Why do we use sed command in UNIX?
[1] for replacing any text with another text
[2] for deleting file
[3] for creating directory
[4] None of above

• sed is basically used to edit something or replace one string to another inside a file.
  
  Syntax-sed [options] '{command}' [filename]
  
  example- let suppose a file1 in which we need to replace all strings of type cv to11
  
  so we'll write as- sed 's/cv/11' file1
  
  hence option [1] is correct.
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• 1 is the answer
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• for replacing text with another text.
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