NANO & VIM QUICK REFERENCE
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GNU NANO:
Ctrl + O   Save file
Ctrl + X   Exit editor
Ctrl + W   Search text
Ctrl + K   Cut current line
Ctrl + U   Paste line

VIM:
i          Enter Insert mode
Esc        Return to Normal mode
:w         Save
:q         Quit
:wq        Save and quit
:q!        Quit without saving
/word      Search forward (n for next)
dd         Delete current line