linux 比较日期大小写

#!/bin/bash

date1="2023-04-01"
date2="2023-04-15"

# 将日期转换为时间戳
timestamp1=$(date -d "$date1" +%s)
timestamp2=$(date -d "$date2" +%s)

# 比较时间戳
if [ $timestamp1 -lt $timestamp2 ]; then
    echo "$date1 is earlier than $date2"
elif [ $timestamp1 -gt $timestamp2 ]; then
    echo "$date1 is later than $date2"
else
    echo "$date1 is the same as $date2"
fi

#!/bin/bash

date1="2023-04-01"
date2="2023-04-15"

# 使用 date 命令的比较功能
if date -d "$date1" "+%s" < date -d "$date2" "+%s"; then
    echo "$date1 is earlier than $date2"
elif date -d "$date1" "+%s" > date -d "$date2" "+%s"; then
    echo "$date1 is later than $date2"
else
    echo "$date1 is the same as $date2"
fi