I wanted a quick and simple slideshow on a Raspberry Pi

apt-get install fbi
fbi -a -t 5 -noverbose img/*.jpg

Creates a slideshow with auto image scaling, a five second delay, without the status bar using all .jpg images in the img subfolder.

Simple scp from remote to me:

$ scp username@remotehost:file.txt /some/local/directory

Simple scp from me to remote:

$ scp file.txt username@remotehost:remote/directory

Here's a cheat sheet