sed — Edit text in a scriptable manner. See also: `awk`, `ed`. More information: <https://keith.github.io/

Replace all `apple` (basic `regex`) occurrences with `mango` (basic `regex`) in all input lines and print the result to `stdout`

{{command}} | sed 's/apple/mango/g'

Execute a specific script [f]ile and print the result to `stdout`

{{command}} | sed -f {{path/to/script_file.sed}}

Replace all `apple` (extended `regex`) occurrences with `APPLE` (extended `regex`) in all input lines and print the result to `stdout`

{{command}} | sed -E 's/(apple)/\U\1/g'

Print just a first line to `stdout`

{{command}} | sed -n '1p'

Replace all `apple` (basic `regex`) occurrences with `mango` (basic `regex`) in a `file` and save a backup of the original to `file.bak`

sed -i bak 's/apple/mango/g' {{path/to/file}}