best easy know 1、auth != null – only auth pass user ( login success user) 2、$uid === auth.uid – usually only data owner can read or modify $userId === auth.uid ========== 1、only admins group can wirte data a. Database data add admins -> add uid:true (uid -> user in admins group) b. Database rule add { “rules”: { “admins”:{ “.read” : “auth != null && root.child(‘admins’).hasChild(auth.uid)”, “.write” : “auth != null && root.child(‘admins’).hasChild(auth.uid)” } } } ...

https://forum.ionicframework.com/t/push-notifications-with-ionic-2/63851/4 https://github.com/fechanique/cordova-plugin-fcm ===== https://www.youtube.com/watch?v=7yXtzhqT1uk https://medium.com/@ankushaggarwal/push-notifications-in-ionic-2-658461108c59#.ff6hz41ot ．sender_id who is sender or This guy is send message. ．FCM_token (api_key) it’s right to use FMC, who get token, then can send ．Device token this device (which device) Where is come from? ．sender_id 、 FCM_token from FCM (firebase) ．Device_token from device How to get? ．sender_id 、 FCM_token ： login firebase console -> settings -> colud messageing ．Device_token ： If ionic2, when you use Push @ionic/cloud-angular push.register().then(t: PushToken) this time get Push Token. see video 7:54 ...

1、crate virtualbox vm, install ubuntu 16 This step have many tech, just find on google ps: start Virtual Box in background make link, link content is vboxheadless -startvm “your vm’s name” check internet is ok~~ 2、Use account that when you install ubuntu, create user account. Now example username is “Ubuntu”. Login Ubuntu use “Ubuntu” account. see https://www.apachefriends.org/download.html choese 7.0.13 / PHP 7.0.13 wget https://www.apachefriends.org/xampp-files/7.0.13/xampp-linux-x64-7.0.13-1-installer.run chmod +x xampp-linux-x64-7.0.13-1-installer.run install ...

http://grapesjs.com/

http://www.freebuf.com/sectool/123907.html http://www.freebuf.com/sectool/104524.html 在这个例子中，我直接在一个临时的容器上运行“remnux/metasploit”，退出的时候会消失（“rm”功能类似）。“-it”让你能够通过shell与容器进行交互。 为了保存容器的相关数据，我使用“-v”参数来将容器目录映射到我主机的目录上。我将使用”~/.msf4”目录来存放Metasploit Framework的配置文件。主机上的“/tmp/msf”目录将会存储其他数据，比如你可能从目标系统获取的数据。 参数“-p”对容器内部的端口进行映射。上面的例子用443端口来接收反弹shell的https连接。