[SOLVED] i want to pass a line number variable in sed

figure20012 · 08-31-2012, 11:55 AM

num=10
sed -n '$num p' test.txt

sed -n '10 p' test.txt works

however i am putting the sed command in a loop and the line number is not static
Can someone please help me how to achive this.

byannoni · 08-31-2012, 12:47 PM

Use double quotes:

Code:

sed -n "$num p" test.txt

figure20012 · 08-31-2012, 12:56 PM

Quote:

Originally Posted by byannoni

Use double quotes:

Code:

sed -n "$num p" test.txt

thnks a lot byannoni

David the H. · 08-31-2012, 06:19 PM

It looks like it's time for you to learn the difference between double and single quotes. Start here:

http://mywiki.wooledge.org/Quotes
http://wiki.bash-hackers.org/syntax/quoting