Using vi as a hex editor

Source: http://www.kevssite.com/using-vi-as-a-hex-editor/
Written on April 21, 2009 by Kev
Sometimes I find it useful to switch to hex mode when editing a file in vi. The command for switching is not very obvious so thought I’d share…

So, open a file in vi as usual. To switch into hex mode hit escape and type:

:%!xxd

And when your done and want to exit from hex mode hit escape again and type:

:%!xxd -r

Okay, so this isn’t actaully switching to vi’s ‘hex mode’; vi doesn’t have one. What the above actually does is to stream vi’s buffer through the external program ‘xxd’.

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