vim

some times without `sudo` we just have read-only permission

create a new file via vim

vim ${filename.suffix}

:q: quit vim
:q!: quit, discard all changes
:wq: save and quit

i: insert
:: cmd
v: visual

h: <
j: v
k: ^
l: >

x: delete
dd: quickly delete the whole line
u: undo

:set number: show line numbers
:2: navigate to line 2
i: get into insert mode, then use j and k to navi
Esc: quit insert mode

+p: paste text from clip board
:w: save the changes
:!: run command