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6 .\" Manual: Polecenia Zarządzania Systemem
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10 .TH "PWCONV" "8" "07/24/2009" "Polecenia Zarządzania Systemem" "Polecenia Zarządzania Systemem"
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22 pwconv, pwunconv, grpconv, grpunconv \- convert to and from shadow passwords and groups
24 .HP \w'\fBpwconv\fR\ 'u
26 .HP \w'\fBpwunconv\fR\ 'u
28 .HP \w'\fBgrpconv\fR\ 'u
30 .HP \w'\fBgrpunconv\fR\ 'u
40 and an optionally existing
60 and an optionally existing
74 These four programs all operate on the normal and shadow password and group files:
80 Each program acquires the necessary locks before conversion\&.
84 are similar\&. First, entries in the shadowed file which don\'t exist in the main file are removed\&. Then, shadowed entries which don\'t have `x\' as the password in the main file are updated\&. Any missing shadowed entries are added\&. Finally, passwords in the main file are replaced with `x\'\&. These programs can be used for initial conversion as well to update the shadowed file if the main file is edited by hand\&.
88 will use the values of
90 \fIPASS_MAX_DAYS\fR, and
94 when adding new entries to
101 are similar\&. Passwords in the main file are updated from the shadowed file\&. Entries which exist in the main file but not in the shadowed file are left alone\&. Finally, the shadowed file is removed\&. Some password aging information is lost by
102 \fBpwunconv\fR\&. It will convert what it can\&.
105 Errors in the password or group files (such as invalid or duplicate entries) may cause these programs to loop forever or fail in other strange ways\&. Please run
109 to correct any such errors before converting to or from shadow passwords or groups\&.
112 The following configuration variable in
114 changes the behavior of
119 \fBMAX_MEMBERS_PER_GROUP\fR (number)
121 Maximum members per group entry\&. When the maximum is reached, a new group entry (line) is started in
123 (with the same name, same password, and same GID)\&.
125 The default value is 0, meaning that there are no limits in the number of members in a group\&.
127 This feature (split group) permits to limit the length of lines in the group file\&. This is useful to make sure that lines for NIS groups are not larger than 1024 characters\&.
129 If you need to enforce such limit, you can use 25\&.
131 Note: split groups may not be supported by all tools (even in the Shadow toolsuite)\&. You should not use this variable unless you really need it\&.
134 The following configuration variables in
136 change the behavior of
139 \fBPASS_MAX_DAYS\fR (number)
141 The maximum number of days a password may be used\&. If the password is older than this, a password change will be forced\&. If not specified, \-1 will be assumed (which disables the restriction)\&.
144 \fBPASS_MIN_DAYS\fR (number)
146 The minimum number of days allowed between password changes\&. Any password changes attempted sooner than this will be rejected\&. If not specified, \-1 will be assumed (which disables the restriction)\&.
149 \fBPASS_WARN_AGE\fR (number)
151 The number of days warning given before a password expires\&. A zero means warning is given only upon the day of expiration, a negative value means no warning is given\&. If not specified, no warning will be provided\&.
157 Konfiguracja pakietu shadow\&.