Hi thanks for your help ... I sort of follow the instructions.
I set in the console frequency 100 (in bash write ./cgminer -2pac -freq 100 et ... ) , starts at 100, then goes back to 75, weird
My Pi only seems t be able to run 2 2pac, I assume my powered hub is not good enough
0 and 1 running at 75 mhz , and 2 is OFF . if I enable 2 , it will just run at 0.
NB I am just starting in mining and have limited linux knowledge.
welcome to the club

I've put a text file on the raspbian desktop with the lines below in it.
I just need to open it and copy paste the first 2 lines in the console to run it and that sudo leafpad one to edit the config
cd ./mining/2pac/cgminer
sudo ./cgminer
#edit settings
sudo leafpad /root/.cgminer/cgminer.conf
#show devices
./cgminer -n
#run miner at specific freq
./cgminer --gekko-2pac-freq 150