# nnn > Interactive terminal file manager and disk usage analyzer. > More information: . - Open the current directory (or specify one as the first argument): `nnn` - Start in detailed mode: `nnn -d` - Show hidden files: `nnn -H` - Open an existing bookmark (defined in the `NNN_BMS` environment variable): `nnn -b {{bookmark_name}}` - Sort files on [a]pparent disk usage / [d]isk usage / [e]xtension / [r]everse / [s]ize / [t]ime / [v]ersion: `nnn -T {{a|d|e|r|s|t|v}}`