sed to read and write to very same file

435 Gavea · #1 (**permalink**) 06-29-2006

This is likely to be a dumb one.

How can I use sed to substitute string occurances having it read from an input file and write to this very same file ?

I have a file with lots of occurances of '2006', I want to change it to '2007', but I'd like these changes to be saved on the input file.

How do I achieve this ?

Thanks in advance,
Abrahao, Brazil.

jim mcnamara · #2 (**permalink**) 06-29-2006

Code:

sed 's'/2006/2007/g' oldfile > tmpfile ; mv tmpfile oldfile

435 Gavea · #3 (**permalink**) 06-29-2006

yeah...
I hoped it would be possible in a single command, but, anyway, thanks !

Hitori · #4 (**permalink**) 06-29-2006

If you want exactly 1 command try perl:

perl -pi -e "s/2006/2007/g" filename

LivinFree · #5 (**permalink**) 06-29-2006

If you're using newer versions of GNU sed:

Code:

sed -i 's/2006/2007/g' file

matrixmadhan · #6 (**permalink**) 06-30-2006

Quote:

Originally Posted by jim mcnamara

Code:

sed 's'/2006/2007/g' oldfile > tmpfile ; mv tmpfile oldfile

don't take it seriously jim,
there's a typo

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