sed n 2,4p example

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sed -n 2,4p example
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sed n /aAggararwal/p example
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Records in a file in following format

• Doe
• JOE
• 897-9090
• 40 North Bend,
• Cincinnati,
• Ohio
• 45212
• Smith
• marry
• 345 New Road,
• Old City
• New York
• 345689
• Doe,
• joe
• 40 North Bend
• Cincinnati

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Hints for hw2

• Transform record file into canonical form
• JOE DOE40 NORTH BENDCINCINNATIOHIO45212
• MARY SMITH345 NEW ROADOLD CITYNEW YORK
  345689
• etc.
• the file has one line per address with fields
  separated by a colon
• Addresses are cleaned-up, converted to upper
  case, sorted with duplicates removed

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Use filters sed, tr and sort to transform record
file. Below are some of the steps involved.

• sed 's//_at_/' myaddr \
• tr '\012_at_' '\012' \
• sed 's///s///' \
• sort u t 0 3
• 
  
  
  
  
  
  
  
  
  
  
  
  
  
  

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Use filter awk to convert transformed canonical
file into desired address labels
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Passing Arguments to Shell Programs

• To reference arguments from inside a shell
  program use
• i
• where i is an integer from 0 to 9.
• The name of the script is represent by 0.
• 1, 2, , 9 represent
• argument 1, argument 2, , argument 9.

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Number of arguments

• The number of arguments is represented by argv
• argvi represents the ith argument, i.e.,
• argvi is the same as i, i 1, , 9.