- 1). Log in to the computer as a regular user.
- 2). Start a command-line prompt. The specific way of performing this step depends on the operating system. For instance, in Ubuntu, launch a command shell by clicking on the "Terminal" icon on the graphical desktop.
- 3). Launch the editor and configure it to operate in hex mode. For example, on Ubuntu, type the "vim -b" command into the shell and press "Enter." Press "Escape" and type the ":setlocal wrap display=uhex" command.
Press "Enter." - 4). Load the file you want to edit into the hex editor. For example, on Ubuntu, press "Escape" and type ":r !xxd myFile.hex," replacing "myFile.hex" by the name of the hex file. Press "Enter." The hex editor displays the contents of the file.
- 5). Alter the contents of the file as needed by modifying the hexadecimal numbers in the columns on the left portion of the screen.
- 6). Save the modifications to the file and exit the hex editor. For example, on Ubuntu, press "Escape," then type ":wq" and press "Enter."