Let's make harmony harmonious.
ShortUrl for dotnet 4, dotnet core, .Net 5/6 were published several years ago. Currently, many sites are protected by Cloudflare. It’s time to move ShortUrl into Cloudflare directly.
The ShortUrl for Cloudflare is based on Cloudflare Worker and D1 database. Now you can use this redirector within Cloudflare, enjoying the fastest redirecting and no need a server for hosting ShortUrl anymore.
I manages many server using Ubuntu Server for hosting dotnet apps as service. Recently, they failed one by one. The dotnet services on them cannot start. When typing dotnet –version, it reports
A fatal error occurred. The folder [/usr/share/dotnet/host/fxr] does not exist.The whole problem is we installed the dotnet very early. In that time, we need to install the packages-microsoft-prod due to lack of official support of dotnet from ubuntu. But now it’s changed. Recently, dotnet is listed in the Ubuntu package manager feeds. That leads into the conflict which cause the services cannot start.
The way to fix is easy:
First, lists all installed packages using
sudo apt list --installed | grep dotnetYou may see some like dotnet-host dotnet-hostfxr-6.0 dotnet-runtime-6.0.
Now, removes those package listed using
sudo apt purge dotnet-host dotnet-hostfxr-6.0 dotnet-runtime-6.0Also, packages-microsoft-prod is need to be purged also. To be mentioned, it must be purged instead of removed, which will remove the config file which is very the reason cause the conflicts.
sudo dpkg -P packages-microsoft-prodNow, we can install the dotnet runtime from ubuntu official feeds using some like
sudo apt update && \
sudo apt install -y aspnetcore-runtime-6.0Hope this can save your day.
As many others, you can see many if you google it, my HomePod often don’t know where it is. Not only the weather feedback is useless, but also all tasks based on time are not able to process unpredictably. Many search results say the same steps — reset and switch Location Services in the Home app. But I found another possible issue.
In my home, I have many apple stuffs, including iMac, iPad, iPhone, AppleWatch and of course the HomePod mini. Other than HomePod mini, from some day the iMac cannot get the right time zone automatically. I didn’t know the reason but I can just switch it to set the time zone manually instead. Recently, after my HomePod mini upgraded to version 16, I realize maybe the location problem of the HomePod mini is the same as iMac.
Unlike HomePod mini, iMac is located in Find My more than 5000 mi away from where I can touch it. By asking the current time from HomePod mini, I guess the “location” of my HomePod mini is very same. The funny thing is my iPad is listed with iMac too. Yes, they are on the same table, just in front of me, not 5000 mi away.
My iPad is the 12 inch Pro with cellular. I set it with airplane mode on while keeping WiFi connected when at home. Maybe that make it use wifi and bluetooth to determine the location instead the GPS. After I disabled the airplane mode, my iPad flew to my iPhone after 2 minutes. And iMac did one day later, and the HomePod mini too.
I don’t know why the location service is wrong so far when not using GPS, but the funny thing is all other stuffs choose to believe the locating from iPad, ignoring the iPhone on the same table.
One tip is, when you have the same problem about HomePod mini location service, try to switch off the airplane mode on your iPad may help.
Message Bus is a component provided from SecretNest.info, providing publishing subscription model support within one app.
Source code: https://github.com/SecretNest/MessageBus
License: MIT
Doc: https://messagebus.docs.secretnest.info/
Standard: netstandard 1.3
Packages:
Copyright: SecretNest.info / Allen Cui
Recently, I need to read the data from a code scanner, which is recognized as a keyboard, in the dotnet program development of Linux. Because the program is running background, hosted in systemd, there is no way to get the entered text from console. All devices are presented as files in Linux. Reading the event from keyboard device file /dev/input/eventX is a good choice.
To read from the device in Linux, FileStream need to be created on the device file. Using the method Read() form the instance of FileStream, all key events can be processed one by one. For make it easy, I post the code in GitHub. Nuget package is also presented.
The sad thing is, there is no way to stop the FileStream.Read method except quit the app. The Read method is designed to read at least one byte. If there is no data available currently but not reaching the end of file, it will block and wait. And there is no way to break the waiting. I also tried to use BinaryReader — “Stream was not readable” reported. ReadByte failed in the same way. Cancel the CancellationToken cannot break the ReadAsync either. Setting read timeout is not supported in FileStream. And finally, the Thread.Abort is obsoleted and no use any more.
Is there any approach to cancel the running Read method of FileStream without exiting application?
I have a server using Ubuntu Server 22.04 LTS with nginx and php supported for a long time. Today, after I fire a regular update by using apt update, apt upgrade and a reboot, my web server is down.
When checking the status of nginx, it reports that port 80 is taken:
nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Unknown error)And the lsof command
lsof -i -P -n | grep LISTENreports that port 80 is used by apache2. That’s really weird. This server never has apache configured or started. Who wanna run apache aside nginx in a production environment, uhh?
By checking the log of apt, I found that php8.1 is upgraded with a library named libapache2-mod-php8.1 installed automatically. I don’t find any log related to apache installation. Maybe the apache2 is preinstalled for a very long time but never initiated but the libapache2-mod-php8.1 upgrading process triggered it on.
After I purge apache2* and libapache2-mod-php8.1, the nginx can be restarted without any problem.
I have several generations of NAS from QNAP. I have a, maybe not good, habit of putting them into sleep mode every night. Because there is no one access them overnight, it really help to reduce the noise and not bring much jobs, like entering password for unlocking, other than press the power button to resume.
Several months ago, I brought a new one, TS-873A, found there is no sleep function left. I contacted some other users, who use other new models as well. No one see such a function any more. To make sure it is, I fired a ticket to the help desk, the answer is the same — sleep function is no more supported.
The official documentation says nothing about this change. By searching the reason why sleep mode is missing, only one article saying that SED SSD Storage Pool does not support the S3 Sleep function. But actually, all kinds of SSD/HDD cannot have a good sleep in new models at all.
I don’t know the reason but leave this as a notice to the ones who want to buy a new NAS from QNAP.