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Full Discussion: How to convert three blank lines to one
Top Forums Shell Programming and Scripting How to convert three blank lines to one Post 302392798 by Scrutinizer on Friday 5th of February 2010 12:57:50 PM
Old 02-05-2010
Try this:
Code:
while IFS= read -r line
do
   if [ "$line" = "" ]; then   
     read line; read line
   fi
   echo "$line"
done < infile

 

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LEARN ABOUT REDHAT

line

line(1)                                                            User Commands                                                           line(1)

NAME

       line - read one line

SYNOPSIS

       line

DESCRIPTION

       The  line utility copies one line (up to and including a new-line) from the standard input and writes it on the standard output. It returns
       an exit status of 1 on EOF and always prints at least a new-line. It is often used within shell files to read from the user's terminal.

EXIT STATUS

       Exit status is:

       0        Successful completion

       >0       End-of-file on input.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       sh(1), read(2), attributes(5)

SunOS 5.10                                                          1 Feb 1995                                                             line(1)
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