When specifying time with find options such as -mmin (minutes) or -mtime (24 hour periods, starting from now), you can specify a number n to mean exactly n, -n to mean less than n, and +n to mean more than n.
Fractional 24-hour periods are truncated! That means that find -mtime +1 says to match files modified two or more days ago.
For example:
find . -mtime 0 # find files modified between now and 1 day ago
# (i.e., within the past 24 hours)
find . -mtime -1 # find files modified less than 1 day ago
# (i.e., within the past 24 hours, as before)
find . -mtime 1 # find files modified between 24 and 48 hours ago
find . -mtime +1 # find files modified more than 48 hours ago
find . -mmin +5 -mmin -10 # find files modifed between
# 6 and 9 minutes ago
※ 24시간 이내에 수정된 .php 확장자를 찾는경우
find . -name '*.php' -mtime -1 -print
※ 24시간 이내에 수정된 모든 파일을 찾는 경우
find . -mtime -1 -print