delete line specified by variable wihin shel script with sed

lnchatterbox · 02-23-2004, 11:18 AM

Hi!

I am trying to delete a line from a file using sed.

This works:
sed '4d' inputfile
#deletes 4th line from inputfile

BUT: I have the line stored in a shell variable $line

This doesn't work:
sed '$(line)d' inputfile

Any ideas? I've already tried most combinations of brackets and ",' etc.
Thanx in advance!

homey · 02-23-2004, 12:00 PM

This seems to work ok.....
The variable is in double quotes "$line" and the command is in single quotes 'd'

Code:

#!/bin/bash

line="1,4"

cat file1.txt | sed -e "$line"'d' > file2.txt

lnchatterbox · 02-23-2004, 01:24 PM

Thanx alot! It works now!