This is a tiny line editor which can easiely ported to edit config files on a MCU.
Commands:
lined [file] d23 - deletes line 23 in [file]
lined [file] i2 Hello World! - inserts "Hello World" on line 2 in [file]
lined [file] a Hello World again - appends "Hello World again" to [file], if [file] does not exist it is created
lined [file] r2 Goodbye World! - replaces line 2 in [file] with "Goodbye World!"
lined [file] p - prints the content of [file]