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Command Line for vi in MAC
 
While in command mode (case sensitive)
 
move the cursor with arrow keys; if there aren't any arrow keys, use j,k,h,l
 
i - change to insert mode (before cursor)
a - change to insert mode (after cursor)
A - change to insert mode (at end of line)
r - replace one character
R - overwrite text
x - delete one character
dd - delete one line
yy - yank line (copy)
p - paste deleted or yanked text after cursor
P - paste deleted or yanked text before cursor
G - go to end of the file
1G - go to top of the file
J - merge next line with this one
/ - search, follow / with text to find
 
:wq - write file and quit
:q! - quit without saving
%s/old/new/g - substitute; replace "old" with "new" on all lines
:g/pattern/d - delete all lines that match the pattern
 
While in insert mode
ESC - change to command mode
any text typed is entered at the cursor
 
Typical vi session
Type "vi file.txt" at command prompt
Move cursor to where new text will be added
Type "i" to change to insert mode
Type new text
Type ESC to go back to command mode
type ":wq" and ENTER to write the file and quit
 
 
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