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What to do if your terminal goes into graphics mode
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If you send a binary file to your terminal, it may switch to the
graphics character set.  In that character set, lower-case letters
appear as graphics and line drawing characters.

What you type into the keyboard isn't affected; only the display on the
screen is scrambled.  You can still type commands to Unix.

To get back to normal, non-graphic display mode on Linux, type:

     setterm -reset

(This command will not display properly; but, you can type it anyway.)

The setterm command does not exist on ACADAIX.  You can log out of
ACADAIX, reset your Linux console using setterm, and then log back in.
Or, you might try executing the ACADAIX shell script /thome/alleni/reset
to see if that sets your character set back to normal.