What does Ctrl+V do in terminal tab?

[ghost]

Yes, I know that Ctrl+V will not work. I have used other terminal emulators, but I want to know what happens if I accidentally press it.

I was editing a file with nano and accidentally pressed Ctrl+V. It wasn’t obvious what it did. The cursor moved somewhere near the top of the file, but I couldn’t notice any other side effects. Nothing was obvious to my poor eyesight. I ended up canceling the edit without saving and had to redo the editing to be sure nothing went wrong.

[SpartanJ]

I don't want to sound rude but why don't you Google it or ask an LLM? It's really something that takes 10 seconds to answer.

2 seconds answer from Grok:
In the standard GNU nano text editor (the default on most Linux systems), pressing Ctrl+V simply scrolls the view forward by one page (equivalent to Page Down). It moves the cursor down accordingly, which matches what you described—the cursor jumping toward the top of the visible screen area if you were positioned lower in the file.

It does not paste anything from the clipboard, insert text, or modify the file content in any way. No text is added, deleted, or altered. The only effect is navigation/scrolling.

This is why you didn't notice any obvious changes beyond the cursor movement. Your file was completely safe—nothing went wrong, and canceling without saving was unnecessary (though it's always good to be cautious).

Note that in some terminal emulators, plain Ctrl+V might trigger a paste from the system clipboard (bypassing nano's own shortcuts), which could insert unintended text. But you mentioned knowing that doesn't work in your setup, so that's not what happened here.

For reference:

• Ctrl+Y scrolls up one page (Page Up).
• These shortcuts are listed at the bottom of the nano screen (as ^Y and ^V) or in the help (Ctrl+G).

If you're using a very recent version of nano with the --modernbindings option enabled (rare by default), Ctrl+V would instead paste—but that's not the standard behavior.

[ghost]

I don't want to sound rude but why don't you Google it or ask an LLM? It's really something that takes 10 seconds to answer.

Because I think it's something of the terminal emulator, not specific to nano.

[SpartanJ]

I understand, yeah, no, applications control what they do for each shortcut, it's essentially the same as in a GUI application, but the exception that some specific shortcuts are implemented by the terminal emulator. These are all from the terminal emulator side:

static TerminalShortcut shortcuts[] = {
	{ KEY_INSERT, KEYMOD_SHIFT, TerminalShortcutAction::PASTE, 0, 0 },
	{ KEY_V, KEYMOD_SHIFT | KEYMOD_CTRL, TerminalShortcutAction::PASTE, 0, 0 },
	{ KEY_C, KEYMOD_SHIFT | KEYMOD_CTRL, TerminalShortcutAction::COPY, 0, 0 },
	{ KEY_PAGEUP, KEYMOD_SHIFT, TerminalShortcutAction::SCROLLUP_SCREEN, 0, 0, -1 },
	{ KEY_PAGEDOWN, KEYMOD_SHIFT, TerminalShortcutAction::SCROLLDOWN_SCREEN, 0, 0, -1 },
	{ KEY_UP, KEYMOD_SHIFT, TerminalShortcutAction::SCROLLUP_ROW, 0, 0, -1 },
	{ KEY_DOWN, KEYMOD_SHIFT, TerminalShortcutAction::SCROLLDOWN_ROW, 0, 0, -1 },
	{ KEY_HOME, KEYMOD_SHIFT, TerminalShortcutAction::SCROLLUP_HISTORY, 0, 0, -1 },
	{ KEY_END, KEYMOD_SHIFT, TerminalShortcutAction::SCROLLDOWN_HISTORY, 0, 0, -1 },
};

static TerminalMouseShortcut mouseShortcuts[] = {
	{ EE_BUTTON_WUMASK, KEYMOD_SHIFT, TerminalShortcutAction::SCROLLUP_SCREEN, 0, 0, -1 },
	{ EE_BUTTON_WDMASK, KEYMOD_SHIFT, TerminalShortcutAction::SCROLLDOWN_SCREEN, 0, 0, -1 },
	{ EE_BUTTON_WUMASK, 0, TerminalShortcutAction::SCROLLUP_ROW, 0, 0, -1 },
	{ EE_BUTTON_WDMASK, 0, TerminalShortcutAction::SCROLLDOWN_ROW, 0, 0, -1 },
	{ EE_BUTTON_WUMASK, KEYMOD_CTRL, TerminalShortcutAction::FONTSIZE_GROW, 0, 0, 0 },
	{ EE_BUTTON_WDMASK, KEYMOD_CTRL, TerminalShortcutAction::FONTSIZE_SHRINK, 0, 0, 0 } };

These also will behave differently depending if the terminal is in alt screen mode or not.