Shell script to append text to each file?

Question

I have a folder full of text files. I need to append the same block of text to each of them (and of course overwrite the original file).

I was wondering what the co

Answer 1

Variant of kurumi's answer:

sed -i.bak "\$aTEXTTOINSERT" *.txt

For more details, see SED: insert something to the last line?