assim:
cat huali-access.log* > merged-huali-access.log
ou para ter certeza de que é cronologicamente em ordem:
echo -n "" > merged-huali-access.log # creating new file and making sure its empty
for i in {1..52}
do
cat huali-access.log.${i} >> merged-huali-access.log
done
cat huali-access.log >> merged-huali-access.log