Using a Caesar Cipher shifted

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$$encode the following message:attackatdawnThis can be done by hand or with the following command in a Kali terminal window that takes the hrst string and translates the letter in the second string into the letter in the same position of the third string.If you don't want to type out all those letters, use a short cut that the tr command gives usecho 'attackatdawn' $1$ tr $\text{'}$a$-2\text{'}\text{'}9-28-11$