On 2018 Feb 17 04:41:20, you wrote to Digital Man:

 >> kk4qbn@kk4qbn:~$ unset HELLO
 >>> kk4qbn@kk4qbn:~$ source hi.sh
 >>> bash: export: `HELLO-Hi!': not a valid identifier

 DM>> You did something wrong. :-)

 KQ> but what? the hi.sh is EXACTLY what you typed and I followed step by step.

that's easy... you used a '-' instead of a '='... that's what you did wrong...

export HELLO=Hi!          <- good
export HELLO-Hi!          <- bad

)\/(ark

Always Mount a Scratch Monkey
Do you manage your own servers? If you are not running an IDS/IPS yer doin' it
wrong...
... Army Axiom: Any order that can be misunderstood has been.
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