I want to modify a line if a specific keyword is found in a line.
CS_CODE, SM_NUM, PORT_NUM, DEV_PORT_NUM, DIRNUM, MAIN_DIRNUM, BILL_NO, ADR_NAME
In above line, if 'PORT_NUM' is present then 'BILL_NO' should be replaced with 'NA'. Only the keyword present in the line should be replaced.
I am using below approach:
while IFS=$'\n' read -r line do if [[ $line == *"$string"* ]]; then < sed command to replace only keyword > fi done < "$file"
How can I achieve this?
Note: '-i' extension does not work in my sed version.