Sl: Sl (ls with enhancements) Sl: Sl: sl takes the most common use of Unix ls, to display the files in a Sl: directory compactly in multiple columns, and makes it substantially Sl: more useful. Sl: Sl: sl groups files by purpose so you can mentally organize many files Sl: quickly; for instance, it collects HTML and PHP files together, as Sl: opposed to leaving them mixed up with supporting images, CSS, and Sl: JavaScript. Sl: