Linux exit nano editor All In One

macOS

$ nano ./env.js

# exit 
$ Control + X

# not save
$ n

n 不保存修改

y 保存修改，Enter 退出

修改文件名，会自动创建一个新的文件副本，保存修改的内容，原文件不会被修改掉；

^X means Ctrl + X

for macOS ^X means Contrl + X

the carrot ^ symbol in nano represents the use of the Ctrl key. 
If you are looking for how to exit or quit Nano then, you will press ‘Ctrl + x’ keys with the combination. 

While working on nano, you will press F2 or ^X means Ctrl + X to exit from the current buffer or quit nano. 
After that, you will be prompted to save the current file press ‘y’ and if you don’t want to make any changes then press ‘n’. 

You can also press Ctrl+o to save this file. Then, you need to enter the file name that you want to keep.

refs

https://linuxhint.com/quit_nano/

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来源： https://www.cnblogs.com/xgqfrms/p/16560419.html