Disable DEP/NX on Linux in Grub

disabledep.txt

Boot and interrupt the GRUB menu
Edit the boot configuration, changing the "linux" line by adding these two parameters to the end of the line:
    noexec=off noexec32=off
Then boot by pressing Ctrl+x.

After booting, you can check to see if DEP/NX is turned off by running:
    dmesg | grep NX

When DEP/NX is turned off you should see something similar to this output:

# dmesg | grep NX
[    0.000000] NX (Execute Disable) protection: disabled by kernel command line option

Linux kernel docs for reference on more: https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt