1.shell 获取时间 time1=$(date)
echo $time1
time2=$(date "+%Y%m%d%H%M%S")
echo $time2
time3=$(date "+%Y-%m-%d %H:%M:%S")
echo $time3
time4=$(date "+%Y.%m.%d")
echo $time4
# 1. 取今天时间
now=`date -d "now" +%Y-%m-%d`
echo $now
# 2.取昨天时间
yesterday=`date -d "yesterday" +%Y-%m-%d`
echo $yesterday
# 3.获取前 n……