You can log in to a Windows ECS using either VNC or MSTSC provided on the management console.
Use the password obtaining function provided by the management console to decrypt the key file to obtain a password.
For details, see Obtaining the Password for Logging In to a Windows ECS.
For details, see Remotely Logging In to a Windows ECS (Using VNC).
For details, see Remotely Logging In to a Windows ECS (Using MSTSC).
You can log in to a Linux ECS using either VNC or SSH key provided on the management console.
For details, see Remotely Logging In to a Linux ECS (Using VNC).
When you log in to the ECS using the SSH key, bind an EIP to the ECS.
For details, see Remotely Logging In to a Linux ECS (Using an SSH Key Pair).
For details, see Scenarios and Disk Partitions.