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Shell Programming and Scripting

How to replace the word?

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Top Forums Shell Programming and Scripting How to replace the word?
# 1  
Old 05-24-2012
MySQL How to replace the word?
Hi Everybody,

I am having a query like I want to change only first three patterns of the first line in a file.

ex: I like unix unix unix unix is very much.

after using the command it should be like

I like linux linux linux unix is very much.

Thanks,
Naga
# 2  
Old 05-24-2012
Hi


Code:
$ cat file
 I like unix unix unix unix is very much
$ awk '{j=0;for(i=1;i<=NF&&j<3;i++)if($i=="unix"){$i="linux";j++;}}1' file
I like linux linux linux unix is very much

Guru.
# 3  
Old 05-24-2012
Another approach:
Code:
sed -e 's/unix/linux/g' -e 's/linux/unix/4' file

# 4  
Old 05-24-2012
Using sed (longer but more foolproof than the previous one... Smilie)

Code:
echo "I like unix unix unix unix is very much."|sed 's/unix/linux/1
s/unix/linux/1
s/unix/linux/1'

Will also work for an input like

Code:
I like unix unix linux unix unix is very much.

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