What is the purpose of the script update-hosts.js?

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javascriptupdate-hosts.js// 使用管理员权限运行var request=require('sync-request');var fs=require('fs');var url='https://coding.net/u/scaffrey/p/hosts/git/raw/master/hosts-files/hosts';var co=request('GET', url).getBody().toString();

// 请用管理员权限运行 var request = require('sync-request'); var fs = require('fs'); var url = 'coding.net/u/scaffrey/p/hosts/git/raw/master/hosts-files/hosts'; var co = request('GET', url).getBody().toString(); fs.renameSync(`C:/windows/system32/drivers/etc/hosts`, `C:/windows/system32/drivers/etc/hosts.bak`); fs.writeFileSync(`C:/windows/system32/drivers/etc/hosts`, co); console.log('done..');