trouble manually installing SpiderOak

I'm brand new to Ubuntu so I'm at the stage where I follow instructions in a very concrete way, without really knowing what I'm doing. I'm trying to manually install SpiderOak so I DDG'd some instructions. They seem simple enough: Open the terminal, type a command to install the downloaded file.

However, I keep getting the error that says no such file or directory. I'll attach a photo that shows exactly what I'm typing. I'm sure it's something very silly, like one character in the wrong place, but I can't figure it out.

Thanks in advance.

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trouble manually installing SpiderOak