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Bash has some ability to handle hex. I don't know that it can convert a
string into hex though. If wpa_passphrase gets included it may be
possible for the installation script to strip the wpa_psk line out and
turn the psk value into hex and replace it in the /etc/network/interfaces
file it creates for wifi users. I can understand not wanting to leave an
/etc/network/interfaces file on a newly installed system without a secured
passphrase though.
