use awk with input from a variable

Question

i need to fetch n+9th line from the occurance of a specific word which is store in variable i from a file LIST.txt

Below is the command

Used_pages=`awk '/${i}/{nr[NR+9]}; NR in nr'  LIST.txt`

it works when i do a test run on the file by replacing the variable $i with one of the values like

 awk '/APPLE/{nr[NR+9]}; NR in nr'  LIST.txt

Please help me figgure out how to use the same command with the variable.

Thanks

Does this help? Pass shell variable as pattern to awk – steeldriver Dec 05 '15 at 13:18 — steeldriver, Dec 05 '15 at 13:18

score 2 · Accepted Answer · answered Dec 05 '15 at 14:48

awk has the -v parameter for setting variables. To set the variable $i in awk, you would say awk -v i=$i and then within the awk statement, simply reference the variable as i rather than $i.

I haven't tested the following, but try this:

used_pages="$(awk -v i=$i '/i/{nr[NR+9]}; NR in nr' LIST.txt)"

use awk with input from a variable

1 Answers1