VI/VIM

Line Numbers 
 vim can display line numbers using the below command: 
 :set number 
 Skip to specific line number 
 To skip to line 255: 
 :255 
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 Searching strings 
 To search for a string in a text file, the / option can be used. In the below example, we're searching for the word test 
 :/test 
 To skip to the next found instance of the word, press the n key. 
 Search string on a range of lines 
 In this example, I'm searching for the string 'test' on lines 1-100: 
 :1,100/test 
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 Deleting Lines 
 Vim can delete lines using a number of methods 
 Remove X amount of lines. 
  The below command would remove 5 lines from (and including) the current line: 
 :5d 
 Remove a range of lines: 
 1,5d 
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 Search and replace 
 Search and replace a word through the whole file: 
 :%s/wordtosearch/wordtoreplacewith 
 Search and replace on specific lines 
 We can couple the search and replace function of vim with the line number range tool. The below would find any instances of the word 'test' within the line range of 1-100, and then replace all instances of the word with 'testing': 
 :1,100s/test/testing 
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 Copy & pastse 
 Copy the currently selected line 
 :yy 
 Copy a range of lines 
 The below would copy lines 1-1000 
 :1,1000y 
 Paste the line: 
 p 
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 Saving & exiting  
 save and quit: 
 :wq 
 don't save and quit 
 :q! 
 Save as new file 
 :w newfilename 
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