When Windows cannot detect a second monitor, first check whether the physical connection is normal, including power supply, cable plug-in and interface compatibility, and try to replace the cable or adapter; secondly, update or reinstall the graphics card driver through the Device Manager, and roll back the driver version if necessary; then manually click "Detection" in the display settings to identify the monitor to confirm whether it is correctly identified by the system; finally check whether the monitor input source is switched to the corresponding interface, and confirm whether the graphics card output port connected to the cable is correct. Following the above steps to check in turn, most dual-screen recognition problems can usually be solved.

The operating system is the basic software for managing hardware resources, running programs, and providing user interaction interfaces. It coordinates the relationship between hardware and software and is responsible for memory allocation, device scheduling, file management and multitasking. Common systems include Windows (suitable for office and gaming), macOS (Apple devices, suitable for creative work), Linux (open source, suitable for developers), and Android/iOS (mobile device system). The choice of ordinary users depends on the usage scenario, such as software compatibility, security and customization requirements. How to view system information: Use winver command for Windows, click on the machine for macOS, use terminal commands for Linux, and find the phone in settings. The operating system is the underlying tool for daily use,

To view Git commit history, use the gitlog command. 1. The basic usage is gitlog, which can display the submission hash, author, date and submission information; 2. Use gitlog--oneline to obtain a concise view; 3. Filter by author or submission information through --author and --grep; 4. Add -p to view code changes, --stat to view change statistics; 5. Use --graph and --all to view branch history, or use visualization tools such as GitKraken and VSCode.

To delete a Git branch, first make sure it has been merged or no retention is required. Use gitbranch-d to delete the local merged branch. If you need to force delete unmerged branches, use the -D parameter. Remote branch deletion uses the gitpushorigin-deletebranch-name command, and can synchronize other people's local repositories through gitfetch-prune. 1. To delete the local branch, you need to confirm whether it has been merged; 2. To delete the remote branch, you need to use the --delete parameter; 3. After deletion, you should verify whether the branch is successfully removed; 4. Communicate with the team to avoid accidentally deleting shared branches; 5. Clean useless branches regularly to keep the warehouse clean.

When encountering the problem of printing task stuck, clearing the print queue and restarting the PrintSpooler service is an effective solution. First, open the "Device and Printer" interface to find the corresponding printer, right-click the task and select "Cancel" to clear a single task, or click "Cancel all documents" to clear the queue at one time; if the queue is inaccessible, press Win R to enter services.msc to open the service list, find "PrintSpooler" and stop it before starting the service. If necessary, you can manually delete the residual files under the C:\Windows\System32\spool\PRINTERS path to completely solve the problem.

AMA in the currency circle is the abbreviation of Ask Me Anything, which is literally translated as "ask me any questions". This is a form of interaction between project parties and community members. Project teams usually broadcast live on specific platforms, such as Telegram groups, Discord servers, or via Twitter Spaces, to open questions to participants. Community members can take this opportunity to directly raise questions about any aspects such as technology, economic model, marketing promotion, roadmap, etc. to the core members of the project.

Kevin O'Leary highlights AI's transformative impact on reducing customer acquisition costs, reshaping investment strategies, and the US-China tech rivalry.

To adjust the Dock on Mac according to usage habits to improve efficiency, you can follow the following steps: 1. Adjust the size and position: Go to "System Settings" > "Desktop and Dock", check "Automatic Show and Hide Dock", slide the bar to adjust the icon size; select the left, bottom or right place in "Dock Position". 2. Add or remove apps and folders: Drag the app from "Applications" to the Dock, and drag out the outside of the icon to remove the item. 3. Customize behavior and animation effects: Set click icon to display recent documents, window thumbnail previews, and use dividers or empty launchers to improve organization and quickly return to the desktop. Turning on the auto-hide function helps save screen space and make your work more focused.