import re with open('/home/kboz/eve_haul/backend-go/cmd/eve_haul_go/main.go', 'r') as f: t = f.read() t = re.sub(r'log\.Println\("\nShutting down server gracefully\.\.\."\)', r'log.Println("Shutting down server gracefully...")', t) with open('/home/kboz/eve_haul/backend-go/cmd/eve_haul_go/main.go', 'w') as f: f.write(t)