vi를 종료하는데 이런 차이가 있는 줄 몰랐네. vi에 익숙해지는 길은 참 멀다.

• :q to quit (short for :quit)
• :q! to quit without saving (short for :quit!)
• :wq to write and quit (think write and quit)
• :wq! to write and quit even if file has only read permission (if file does not have write permission: force write)
• :x to write and quit (similar to :wq, but won't write if there are no changes)
• :qa to quit all (short for :quitall)

ZZ와 ZQ도 종료 명령어로 사용할 수 있다.

Or you can press Esc ZZ (Esc Shift+Z Shift+Z) to write/save if the file was changed, then quit.

Or if you don't want to save changes you can use ZQ instead.

위 내용은 How to exit the VIM editor? 글의 답변 글에서 가져온 내용이다.