Use Variable Date in Sed Command

Question

I want to use sed command as below:

$ sed -n '/MONTH_TODAY DATE_YEST/,/MONTH_TODAY DATE_TODAY/p' \
   /home/crmiib/TESTUSERLOG/XYZ/user.log

I can print logs using:

$ sed -n '/Jul 27/,/Jul 28/p' /home/crmiib/TESTUSERLOG/XYZ/user.log

But I want to view logs using variables instead of hard coded dates?

Answer 1

Use double quotes so the shell evaluates the variables before sed runs:

DATE_YEST="Jul 27"
DATE_TODAY="Jul 28"
sed -n "/$DATE_YEST/,/$DATE_TODAY/p" /home/crmiib/TESTUSERLOG/XYZ/user.log