Emacs is also your hexeditor

 Emacs is an extensible, customizable text editor. And one of a great choice for hackers. It is not just a text editor but a hackers tool too.
Emacs can be used as hexeditor. There's a small trick to turn emacs into hexeditor. You just need to press alt+x. Then at the bottom of the editor you will see M-x and a cursor blinking. Now you just type hex-mode and hit ENTER. You emacs is now a hexeditor.
Viola !!! and now you can edit you binary files in hex mode. 


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