programming in PUTTY

i can get into putty, but i have no knowledge of the linux commands used to create a file

can someone please step by step how i would from the log in make a simple program and run it.

1. log in to server
2. touch filename
3. pico filename
4. write some code
5. save some code
6. chmod +x filename (alternatively, on debian/ubuntu, sudo chmod +x filename)
7. ./filename