QEMU (Quick Emulator) is a free and open-source emulator and virtualization software that allows users to run operating systems and applications designed for one machine on a different machine. It emulates the CPU, memory, storage devices, and other hardware components of the guest operating system, allowing it to run on the host system as if it were a native application. QEMU supports a wide range of platforms and architectures, including x86, ARM, PowerPC, MIPS, and more. It can be used for a variety of tasks, including testing new operating systems, running legacy software, and developing and debugging embedded systems.
![local s = ""
local sstr = string.gmatch(s,'href%s*=%s*"([^"]+)"')
print(sstr()) 增加一个功能，左右两边可以是双引号或者单引号](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162224299866311.png)
![local s = ""
local sstr = string.gmatch(s, 'href%s*=%s*["\']([^"\']+)[\'"]')
print(sstr()) 增加一个功能，开头可以是href、src、action](https://linuxcpp.0voice.com/zb_users/upload/2023/05/202305162217558813401.png)
