Using bash variables for range in sed

Question

sed -n '5,10 p' < /proc/cpuinfo 

prints 5-10 lines of the file /proc/cpuinfo

I want to use something like

start=5
end=10
sed -n '$start,$end p' < /proc/cpuinfo

so that I can change the values of start and end form a script.

Answer 1

You need to use double quotes for variable expansion:

start=5 end=10; sed -n "$start,$end p" < /proc/cpuinfo