#Write or save the file, but don’t exit
:w
#Write out the current file using sudo
:w !sudo tee %
#Write or save and quit
:wq (or) : x (or) ZZ
#Quit ( fails if there are unsaved changes )
:q
#Quit and throw away unsaved changes
:q! or ZQ
#Write or save and quit on all tabs
:wqa