SCRT connection Linux, edit file backspace garbled problem

Just newly built a virtual machine, ready to do python learning, when using SCRT connection, when editing the file or into the Python interface editing, when using the BACKSPACE key, there is garbled. You need to hold down the CTRL key +backspace key to eliminate, too troublesome.

Would have thought is less installed what software caused, because the machine is minimized installation, but later with Xshell test, Xshell will not appear this problem, so is SCRT configuration caused, later on the internet, as long as the simple adjustment on the line

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For example, the two options in the graph tick on the line, the problem is resolved.

These are the most basic problems, but because of lack of experience, do less, unexpectedly do not know.

SCRT connection Linux, edit file backspace garbled problem