Please post your formatted code (use the “</>” button or consult this:
Going forward, if you have a screenshot of the task (including your input & the error message) that would be helpful too.
That said,
Looking at the text you pasted,
mv airdry.txt …/ceramic/
you used three periods ".../ceramic " instead of two: "../ ceramic/"
one ‘.’ is the current working dir, two periods is the parent directory.
Should be:
mv airdry.txt ../ceramic/
cd ../ceramic
$ ls
airdry.txt earthenware.txt stoneware.txt
For more Unix commands: