More Zonkyness

Tag: Home

  • Why Does Tilde (~) Mean Home In Linux?

    If you use the Unix or Linux command-line, you may very well wonder about the origins of some of the “special” characters. One of those is tilde (~) which is expanded by the shell into “home” :-

    ✓ mike@Michelin» echo $HOME                        
/home/mike
✓ mike@Michelin» echo ~
/home/mike
✓ mike@Michelin» echo ~root
/root

    This doesn’t of course work in general; just in the shell.

    But where did this usage originate?

    As it turns out, it was the markings on the keyboard of the ADM3A terminal :-

    If you used Unix in the late 1970s/1980s, you may very well have used the ADM3A terminal and it seems that those who added the tilde feature to the Unix shell were amongst the users.