Type this command to your terminal/putty software:
apt-get update
apt-get install -y git-core
git clone https://github.com/W3LLLL/PUNNYSENDER.git
cd PUNNYSENDER
chmod 777 install.sh
bash install.sh
Note : Whenever you logout the ROOT from putty remember to put command cd PUNNYSENDER
when you relogin.
If you wanna re install sneder put this command cd ..
then command rm -rf PUNNYSENDER
first