Vim

esc+ :w for Saving
esc+ :wq! for save and force exuit
esc + :set numer to get ever Line Numbered
h,j,k,l key for navigation
number+j for moving to that line number
x to delete the text at the current place of the cursor
vimtutor to enter the tutorial mode of the vi editor
f followed by (alphabet to be searched on the same line)
ci+ the name of the tag whose data is to be deleted
BB to navigate word by word
v to Enter the Visual Mode at the Bottom of the Screen and then arrow key to select the text
d to CUT
y to Copy
p to Paste