mod append;
mod calc;
mod cd;
mod compact;
mod cp;
mod default;
mod edit;
mod enter;
mod first;
mod format;
mod get;
mod group_by;
mod histogram;
mod insert;
mod last;
mod lines;
mod ls;
mod mkdir;
mod mv;
mod open;
mod parse;
mod pick;
mod prepend;
mod range;
mod rename;
mod reverse;
mod rm;
mod save;
mod sort_by;
mod split_by;
mod split_column;
mod touch;
mod uniq;
mod where_;
mod wrap;