Looking to reject the GUI life altogether and restrict yourself to the command line like a real Unix geek? Great! But as soon as you miss the OOo spellchecker, don't fret: most Linux systems come with the look command built-in, which is a command-line spellchecker. To get started, type look followed by part of a word:
look separ
should show you matches like "separate", "separately", and so on, whereas entering:
look seper
will show nothing, because "seperate" is a mis-spelling.