Shell Programming and Scripting

Hi,

I am trying to replace a value in the file using sed. The input file looks like

input file format:

Code:

<FileName>DWM_00000000.xml</FileName>

I have to replace 00000000 with today's date with a field containing today's date.

For example,

Code:

file_date=`date +%Y%m%d`;

ouput file format:

Code:

<FileName>DWM_20110112.xml</FileName>

I am using command to get the result but it shows me the following output instead

Code:

<FileName>DWM_$file_date.xml</FileName>

.

Can someone please help me.

Thanks

Naveed

Moderator's Comments:

Please use code tags when posting data and code samples!

Hi.

It's because you are using single quotes:

Code:

sed ' .... '

instead of double quotes:

Code:

sed " ... "

The shell won't expand things in single quotes.

Code:

$ sed "s/00000000/$(date +%Y%m%d)/" file
input file format: <FileName>DWM_20110112.xml</FileName>

Thanks a lot. It really works.

Naveed