UNIX for Dummies Questions & Answers

Hi Help,
I have a file which looks like

Code:

123 44 55
344 55 77
600 88 99
123 44 56
342 45 65
600 76 88

I need to insert a line 900 87 65 after everytime it finds the the line with $1=600
that means o/p should be like

Code:

123 44 55
344 55 77
600 88 99
900 87 65

and so ...
please help..
Thanks a lot in advance

Code:

awk '$1==600{$0=$0 RS "900 87 65"}1' file

Same thing, little bit different..

Code:

awk '1; $1==600{print s}' s="900 87 65" file

-------

Simple sed for first request:

Code:

sed '/^600 /a\
900 87 65'

Regards,
Alister

Code:

3343 2256 7687 123 44 55
3456 4786 9345 344 55 77
4231 2671 7651 600 88 99
2345 4567 4567 123 44 56
9876 6547 3452 342 45 65
2341 4564 4356 600 76 88

If the line with $4=600 then insert a line with

Code:

4231 2671 7651 900 88 99

it is exact copy of the previous line but the $4 $5 $6 changes

thanks in advance....so sorry for the last submit...This CODE always confuse me…
thanks

Moderator's Comments:

CODE and ICODE tags are easy. Hit the CODE or ICODE button in the tool bar and then type your text between the tags hitting the button created. Or enter your text, highlight that text, and hit the CODE or ICODE button to surround the selected text with the appropriate tags. You seem to be hitting the button and then positioning the cursor after the closing tag before entering the text that should be tagged.

Note that $1==600 in the awk suggestions is a numerical comparison. This can match strings consisting of characters other than just a six followed by a zero followed by a zero. This may or may not be an issue.

Conversely, my sed approach strictly matches the three character string "600". Again, without knowing what your data means and how it's supposed to be interpreted, this may or may not be correct.

Regards,
Alister