Replace line in config file using bash script

Question

I have a line as follows in varnish config file.

VARNISH_STORAGE="file,${VARNISH_STORAGE_FILE},${VARNISH_STORAGE_SIZE}"

I need to replace the whole line above with

VARNISH_STORAGE="malloc,${VARNISH_STORAGE_SIZE}"

I need to write a shell script for this. How can I achieve this using sed or should I use something else?

Answer 1

sed 's/file,${VARNISH_STORAGE_FILE}/malloc/' filename