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Our most-read tips this week:Websites protected by Cloudflare's web firewall may recently display [email protected] instead of an email address. This is to protect the mailbox from spam; the real address is supposed to be displayed in the browser via JavaScript. This does not seem to be working for several major browsers at the moment, so instead of the address, [email protected] is displayed, with a link to an explanation.You can work around this by turning off the Cloudflare... Read more...By default, the Linux screenshot tool scrot in newer versions doesn't overwrite an existing file, even if you specify a filename. Instead, it creates a new file with an appended number, such as _000, _001, or _002. However, there is an easy way to make scrot overwrite the existing file with the given filename. This is particularly useful if you want to replace an old screenshot with a new one.To achieve this, simply add the -o option (for "overwrit... Read more...No protocol specifiedError: Can’t open display: (null)Failed creating new xdo instanceIf you're using a Linux system, you might encounter this error message: "No protocol specified - Error: Can't open display". This might occur when trying to start a graphical application. The error indicates that you are unable to access the X server, which is responsible for displaying graphical content. In our example, we try to run the xdotool. ... Read more...Unlike Apple's macOS system, drives on the Raspberry Pi with Raspbian cannot be safely removed or ejected directly from a folder window: On the Mac, there is a button for ejecting the drive in the folder's view. This is missing under Raspian: Here drives are also shown as folders in the sidebar, they are usually mounted under "media".To eject and unmount these drives safely, there is the possibility to do this from the console. But you can also ej... Read more...
UnBounce is a practical, but often not very flexible editor for websites and landing pages: With it, individual pages can be clicked together with little effort. If you activate the mobile view, UnBounce distinguishes between desktop computers and mobile devices such as a smartphone or a tablet: You can also create completely different pages for both sizes.However, you often want to know whether UnBounce is currently displaying the desktop view or the ... Read more...To change the volume of the Raspberry Pi and turn the computer up or down, you don't need a mouse or screen: This can also be done over the network via SSH. To do this, connect to the Raspberry (tip: Connect via SSH and activate SSH). Then you can activate the volume control with the following command:alsamixerThis starts the setting program shown in the picture above. Use the arrow keys (up and down) to change the volume: this is also shown gr... Read more...The new Raspberry Pi 4 seems to have problems with the WiFi, if a screen with a high resolution is connected via HDMI: The small computer even has two Micro-HDMI outputs in version 4, which can deliver a 4k image. If the Raspberry Pi is to be used as a media player on a high-definition TV, however, it is better to connect it via LAN cable: With the Pi 4 this is now also possible with Gigabit.At higher HDMI resolutions, the video signal should inter... Read more...The Raspberry Pi usually comes with a standard password for logging in. However, this should be changed quickly as it is a security risk: Anyone else can log in with the same password. Since mid-2019 Raspbian does not allow short passwords anymore: They must contain at least six letters.If you still want a shorter password (or no password at all), you can use a trick to set it up: To do this, you don't change it directly your your own user, usually... Read more...
After the first setup of the Raspberry's microSD card you can start the small computer: Once it has loaded all services, you need a password to log in: The Raspberry Pi default password for the login under Raspbian is always the same: No matter which Raspberry Pi and which Raspbian version you use, you can always log in with the same password. Therefore you should change the default password quickly: Otherwise other users will also have easy access to ... Read more...In Google's search engine and the Google services are hidden numerous "eastereggs": These small jokes or even whole games can usually only be found by chance. Google shows one of the hidden eastereggs when you search for "<marquee>". This is the HTML command for a scrolling text. The Marquee command was introduced by Microsoft's Internet Explorer and are now also supported by the Firefox and Chrome browsers: However, the Firefox developers have c... Read more...
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Most-read tips:
Wieviel MB sind ein GB (Gigabyte)
Ein Gigabyte (GB) ist eine Speichergröße aus dem Computerbereich und wird als Angabe für die Größe von Festplatten, Speicherkarten, USB-Sticks oder RAM Bausteinen verwende...
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Festplatte formatieren mit Windows Vista
Beim Formatieren einer Festplatte oder Partition werden alle darauf befindlichen Daten unwiderruflich gelöscht. Sichern Sie also vorher alle wichtigen Dateien an einer anderen Ste...
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Irfanview: Bilder in andere Formate umwandeln
Mit dem kostenlosen Bildanzeige-Programm Irfanview lässt sich viel mehr machen, als nur Bilder anzeigen: Irfanview auch ein praktischer Helfer, um Bilder aus dem einen in ein ande...
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BIOS Schnell-Anleitung: Wie komme ich ins BIOS?
Das BIOS (Abkürzung für "Basic Input Output System") ist die Firmware eines PCs. Sie wird direkt nach dem Einschalten des Computers geladen und führt einen PC-Test aus. Dabei pr...
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