Get line1 and line4 in a repeat pattern file

bobo · #1 (**permalink**) 10-25-2006

I have a datafile contain hundreds of lines:

line1
1
2
line4
==================

line1
4
2
line4
==================

line1
3
1
line4
===================

.......

I want data to be:

line1
line4
=================

line1
line4
=================

line1
line4

How can I do this? Please help!

vgersh99 · #2 (**permalink**) 10-25-2006

nawk -f bobo.awk myFile.txt

bobo.awk:

Code:

BEGIN {
  FS=RS=""
}
{
  print $1 ORS $4 ORS $NF ORS
}

bobo · #3 (**permalink**) 10-25-2006

thanks I will try!

anbu23 · #4 (**permalink**) 10-25-2006

Code:

sed -n "/./{p;n;n;n;p;n;p;n;p;}" file

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