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Get line1 and line4 in a repeat pattern file

 
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Top Forums UNIX for Dummies Questions & Answers Get line1 and line4 in a repeat pattern file
# 1  
Old 10-25-2006
Data Get line1 and line4 in a repeat pattern file
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!
# 2  
Old 10-25-2006
nawk -f bobo.awk myFile.txt

bobo.awk:
Code:
BEGIN {
  FS=RS=""
}
{
  print $1 ORS $4 ORS $NF ORS
}

# 3  
Old 10-25-2006
thanks I will try!
# 4  
Old 10-25-2006
Code:
sed -n "/./{p;n;n;n;p;n;p;n;p;}" file

 
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