ID 1d6b: 0002 root hub of Linux Foundation 2.0
Bus 002 Device 001: ID 1d6b: 0003 Linux root hub Foundation 3.0
Bus 001 Device 003: ID 0c45: 670c Microdia
Bus 001 Device 002: ID 0cf3: e300 Atheros Communications, Inc.
Bus 001 Device 007: ID 0951: 1665 Kingston DataTraveler SE9 64GB Digital Technology
Bus 001 Device 005: ID 1c4f: 0026 Micro Keyboard SiGma
Bus 001 Device 001: ID 1d6b: 0002 root hub of Linux Foundation 2.0

What do you suggest to solve problems and, ultimately, make this work?

Low performance of Keras with the server Ubuntu 18.04 and Nvidia RTX 2080

My configuration:

Ubuntu Server 18.04.2
Nvidia RTX 2080
Driver version: 410.104
Cuda version: 10.0

Keras version:

Using the TensorFlow backend.

Tensorflow version:


If I execute the following reference Keras code:


I get between 1 and 4 seconds per time, in line with the results obtained with a much slower GPU ("2 seconds per time on a K520 GPU"). According to the following two sources, you should get much better results:



That I have to do ?

Delete everything and compile from the source?

gnome terminal – Several of my ubuntu applications did not open at all

Most of the applications that I need currently do not work, even after restarting several times and trying many suggestions online. It started when I tried to upgrade from Ubuntu 18.10 to 19.04. I opened the software update program and it gave me an error about the corruption of my python3 file or something similar. I found a guide on how to solve this problem and executed the following command: sudo ln -sf /usr/bin/python2.7 / usr / bin / python but I realized that it was for a different version of python (after I ran it). When I tried to open the software updater again, it did not open. I looked for solutions to start this from the terminal or other places, but I discovered that the terminal did not open either. I do not know what's going on, and I'm too linux to fix it, so I ask here.