This command configures the eth0 network interface to obtain its IP address and other network configuration parameters dynamically from a DHCP server. Once this command is executed, the eth0 interface will send a DHCP discovery message to the network and receive a response containing the assigned IP address, subnet mask, gateway, and DNS servers, among other settings.
In summary, this command enables automatic network configuration for the eth0 interface by requesting configuration information from a DHCP server.
![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)
