hkatz@verbier[1416 20:07:13]: for i in distributed_exchange_truffle_class_3 truffle_eth_class2; do   (cd $i; find . -name \*sol -exec grep -Hin \ attack {} \;  ; echo "leaving $i"); done
leaving distributed_exchange_truffle_class_3
leaving truffle_eth_class2
hkatz@verbier[1417 20:07:23]: ls
data/  data2/  distributed_exchange_truffle_class_3/  genesis.json  geth-data2.txt  geth.log  nohup.out  truffle_eth_class2/