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1 perry 1 CHAGE
2 !!!CHAGE
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 FILES
7 SEE ALSO
8 AUTHOR
9 ----
10 !!NAME
11
12
13 chage - change user password expiry information
14 !!SYNOPSIS
15
16
17 __chage__
18
19
20 [[__-m__ ''mindays''] [[__-M__ ''maxdays'']
21 [[__-d__ ''lastday''] [[__-I__ ''inactive'']
22 [[__-E__ ''expiredate''] [[__-W__ ''warndays'']
23 ''user''
24
25
26 __chage__
27
28
29 __-l__ ''user''
30 !!DESCRIPTION
31
32
33 __chage__ changes the number of days between password
34 changes and the date of the last password change. This
35 information is used by the system to determine when a user
36 must change her password. The __chage__ command is
37 restricted to the root user, except for the __-l__
38 option, which may be used by an unprivileged user to
39 determine when her password or account is due to
40 expire.
41
42
43 With the __-m__ option, the value of ''mindays'' is
44 the minimum number of days between password changes. A value
45 of zero for this field indicates that the user may change
46 her password at any time.
47
48
49 With the __-M__ option, the value of ''maxdays'' is
50 the maximum number of days during which a password is valid.
51 When ''maxdays'' plus ''lastday'' is less than the
52 current day, the user will be required to change her
53 password before being able to use her account. This
54 occurance can be planned for in advance by use of the
55 __-W__ option, which provides the user with advance
56 warning.
57
58
59 With the __-d__ option, the value of ''lastday'' is
60 the number of days since January 1st, 1970 when the password
61 was last changed. The date may also be expressed in the
62 format YYYY-MM-DD (or the format more commonly used in your
63 area).
64
65
66 The __-E__ option is used to set a date on which the
67 user's account will no longer be accessible. The
68 ''expiredate'' option is the number of days since January
69 1, 1970 on which the accounted is locked. The date may also
70 be expressed in the format YYYY-MM-DD (or the format more
71 commonly used in your area). A user whose account is locked
72 must contact the system administrator before being able to
73 use the system again.
74
75
76 The __-I__ option is used to set the number of days of
77 inactivity after a password has expired before the account
78 is locked. A user whose account is locked must contact the
79 system administrator before being able to use the system
80 again. The ''inactive'' option is the number of days of
81 inactivity. A value of 0 disables this feature.
82
83
84 The __-W__ option is used to set the number of days of
85 warning before a password change is required. The
86 ''warndays'' option is the number of days prior to the
87 password expiring that a user will be warned her password is
88 about to expire.
89
90
91 If none of the options are selected, __chage__ operates
92 in an interactive fashion, prompting the user with the
93 current values for all of the fields. Enter the new value to
94 change the field, or leave the line blank to use the current
95 value. The current value is displayed between a pair of __[[
96 ]__ marks.
97
98
99 Note that this functionality is not available if shadow
100 passwords are not enabled.
101 !!FILES
102
103
104 /etc/passwd - user account information
105 /etc/shadow - shadow user account information
106 !!SEE ALSO
107
108
109 passwd(5), shadow(5)
110 !!AUTHOR
111
112
113 Julianne Frances Haugh (jfh@austin.ibm.com)
114 ----
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