How to quickly make DNS changes take effect

How to quickly enable the DNS modification to take effect OSX, Chrome, and andDNS. during development, it is often necessary to bind some ip addresses to the domain name and then switch frequently, in linux, how can I quickly modify DNS information? 1. use the dig command to check whether the ip address corresponding to the domain name has taken effect. shell $ diggrepal... how to quickly enable the DNS modification to take effect OSX, Chrome, and DNS are often bound to some ip addresses for the domain name during development, and then need to switch frequently, in linux, how can I quickly modify DNS information? 1. use the dig command to check whether the ip address corresponding to the domain name has taken effect. shell $ dig grepalex.com; answer section: grepalex.com. 3600 in a 66.216.100.1402. in the address bar, enter the following command to invalidate the Browser DNS cache: // net-internals/# dns 3. although the Browser DNS cache has expired, the operating system may still have a layer of DNS cache, so we can use the following command to understand the OS DNS cache shell $ sudo killall-HUP mDNSResponder