login into your box with telnet
call the directory by typing the below command and press enter
cd /var/bin use the command to list all the files in the directory
ls after this a list of files should be listed

look closely at the filename of oscam

and type the following replacing filename.ext with the one you see in the list
./filename.ext & depends what you have in the config files you may see the debug on screen or just nothing happens on screen

you can open another telnet session in case needed and type the following command to confirm that oscam is running, if it is running you should see in the list filename.ext (depends on the oscam name)
ps -A