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I would like to know how a "d3fg" command works in vi.

I have done some research on Google and found that d is delete and fg means foreground. Suppose, if we want to stop the session of vi and resume it afterwards, we can press Ctrl+z to come out of the vi session. Then type fg to go back to the same vi session.

Now I wanted to know how this d3fg works in vi editor.

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    The best way to find out what a single command in Vim does, is not google, but the help system. Simply type :h f to get help on the f command. – elyashiv Mar 1 '15 at 20:35
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    @elyashiv not very useful when one thinks of the command as fg. What does :he fg give you? – muru Mar 2 '15 at 11:04
  • @muru a lout of information - you find out there is no command fg (just -fg), so you conclude the command is f... – elyashiv Mar 2 '15 at 20:40
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In fact, fg is "foreground" in Bash, but not in Vi(m). d3fg means:

d - Delete until...
3 - Do the next motion 3 times
f - Go to the next occurrence of the next character pressed.
g - The character to go to.

Thus, d3fg will delete up to (including) the third letter g on the line after the cursor.

Thus the following text, with the cursor on the 0:

01g2g3g4g5g6

Becomes after d3fg:

4g5g6

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