How to convert \uXXXX unicode to UTF-8 using console tools in *nix

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Might be a bit ugly, but echo -e should do it:

echo -en "$(curl $URL)"

-e interprets escapes, -n suppresses the newline echo would normally add.

Note: The \u escape works in the bash builtin echo, but not /usr/bin/echo.

As pointed out in the comments, this is bash 4.2+, and 4.2.x have a bug handling 0x00ff/17 values (0x80-0xff).

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