1*4882a593Smuzhiyunif [ ! -f .version ] 2*4882a593Smuzhiyunthen 3*4882a593Smuzhiyun echo 1 4*4882a593Smuzhiyunelse 5*4882a593Smuzhiyun expr 0`cat .version` + 1 6*4882a593Smuzhiyunfi 7