read and change string

[Yarka]

Hi,

I would like to know how I can read a specific string and then the following strings of the same row change them by other strings.

For example:
If I have a file like:

aa 22 33
bb 33 23
bt 34 98
a4 99 100
aa 44 66
f6 90 09
...

I need to change all the strings 'aa' the following columns need to have the values 88 80, so the result would be:

aa 88 80
bb 33 23
bt 34 98
a4 99 100
aa 88 80
f6 90 09
...

How I could do it?

Thanks!

 

[stefanwagner]

sed 's/aa.*/aa 88 80/' file

Save the output to a new file:

sed 's/aa.*/aa 88 80/' file > new.file

change in place:

sed -i 's/aa.*/aa 88 80/' file

don't visit my homepage:

http://home.arcor.de/hirnstrom/minis/index.html

 

[Yarka]

Thanks!