Looks like oscam has disappeared....
I have just run following which I thought should install oscam but it didn't work....
Nope... the OSCam binary file name can also be called something else. It doesn't have to be exactly "oscam".
Even some Enigma2 distributions place the softcam binary file in some folder other than "/usr/bin" (than other, standard, all current Enigma2 distributions).
Try looking through the top or top -c command at the running processes and find the one that could belong to Oscam (for example, look for the startup parameters belonging to the Oscam process).
Or if you have the opportunity, install and use the htop tool / command. This one is more beautiful (more clear) tool.
Look in the contents of the "/etc/init.d" folder to see if there is a shell script (by name) that is intended for starting a SoftCAM.
If you're going to try anything else with the IPK softcam-installers, back up the oscam configuration files you found in your set-top box ! The IPK softcam-installer could delete your current configuration files.