<Jafet> (echo \'#!/bin/sh\'; echo "cd /var/irclogs/_esoteric; cat \\$(ls ????-??-??.txt | tail -1) | sed \'s/[^>]*> //\' | grep \'^\\`\' | tail -1 #Best cheating quine ever?") > bin/quine2 && quine2

#!/bin/sh
cd /var/irclogs/_esoteric
if [ "$1" ]; then
    grep -P -i -- "$1" ????-??-??.txt | shuf -n 1
else
    file=$(shuf -en 1 ????-??-??.txt)
    echo "$file:$(shuf -n 1 $file)"
fi