Nano editor: keyboard shortcuts

Ctrl+X Exit the editor. If you've edited text without saving, you'll be prompted as to whether you really want to exit.
Ctrl+O Write (output) the current contents of the text buffer to a file. A filename prompt will appear; press Ctrl+T to open the file navigator shown above.
Ctrl+R Read a text file into the current editing session. At the filename prompt, hit Ctrl+T for the file navigator.
Ctrl+K Cut a line into the clipboard. You can press this repeatedly to copy multiple lines, which are then stored as one chunk.
Ctrl+J Justify (fill out) a paragraph of text. By default, this reflows text to match the width of the editing window.
Ctrl+U Uncut text, or rather, paste it from the clipboard. Note that after a Justify operation, this turns into unjustify.
Ctrl+T Check spelling.
Ctrl+W Find a word or phrase. At the prompt, use the cursor keys to go through previous search terms, or hit Ctrl+R to move into replace mode. Alternatively you can hit Ctrl+T to go to a specific line.
Ctrl+C Show current line number and file information.
Ctrl+G Get help; this provides information on navigating through files and common keyboard commands.

Ctrl Key Combination	Function Key	Alt Key Combination	Description
^G	F1		Display the help text
^X	F2		Close the current file buffer / Exit from nano
^O	F3		Write the current file to disk
^J	F4		Justify the current paragraph
^R	F5		Insert another file into the current one
^W	F6		Search for a string or a regular expression
^Y	F7		Move to the previous screen
^V	F8		Move to the next screen
^K	F9		Cut the current line and store it in the cutbuffer
^U	F10		Uncut from the cutbuffer into the current line
^C	F11		Display the position of the cursor
^T	F12		Invoke the spell checker, if available
^_	F13	M-G	Go to line and column number
^\	F14	M-R	Replace a string or a regular expression
^^	F15	M-A	Mark text at the cursor position
	F16	M-W	Repeat last search
		M-^ or M-6	Copy the current line and store it in the cutbuffer
		M-}	Indent the current line
		M-{	Unindent the current line
^F			Move forward one character
^B			Move back one character
^Space			Move forward one word
		M-Space	Move back one word
^P			Move to the previous line
^N			Move to the next line
^A			Move to the beginning of the current line
^E			Move to the end of the current line
		M-( or M-9	Move to the beginning of the current paragraph
		M-) or M-0	Move to the end of the current paragraph
		M-\ or M-|	Move to the first line of the file
		M-/ or M-?	Move to the last line of the file
		M-]	Move to the matching bracket
		M-- or M-_	Scroll up one line without scrolling the cursor
		M-+ or M-=	Scroll down one line without scrolling the cursor
		M-< or M-,	Switch to the previous file buffer
		M-> or M-.	Switch to the next file buffer
		M-V	Insert the next keystroke verbatim
^I			Insert a tab at the cursor position
^M			Insert a newline at the cursor position
^D			Delete the character under the cursor
^H			Delete the character to the left of the cursor
		M-T	Cut from the cursor position to the end of the file
		M-J	Justify the entire file
		M-D	Count the number of words, lines, and characters
^L			Refresh (redraw) the current screen
		M-X	Help mode enable/disable
		M-C	Constant cursor position display enable/disable
		M-O	Use of one more line for editing enable/disable
		M-S	Smooth scrolling enable/disable
		M-P	Whitespace display enable/disable
		M-Y	Color syntax highlighting enable/disable
		M-H	Smart home key enable/disable
		M-I	Auto indent enable/disable
		M-K	Cut to end enable/disable
		M-L	Long line wrapping enable/disable
		M-Q	Conversion of typed tabs to spaces enable/disable
		M-B	Backup files enable/disable
		M-F	Multiple file buffers enable/disable
		M-M	Mouse support enable/disable
		M-N	No conversion from DOS/Mac format enable/disable
		M-Z	Suspension enable/disable