Bash, using variable in sed

fur · 11-07-2005, 06:38 PM

This is the command I'm trying to use..

sed -n '1p' filename

What I am trying to do is have "1" be a variable that will have a counter on it that gets incremented in a while loop.. The part I'm trying to figure out is how to use a variable inside of sed.

I tried this, and a few variations, but its not working..

VARIABLE="1"

sed -n '/$VARIABLE/p' filename

Thanks

jailbait · 11-07-2005, 07:44 PM

my guess

VARIABLE=1

sed -n "${VARIABLE}p" filename

-------------------
Steve Stites

fur · 11-07-2005, 07:52 PM

That was easy enough

Thanks

eddiebaby1023 · 11-12-2005, 07:41 AM

Invest some time learning the difference between single and double quotes in shells. It'll repay you in spades. For starters:

Code:

VAR="aa            bb                  cc"
echo $VAR
echo "$VAR"
echo '$VAR'