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리눅스

[리눅스] chage 명령어

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chage 명령어

명령어 사용 방법

chage [옵션]
-i : chage설정 내용을 확인
-m : 새로운 패스워드를 변경할수있는 최소일수
-M : 유효한 패스워드의 최대일수
-W : 사용자가 패스워드를 바꿀때까지 경고할 일수
-E : 뒤의 만료일 날짜 시간을 정해준다
-d : 사용자가 패스워드를 변경한 마지막 일자

$ chage --help
Usage: chage [options] LOGIN

Options:
  -d, --lastday LAST_DAY        set date of last password change to LAST_DAY
  -E, --expiredate EXPIRE_DATE  set account expiration date to EXPIRE_DATE
  -h, --help                    display this help message and exit
  -I, --inactive INACTIVE       set password inactive after expiration
                                to INACTIVE
  -l, --list                    show account aging information
  -m, --mindays MIN_DAYS        set minimum number of days before password
                                change to MIN_DAYS
  -M, --maxdays MAX_DAYS        set maximim number of days before password
                                change to MAX_DAYS
  -R, --root CHROOT_DIR         directory to chroot into
  -W, --warndays WARN_DAYS      set expiration warning days to WARN_DAYS

리눅스 패스워드 변경일(Last password change) 수정

마지막 패스워드 변경일 조회

chage -l devops

$ chage -l devops
Last password change                                    : Jun 01, 2021
Password expires                                        : never
Password inactive                                       : never
Account expires                                         : never
Minimum number of days between password change          : 0
Maximum number of days between password change          : 99999
Number of days of warning before password expires       : 7

마지막 패스워드 변경일 수정(업데이트)

chage -d 2021-06-09 devops

$ date
Wed Jun  9 21:50:54 KST 2021

$ chage -d 2021-06-09 devops

$ chage -l devops
Last password change                                    : Jun 09, 2021
Password expires                                        : never
Password inactive                                       : never
Account expires                                         : never
Minimum number of days between password change          : 0
Maximum number of days between password change          : 99999
Number of days of warning before password expires       : 7

chage -M 3 -E 2007/04/21 test123

###3일 뒤에 test123의 패스워드를 바꿔야 하며, 3일 뒤에는 로그인 불가함
$ chage -M 3 -E 2007/04/21 test123

모든 계정의 비밀번호 유효기간 조회

for i in `cut -f1 -d: /etc/passwd`; do echo; echo 'id:' $i; chage -l "$i"; done
$ for i in `cut -f1 -d: /etc/passwd`; do echo; echo 'id:' $i; chage -l "$i"; done

id: root
Last password change					: Apr 15, 2022
Password expires					: never
Password inactive					: never
Account expires						: never
Minimum number of days between password change		: 0
Maximum number of days between password change		: 99999
Number of days of warning before password expires	: 7

id: daemon
Last password change					: Apr 15, 2022
Password expires					: never
Password inactive					: never
Account expires						: never
Minimum number of days between password change		: 0
Maximum number of days between password change		: 99999
Number of days of warning before password expires	: 7

...

id: systemd-network
Last password change					: Apr 25, 2022
Password expires					: never
Password inactive					: never
Account expires						: never
Minimum number of days between password change		: 0
Maximum number of days between password change		: 99999
Number of days of warning before password expires	: 7

id: systemd-resolve
Last password change					: Apr 25, 2022
Password expires					: never
Password inactive					: never
Account expires						: never
Minimum number of days between password change		: 0
Maximum number of days between password change		: 99999
Number of days of warning before password expires	: 7
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