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 Login Using VNC.
For details, see Login Using MSTSC.
You can log in to a Linux ECS using either VNC or SSH key provided on the management console.
For details, see Login Using VNC.
When you log in to the ECS using the SSH key, bind an EIP to the ECS.
For details, see Login Using an SSH Key.
For details, see Scenarios and Disk Partitions.