Shell Programming and Scripting

Hi,

Can anyone let me know the sed command usage

requirement:

Code:

sed 's/standard/standard_and/' <new.txt>new.txt

here it needs to search for the pattern "standard" in the file new.txt and it should replace as "standard_and" in the same file new.txt
Note: new.txt is having a separator '|'

Can anyone say me the correct command here

Thank you!

When u use the same file name, then the resulting file will be a zero byte.

Try sed 's/standard/standard_and/g' new.txt > new1.txt

It is never advisable to write your code output directly to your file.

better way is

Code:

sed 's/standard/standard_and/' <new.txt > temp_file
mv temp_file new.txt

Or use -i option from sed.

Regards,

pamu

Hi,

Thanks for the update!

But i need to modify the columnname from "standard" to "standardand" in the flat file before it is FTPied to a particular location.

a filename with directory location is stored in a unix variable, i need to modify that before ftping
example

Code:

$direcorylocation/$filename

so i need to do

Code:

sed 's/standard/standardand/' < $direcorylocation/$filename

- iam not sure what to do here

This is an automated process and i cannot modify in the middle

Code:

sed 's/standard/standardand/' < $direcorylocation/$filename > tempfile

Then run ftp or whatever on tempfile

Hi,

I cannot run ftp on the tempfile, i can run only on $direcorylocation/$filename - this value is predefined.

add a command after the replacement,

Code:

mv tempfile $direcorylocation/$filename