Learn Enough Command Line Part 1, 2

Tab completion: press tab to auto-complete
redirect operator >
append operator >>

ls -rtl
list by reversed time of modification (long format)

ls -a
list all

*
wildcard (*.txt)

mv, cp, and rm
move, copy, remove

touch
create file

echo
print

^C, ^A, ^E, ^L
quit, start-of-line, end-of-line, clear