v_curr_rq=`date +%Y%m%d`
v_rq=`date -d "yesterday" +%Y%m%d`
v_lm=`date +%Y%m01`
v_lm_rq=`date -d "${v_lm} last day" +%Y%m%d`
v_llm_rq=`date -d "${v_lm} last month last day" +%Y%m%d`

#当前日期
echo ${v_curr_rq}

#昨天日期
echo ${v_rq}

#本月月初
echo ${v_lm}

#上个月月末
echo ${v_lm_rq}

#上上个月月末
echo ${v_llm_rq}