I put the command sudo gainroot and then i typed apt-get, i`m a begginer in linux, i have to put rootsh then gainroot then type apt-get ?

EDIT: I`m trying right now, with rootsh and still the same problem, however now i know that sudo gainroot and rootsh are the same, any suggestion ? still having the same problem.When i`m running the apt-get install speedpatch i ghet this:
Reading packages list...Done
Building dependecy tree
Reading state information....Done
E: Couldn`t find package speedpatch
/Home/user #


Befor i install any speedpatch or batterypatch i have to have some program into my phone? I mean that speedpatch it must be downloaded from somwhere and after the patch is in my phone then i have to try running the install command?