While using the command “sed” for find and replace, I wanted to know how one could find a constant and replace it with a variable inside the quotation syntax of sed?
I wanted to replace constant 3 with variable name “hourid”
Here is what I tried.
sed -i 's@3@hourid$@g' file_name.txt
I want to know how to provide a right syntax for replacing variable “hourid”
Your suggestions are greatly appreciated
Welcome @achandra81 to nixCraft forum.
You need to put syntax is double quote for shell expansion for variables. For example:
sed -i "s/find/replace/g" file
Say you need to find 3 and replace with the contents of variable named $foo:
sed -i "s/3/$foo/g" file
To replace constant 3 with variable name “hourid”:
sed -i "s/3/\$hourid/g" file
sed -i 's@3@\$hourid@g' file_name.txt
sed -i 's@3@$hourid@g' file_name.txt
Thank you Vivek for your quick response.
This site is very informative. I try to engage and help others.