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How to add a return after a special pattern?

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# 1  
Old 10-12-2011
Data How to add a return after a special pattern?
Hello
I'm new to Solaris

I have a file have things like these

Code:
PATTERN12345678
PATTERN12345678PATTERN87654321
PATTERN12345678 PATTERN87654321

i hope i could change to this format
Code:
PATTERN12345678
PATTERN12345678
PATTERN87654321
PATTERN12345678
PATTERN87654321

I've tried grep sed and tr. but failed. could someone give me a example?
# 2  
Old 10-12-2011
Code:
$ sed 's,PATTERN,|PATTERN,2' infile | tr '|' '\n'
PATTERN12345678
PATTERN12345678
PATTERN87654321
PATTERN12345678
PATTERN87654321
$

# 3  
Old 10-12-2011
Code:
sed '/PATTERN12345678[^$]/{s/\(PATTERN12345678[ ]*\)\(.*\)/\1\n\2/g}' input_file

--ahamed
Last edited by ahamed101; 10-12-2011 at 02:58 AM..
# 4  
Old 10-12-2011
Code:
awk -F"PATTERN" '{for(i=1;i<=NF;i++){printf $i!=""?FS $i"\n":x}}' filename

If running on SunOS or Solaris platform, use "nawk" or "/usr/xpg4/bin/awk" instead of "awk"
# 5  
Old 10-15-2011
Thanks you
It works!
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