If you don't know what a quine is, consider yourself lucky
rhatto just asked me to approve a change in keygringer’s license from AGPLv3+ to GPLv3+ citing a discussion about a Berkeley DB’s switch to AGPLv3. For some reason, a reference to a quine caught my eye.
If you don’t know what a quine is, I suggest you remain ignorant. I won’t even provide the Wikipedia link.
A quick web search suggests that it’s quite possible to write one in bash. I hope to be productive again some day.