networking – Wired network connection stops working after OS update

Literally, in Settings window OS doesn’t see any connection as though there is no cable connected to my PC. It seems it erases or doesn’t recognize the network driver. So such a situation happens every 1-2 weeks in the morning after I turn on the PC and then I have to reinstall the driver each time. Frankly, I’m not 100% sure that it happens after installing updates, because I don’t manually install updates like with sudo apt update (maybe OS does it automatically?).

My motherboard is ASUS Z490-A Pro (it was released in this year). Ubuntu version is 20.04. When I installed Ubuntu there was no driver for the corresponding network adapter coming along with the distribution, so I had to check Realtek website to download the driver.

Ubuntu developers definitely didn’t include this driver in the distribution.

How can I avoid installing the driver every time Ubuntu updates? (and so maybe I should tell Ubuntu developers to include this driver into the next Ubuntu updates?)

networking – Wired connection switching from “connecting” to “cable unplugged” in 20.04

I have just made the switch to Ubuntu on my desktop, and I’m having a network problem that I’m not seeing in other threads.

I have an ethernet cable plugged in–it is the same cable that was being used previously, so I know the connection works–but in the Network settings, the Wired connection keeps switching on, trying to connect for a few seconds, and then switching back to “cable unplugged”

I’m trying to install net-tools to work on the issue, but I’m receiving the following error:

E: Unable to locate package net-tool.

Attempts to update my package lists are also failing.

If anyone can help a poor newbie out, I’d be very grateful.

Authorise ssh connection without password for multiple servers in a private virtual network

I’m trying to make a private system with four machines in it, lets call them

Host - IP 1,
Proxy - IP 2,
Server - IP 3,
Application - IP 4

A user connects to the host via ssh (I have this working without requiring a password), from the host, you can then connect to the proxy, application or server using ssh, but requires a password. I wish to be able to ssh without needing a password. However, I’m not quite sure how to implement this, but its clearly wrong, as the connection just hangs when i try it, the user has an account on all so “john” exists on all machines, currently I am simply connecting “john” to “john”, so I don’t have do do the whole name@server thing (but maybe its better to do that idk, I can connect to john using ‘ssh IP’ or to a different user using ‘name@IP’)

As an example, I have the following (is the hostname required? the application doesn’t necessarily have one), this variation hangs

Host IP 3
HostName ServerHostName
User john
ProxyJump IP 1

This variation still requires the password

Host IP 1
HostName ServerHostName
User john
ProxyJump IP 3

How exactly do I implement the .ssh/config file to correctly connect without requiring a password?

A diagram of the connection

Diagram of desired connection

oracle – Application connection pooling load balancing the transactions on 18c RAC

Application connecting a 2 node 18c RAC.
JVMs are using connection pool and transactions are routed to the nodes via the connections in the pool. So the initial load across the nodes are distributed by SCAN listener. But the question is how does the existing connections in the pool distributes the next slot of transactions evenly across the 2 nodes, so that they are equally balanced.

How would I install / use my specific TpLink Realtek USB Wireless Adapter into Ubuntu 20.04 LTS without internet connection?

I use a TpLink Archer, it’s a Realtek, and I want to use it / install it into my Ubuntu. I have 2 drives, the first drive (C:) is Windows, which the USB Wireless Adapter works fine there, I just need it to work on my Ubuntu (D:) drive. My Ubuntu version is 20.04 LTS.

Here’s more information of the USB:

ID: 2357:0115

WI1 chip1: Realtek RTL8812BU

How can I install this into my Ubuntu? I am having trouble, and I’ve been searching everywhere but couldn’t find a solution.

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I’ve built a simple API with ASPNET Core and HotChocolate (GraphQL) and I’m having a tad of a difficulty.

I’m doing a bunch of load tests to see how many connections the server can handle at once and I’ve noticed that when I perform 50 requests per second for over a minute – the server quickly runs out of threads and connection slots.

That thing, of course, works as it should – obviously a limit to threads and connections should exist – but what is weird is that that when connections eventually drop off and the entire log has been written down – the memory usage stays at high 30-50%.

Is it related to a bad disposal of contexts or what?

sharepoint server – Where to store connection string for WCF service that uses EF

I have a WCF service deployed to ISAPI that uses EntityFramework, however, I cannot find where and how can I store the connection string so it can be automatically retrieved when the DBContext is initialized in the application constructor of entity framework initialization, specifically, base(“name=ConnectionStringName”).

PS: The deployed WCF project doesn’t have a web.config