Mac connects to Alibaba Cloud server

1. Connect to Server via command line and set up

　1.1 Connect Server

　#: ssh root@hctec.top

　ssh: remote connection tool

　root: remote server username, here I use: root user

hctec.top: is the domain name of the server, of course you can use IP directly　

　

　1.2 Directly connect to the Server without a password (we use the ssh-copy-id tool to verify the secret key)

　#: brew install ssh-copy-id

　#: ssh-copy-id root@hctec.top

Brew: brew, also called Homebrew, is a software package management tool on Mac OSX. It can easily install or uninstall software on Mac. It only requires one command, which is very convenient. Reference: brew installation and use

The function of brew is similar to apt-get under ubuntu system

2. ECS instance:

　2.1 Instance Snapshot

Personal understanding: It can be used as a backup of the system. When the system encounters an irreparable operation, the system can be restored by rolling back the instance;

　2.2 System image

We can make a system image based on the snapshot of the system disk, so that we do not need to repeatedly configure the server.

　2.3 Security Group

Specify intranet & public network access rules