shell delete characters you entered when reading input from the keyboard

[Article] Reference: stty command usage of the whole solution

[Article] Reference: shell - Backspace abnormal when read (shell modified to delete character )

　　stty srase ^h

　　read -p "Enter parameter information"

　　Add stty erase ^ h command before the read command can be used normally to delete characters operate in the input parameters, and will not appear ^ H characters.

　　When a read command -n 3 parameter (limit input indicates three characters), stty command will fail.