Making Changes without opening file - Shell Programming and Scripting

irehman · #1 (**permalink**) 03-13-2006

Hello,

I'm new to scripting, I have a file test.dat. I want to make changes to it with out openning it.

Example: test.dat has rows, and I want to change value "LA" to "TX" without opening it or without writing it to another file.

Is it possible?

Thanks

zazzybob · #2 (**permalink**) 03-13-2006

perl -pi -e "s/LA/TX/g;" test.dat

Cheers
ZB

dhana_1979 · #3 (**permalink**) 03-13-2006

Try this one sed 's/LA/TX/g' filename > filename1

matrixmadhan · #4 (**permalink**) 03-13-2006

Quote:

Originally Posted by dhana_1979

Try this one sed 's/LA/TX/g' filename > filename1

request was not to write to another file,
your command redirects to filename1
in such a case you need to use the -i option available in GNU sed

vgersh99 · #5 (**permalink**) 03-14-2006

Code:

(echo 'g/LA/TX/g'; echo 'wq') | ex -s filename

futurelet · #6 (**permalink**) 03-14-2006

Code:

ruby -i -pe 'gsub(/LA/,"TX")' test.dat

GCTEII · #7 (**permalink**) 03-15-2006

Quote:

awk '{gsub("LA","TX"); print}' filename

I asked the same question last time ^O^. Its the easiest way to solve ur problem.

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