network – the Internet connection on the Ubuntu virtual machine works after reboot, then stops

I successfully start the Internet connection on my Ubuntu 19.04 virtual machine (in VirtualBox).
I checked this by connecting to the company's internal page, which is authorized by proxy.
The proxy is configured by Wired settings -> Network Proxy -> Automatic.
There are no other changes on this machine, it is a new installation.

Then I try to wget http://google.com and it gives me The network is inaccessible Error.
After that I try to wget the same site as before with result: Temporary failure of name resolution.

When I restart, I can connect to the first site without problems.

In addition, Network connection the application is launched, Hotspot connection window opens with information Error while resolving "nmcheck.gnome.org": temporary failure of name resolution. inside – I do not know what it is and why it appears.

The question is: what is happening on my virtual machine? Why does the connection seem to be there, and then go?

In addition, a question mark is displayed at the top of the wired connection icon (you do not know if this is related).

The Api call that uses MySQL stops responding

It seems that our MySQL stops working suddenly at night.
We use Loopback2.
I check the MySQL general logs.
but it only shows queries that have been sent to MySQL.
How do I know which is the last query executed successfully?
Or how to find the root cause of this scenario?

shutdown – (K) Ubuntu stops when I kill X server

When I kill the X server (ctrl-alt-backspace) in a KDE session in Ubuntu Disco, Ubuntu stops.
This means that the X server is killed, then a systemd line counts down from 1 minute 30 to 0, and then the system shuts down instead of just showing the connection manager again.

Why does it behave so and how can I get it back as usual?

Peerfly stops


A flawless stay

PeerFly was the No. 1 affiliate network in the world according to the 2015 ranking of the blue book of revenue performance.

As of August 30, 2019, their site is still online_ firefly

After almost a wonderful 11 ​​years, PeerFly will cease normal business on Wednesday, July 31, and close the PeerFly Affiliate Network.
SEMrush

It's really going guys. Sad, though, that's it. It's time to diversify.

network – Ethernet stops working repeatedly?

I have faced this problem of Ethernet connection failure sooner. After trying various solutions, he finally declared to work. The last was the one on youtube. I agree that this was not the best way to solve such a problem.
I have therefore gone through this crucial question. here is
info wirelessly paste.ubuntu.com.
He seems to have collected more than I could have thought.
I've gone through the following questions

Ethernet connection issues on Ubuntu 16.04 (the Ethernet controller is different from mine, so I do not think the solution can help.)

power – The charge stops suddenly when I try to use the device

This is my first time with a mac computer, I have a macbook pro 2011.

The problem, the charger works well when the laptop is closed or inactive, when I start to use it, such as for example by opening the Finder, the charger lights will turn off and stop charging .

Thank you in advance.

macbook – Thunderbolt 2 Dock – The screen stops working after waking

I've recently purchased an occasional Elgato Thunderbolt 2 dock on eBay and everything seems to work fine, aside from this display problem.

Here are some details of the problem:

  • The monitor is connected to the docking station via the HDMI port of the docking station.
  • On waking, the screen flashes (the blinking that occurs when a screen is connected or disconnected) and the monitor stops working and displays a "No Signal" message.
  • For the display to work again via the dock, the Mac must be restarted.
  • The Ethernet, USB, and dock headphone / microphone ports work when this problem occurs.

Some steps I've taken to try to solve / isolate the problem:

  • Connecting a screen directly from the mini display / lightning port of the Macbook works.
  • Reconnecting the cable from the Thunderbolt screen and flash does not solve the problem.
  • The power cycle of the dock (remove the adapter then put it back) does not work.
  • The use of the second Thunderbolt port on the Macbook does not work.
  • Disconnect the HDMI cable from the docking station and use the second Thunderbolt port from the docking station to connect a screen via a mini display adapter for display does not work.
  • The use of another Macbook (a different model, specifically a Macbook Air) works well.
  • Looking at the console, several log entries appear, suggesting that the HDMI port is reconnecting multiple times:

Console log

My Macbook Details

  • MacBook Pro (Retina, 15 inches, mid-2015)
  • List item
  • OSX Mojave 10.14.6
  • Intel Core i7 2.8 Ghz
  • 16 GB of DDR3
  • 1TB SSD / Flash storage
  • Radeon R9 M370X from Intel Pro / AMD

I have recently performed a new installation, from the OSX catalina beta. So, suggest that this is out of the question again.

Any help is appreciated.

php – When I connect the tables, it stops inserting records and, once the fields are filled, then exports to Excel

When I link the tables, it stops inserting records. Once the form fields are complete, you must export the form to an Excel file while maintaining the same format.

I'm doing this form in php the problem I have, is that when I connect the tables it stops inserting records, if I delete the relationships if it inserts. The biggest problem is that when you finish filling the form, you have to export it to an Excel file. I have already tried it with a php code, but export it without formatting it, I want to export it literally as it is on the screen, please if someone knows how to help me

drivers – the wifi stops working – realtek r8822be – Ubuntu 19.04 – 5.0.0-21-generic – lenovo e485

It appears when the computer goes to sleep, the wifi stops working.

Wifi works in the windows
The lshw-C network indicates that a wifi interface is present
lsmod indicates that the modules are loaded
After searching for a large majority of the day.

-sudo modprobe -r r8822be

-sudo modprobe -r rtwpci

-sudo modprobe r8822be

-sudo modprobe rtwpci

resulted in a restoration once, but the second time it failed.
Additional troubleshooting to restart the network manager worked.

restarting the sudo service network manager

do you need to live on wicked Wi-Fi or can I do anything to make it more reliable? It seems that the form factor m.2 are there other more reliable material choices?

application error – Google stops stopping for the moment

Yesterday I was trying to use Google's voice feature (the one where you say "Hey Google") and then you ask questions.This did not work and I found out later that I was not connected to any network.

Since then, a popup pops up randomly: "Google does not stop".

I tried to clean the cache, as I read in some forums, but that did not do much. It's very annoying because the message appears suddenly and sometimes even three times in a row. I can still use the phone but I really like to get rid of it.

The smartphone is a Motorola G7 Power, the Android version is the 9

Can you help?