How to delete a line containing certain text through the console?

Question

linux

I have a simple BASH that creates hosts for me.

echo "127.0.0.1 $newsite www.$newsite" >> /etc/hosts

Now I'm trying to write a script to delete this line.
sed -i '/$delsite/d' /etc/hosts
Why doesn't it listen to me? Where is the joint?

Answer 1

sed -i "/$delsite/d" /etc/hosts
but I don't advise you to do this - something will get into the variable and the file will get corrupted completely
make a file with a list of domains and a script to turn the list into a hosts file
to check this type of command, useecho sed -i "/$delsite/d" /etc/hosts