What's up?

[Basie]

I am trying to register on the Chakra forum and the human question What is the output of: echo $(date -u +%W)$(uname) | sha256sum | sed 's/\W//g' ? Not sure what the answer is. What are they looking for?

[oz]

What is the output of: echo $(date -u +%W)$(uname) | sha256sum | sed 's/\W//g' ? Not sure what the answer is. What are they looking for?

They are looking for the output of that command when run in a terminal or console.

[Basie]

They are looking for the output of that command when run in a terminal or console.

Okay, I copied and pasted it in a terminal and got a long string of letters and numbers. So I copied and pasted it into the Human Question Field and still no help.
They still claim it's an incorrect response. Any other suggestions? Thanks.

[reed9]

I just registered and it works ok for me. Maybe you copied an extra space or something in there?

[Basie]

From another forum a post gave me a string of numbers and letters and said it was a
check sum which I hadn't thought of. So, I copied and pasted that and it worked fine.
It was totally different from the string I created from a terminal on my system.
I did it a few times so I know I copied and pasted that string without any glitches. Oh, well another binary mystery.

[reed9]

It is a checksum, that's the sha256sum part.

The fist part generates a number based on the week of the year

# date -u +%W
18

Then adds the output of uname

# echo $(date -u +%W)$(uname)
18Linux

Then gets the sha256sum of that, a 256 bit checksum.

# echo $(date -u +%W)$(uname) | sha256sum
9a93b71d5b2841e649195bc81f8e38600860a040bc368cdbd0cde346b73248a1  -

Then gets rid of the extraneous character at the end with sed.

# echo $(date -u +%W)$(uname) | sha256sum | sed 's/\W//g'
9a93b71d5b2841e649195bc81f8e38600860a040bc368cdbd0cde346b73248a1

[Basie]

Thanks for that reply. I traced my steps and tonight I got that exact same string the checksum that works. So, it must have been an error on my part when copying & pasting in the terminal yesterday.