How do I join all selected lines into one line?
J (in visual mode)
In visual mode, pressing J joins all selected lines into a single line with spaces between them.
Search Vim Tricks
Searching...How do I replace all characters in a visual block with one character?
<C-v>selection r{char}
In visual block mode, pressing r followed by a character replaces every character in the selected rectangle with that character.
How do I select text character by character in Vim?
v
The v command enters character-wise visual mode, letting you select text one character at a time.
How do I append text at the end of multiple lines using visual block?
<C-v>jj$A
Combining visual block mode with $ and A lets you append text at the end of multiple lines, even when the lines have different lengths.
How do I change text in a visual block selection?
<C-v>selection c
In visual block mode, pressing c changes (replaces) all the text in the selected rectangle.
How do I add line numbers to multiple lines using visual block?
<C-v>jjI1. <Esc>
Visual block insert can add numbered prefixes to lines.
How do I copy from the cursor to the end of the line?
y$
The y$ command yanks (copies) text from the cursor position to the end of the line.
How do I restore a file to its state at a specific time?
:earlier 10m
The :earlier command restores the buffer to its state at a specific time in the past.
How do I sort lines alphabetically in Vim?
:sort
The :sort command sorts lines in the current buffer or a specified range alphabetically.
How do I swap two adjacent lines?
ddp
The ddp sequence swaps the current line with the line below it.
How do I remove trailing whitespace from all lines?
:%s/\s\+$//
The :%s/\s\+$// command removes trailing whitespace (spaces and tabs) from every line in the file.
How do I move a line to a specific line number?
:m {line-number}
The :m (move) command moves the current line to after the specified line number.
How do I increment a number under the cursor?
<C-a>
The command increments the number under or after the cursor by 1.
How do I delete the character before the cursor?
X
The X command deletes the character to the left of the cursor (before it).
How do I delete an entire paragraph?
dip
The dip command deletes the inner paragraph — all contiguous non-blank lines surrounding the cursor.
How do I copy a line to another location without yanking?
:t {line-number}
The :t (copy/transfer) command duplicates the current line and places it after the specified line number.
How do I decrement a number under the cursor?
<C-x>
The command decrements the number under or after the cursor by 1.
How do I change from the cursor to the end of the word?
ce
The ce command changes from the cursor position to the end of the current word.
How do I auto-indent the current line?
==
The == command auto-indents the current line based on the surrounding context.
How do I replace the contents of the entire current line?
cc
The cc command deletes the entire content of the current line (preserving indentation) and enters insert mode.