[Linux 文章收集] vi Find And Replace Text Command

Source From Here 

Question
How do I find and replace (substitute) test using vi or vim text editor under UNIX / Linux / BSD or Apple OS X operating systems?

How-To
Both vi and vim text editor comes with substitute command for finding and replacing text.

Syntax
The syntax is as follows:

:%s/WORD-To-Find-HERE/Replace-Word-Here/g

OR

:%s/FindMe/ReplaceME/g

Examples
The substitute command can be used as per your requirements.

Task: VI / Vim Basic Find and Replace
To find each occurrence of ‘UNIX’, and replace it with ‘Linux’, enter (press ESC, type : and following command):

:%s/UNIX/Linux/g

 

Task: Find and Replace with Confirmation
Find a word called ‘UNIX’ and replace with ‘Linux’, but ask for confirmation first, enter:

:%s/UNIX/Linux/gc

Task: Find and Replace Whole Word Only
Find whole words exactly matching ‘UNIX’ to ‘Linux’; and ask for confirmation too:

:%s/\/Linux/gc

Task: Case Insensitive Find and Replace
Find ‘UNIX’ (match UNIX, unix, UnIx, Unix and so on) and replace with ‘Linux’:

:%s/unix/Linux/gi

Same command with confirmation:

:%s/unix/Linux/gic

How Do I Replace In the Current Line Only?
Find ‘UNIX’ and replace with ‘Linux’ in the current line only (note % is removed from substitute command):

:s/UNIX/Linux/g

How Do I Replace All Lines Between line 100 and line 250?

:{START-n},{END-n}s/word1/word2/g

Find ‘UNIX’ and replace with ‘Linux’ all lines between line 100 and line 250, enter:

:100,200s/UNIX/Linux/g

OR

:100,200s/UNIX/Linux/gc