Windows 7 update 0x80072EFE error and 0x80092004 error
I guess you already read a whole bunch of documents/webpages mentioned that the error was caused by time synchronization. It may be, but not always especially after Windows 7 stopped…
Category: Computer and Network
Increase the youtube download speed
When I am using youtube-dl recently, I found the speed drops a lot. It was 5-6Mb normally but recently it’s just half megabytes. The solution is that use aria to…
Delete Mac ._ dotfile under ubuntu
Using find, from the parent, recursively: After checking append -delete to remove the files:
How do I keep using Google Picasa?
I use Picasa for years and decades, I still think it is the best photo management software. Forget the mac version, Picasa is a 32-bit application, and macOS from Catalina…
How to extend VirtualBox virtual disk size?
Shut down the virtual machine Right-click the virtual machine item, select “Show in File Manager”, the file manager window pops up Right-click the virtual machine item from the list, select…
Find Files Containing Specific Text in Linux
grep -iRl "your-text-to-find" ./ Here are the switches: -i – ignore text case -R – recursively search files in subdirectories. -l – show file names instead of file contents portions.…
一個關於牌九與概率的統計
最後還是動用了perl才解決的問題，牌九共32張牌，其中11對文子，10個武子，文子是重複的，武子不重複，排列組合是32×31/2=496，在按實際牌統計中，要注意11對文子牌的出概率是1/32×1/31，而不是2/32×1/31，或者說(2/32×1/31)/2 按牌面排 按概率排 Sheet 1: 按牌面排 至尊寶 1*1 1 0.002016129032258 天拖寶 2*1/2 1 0.002016129032258 地拖寶 2*1/2 1 0.002016129032258 人拖寶 2*1/2 1 0.002016129032258 鵝拖寶 2*1/2 1 0.002016129032258 梅拖寶 2*1/2 1 0.002016129032258…