需要写一个shell,从数据库a文件中提取身份证号码,并计算出年龄、出生日...答:echo a|awk '{print(strftime("%Y",systime())-substr($0,7,4));printf("出生 于:%d\n",substr($0,7,8));if(substr($0,17,1)%2)print "男";else print "女"}'echo 21028319881202505x|awk '{ printf("出生于:%d\n",substr($0,7,8));if(substr($0,17,1)%2)print "男...