GNU nano for Linux is a free editor which aims to replace Pico, the default editor included in the non-free Pine package. GNU nano for Linux features Autoconf support, case sensitive search function, interactive search and replace, 2/3 to 1/8 size of Pico binary, slang and ncurses support, autoindent ability, displayed tab width option, regular expression search and replace, toggles for cmdline flags via Meta keys, and customizable key bindings, tab completion when reading or writing files, undo or redo support, and pager support.