You need to use screen, I am not sure what version of linux you are using so not but it should be in your package manager depending on what flavor of linux that device has.

command would like something like this  screen Sudo ./cgminer --hexminerc-voltage 1100 --hexminerc-options 16:1500 --set_default_to_c

There are a lot of options Screen has I would suggest reading the Man page for that.