Q: How do I replace text in file using sed?
A: The below replaces text string "test" with the new string "test-new" in file called "text.txt".
# sed 's/test/test-new/g' text.txt
See also Replace text in file using perl.
A: The below replaces text string "test" with the new string "test-new" in file called "text.txt".
# sed 's/test/test-new/g' text.txt
See also Replace text in file using perl.