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Annotated edit history of shadow(5) version 1, including all changes. View license author blame.
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1 perry 1 SHADOW
2 !!!SHADOW
3 NAME
4 DESCRIPTION
5 FILES
6 SEE ALSO
7 AUTHOR
8 ----
9 !!NAME
10
11
12 shadow - encrypted password file
13 !!DESCRIPTION
14
15
16 ''shadow'' contains the encrypted password information
17 for user's accounts and optional the password aging
18 information. Included is
19
20
21 Login name
22
23
24 Encrypted password
25
26
27 Days since Jan 1, 1970 that password was last
28 changed
29
30
31 Days before password may be changed
32
33
34 Days after which password must be changed
35
36
37 Days before password is to expire that user is
38 warned
39
40
41 Days after password expires that account is
42 disabled
43
44
45 Days since Jan 1, 1970 that account is disabled
46
47
48 A reserved field
49
50
51 The password field must be filled. The encryped password
52 consists of 13 to 24 characters from the 64 character
53 alphabet a thru z, A thru Z, 0 thru 9, . and /. Refer to
54 crypt(3) for details on how this string is
55 interpreted. If the password field contains some string that
56 is not valid result of crypt(3), for instance ! or *,
57 the user will not be able to use a unix password to log in,
58 subject to pam(7).
59
60
61 The date of the last password change is given as the number
62 of days since Jan 1, 1970. The password may not be changed
63 again until the proper number of days have passed, and must
64 be changed after the maximum number of days. If the minimum
65 number of days required is greater than the maximum number
66 of day allowed, this password may not be changed by the
67 user.
68
69
70 An account is considered to be inactive and is disabled if
71 the password is not changed within the specified number of
72 days after the password expires. An account will also be
73 disabled on the specified day regardless of other password
74 expiration information.
75
76
77 This information supercedes any password or password age
78 information present in ''/etc/passwd''.
79
80
81 This file must not be readable by regular users if password
82 security is to be maintained.
83 !!FILES
84
85
86 /etc/passwd - user account information
87 /etc/shadow - encrypted user passwords
88 !!SEE ALSO
89
90
91 chage(1), login(1), passwd(1),
92 su(1), sulogin(8), passwd(5),
93 pwconv(8), pwunconv(8)
94 !!AUTHOR
95
96
97 Julianne Frances Haugh (jfh@austin.ibm.com)
98 ----
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