可能重复：
此脚本无法按年龄正确排序
我绝对不知道如何让这个脚本按出生日期对 Birthdays.csv 中的信息进行排序。我知道 sort -n 命令，但是我希望按 DOB 对文件birthdays.csv 进行排序。我该怎么做呢？
下面的脚本获取用户信息和出生日期，然后将这些信息放入一个名为“birthday.csv”的文件中。
然后我需要按出生日期对“birthdays.csv”进行排序，然后显示这个新排序的信息。我还计算了每个人到今天为止的年龄。我遇到的问题是按出生日期对birthdays.csv 中的信息进行排序。有人可以让我知道我会怎么做吗？
脚本如下：
a=0
while [ $a -lt 2 ];
do
echo Please enter a first name
read firstName
echo Please enter last name
read lastName
echo Please enter phone number
read phoneNumber
echo Please enter date of birth - format dd/mm/yyyy
read dob
echo "$firstName,$lastName,$phoneNumber,$dob" >> Birthdays.csv
echo If you would like to add another person press 1 or enter 2 to proceed
read a
done
INPUT=./Birthdays.csv
OLDIFS=$IFS
IFS=","
[ -f ${INPUT} ] && while read Name Surname Telephone DOB
do
birthMonth=${DOB:0:2}
birthDay=${DOB:3:2}
birthYear=${DOB:6:4}
currentDate=`date +%d/%m/%Y`
currentMonth=${currentDate:0:2}
currentDay=${currentDate:3:2}
currentYear=${currentDate:6:4}
if [[ "$currentMonth" -lt "$birthMonth" ]] || [[ "$currentMonth" -eq "$birthMonth" && "$currentDay" -lt "$$birthDay" ]]
then
let Age=currentYear-birthYear-1
else
let Age=currentYear-birthYear
fi
echo "Name : $Name"
echo "Surname : $Surname"
echo "Telephone : $Telephone"
echo "DOB : $DOB"
echo "Age : $Age"
echo "##########################################"
done < $INPUT
IFS=$OLDIFS
echo $DATE
exit 0;