[Ranger-users] ranger: how-tos or cheat-sheet

[ping]

where can I get the how-tos or cheat-sheet kind of things?
yes I know we have the man page, but I may not want to read through it 
for the commonly used commands.
for example I know yy ,dd, pp can do copy/paste/cut quick, but they are 
my "guess" based on my knowledge of vim.
but why dd won't delete the file? checking the manual I found :delete, 
or even :shell rm %f.
so which is the best?
also I want to make it display sth that does not come by default, like 
displaying a pcap file using tcpdump...
how do I achieve that?

what I'm looking for is :
a list of commonly used commands,
a good tutorials to start with...

are there such things?

regards
ping