Change command name in ubuntu terminal

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http://askubuntu.com – I use the sublime text 2 text editor for developing in Ubuntu. When I want to open a file form the command line i need to type sublime-text-2 . I would like to be able to tab after sub to get that but there is sublime-text and subl or something as well that auto-complete. Is there a way to change or create an alias for the name sublime-text-2 and call it sub or just sublime or even something completely different like texta? (HowTos)