title: Unix commands to remove a particular line form all files
body: <p>is there any command or a way in unix to remove particular line from all the files.</p>
  
  <p>example :
  I have some 300 .c files where the file header has author name. and I need to remove this line from all the files. I am looking to do this in oneshot.</p>
  
  <p>if there is any command or a way please help me on this.</p>
  
  <p>Thanks..</p>