1yppasswd(1) General Commands Manual yppasswd(1)
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6 yppasswd, ypchfn, ypchsh - change your password in the NIS database
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9 yppasswd [-f] [-l] [-p] [user]
10 ypchfn [user]
11 ypchsh [user]
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14 In the old days, the standard passwd(1), chfn(1) and chsh(1) tools
15 could not be used under Linux to change the users NIS password, shell
16 and GECOS information. For changing the NIS information, they were
17 replaced by their NIS counterparts, yppasswd, ypchfn and ypchsh.
18 Today, this versions are deprecated and should not be used any longer.
20 Using the command line switches, you can choose whether to update your
22 password -p, your login shell -l, or your GECOS field -f, or a combina‐
23 tion of them. yppasswd implies the -p option, if no other option is
24 given. If you use the -f or -l option, you also need to add the -p
25 flag. ypchfn implies the -f option, and ypchsh -l.
26 When invoked without the user argument, the account information for the
28 invoking user will be updated, otherwise that of user will be updated.
29 This option is only available to the super-user. If the yppasswdd dae‐
30 mon on the server supports it, you can give the root password of the
31 server instead of the users [old] password.
32 All tools will first prompt the user for the current NIS password
34 needed for authentication with the yppasswdd(8) daemon. Subsequently,
35 the program prompts for the updated information:
36 If we use shadowing passwords using passwd.adjunct, SHA-512 will be
38 used for hashing a new password by default. If we want to use MD5,
39 SHA_256 or older DES, we need to set the environment variable
40 YP_PASSWD_HASH. Possible values are "DES", "MD5", "SHA-256" and
41 "SHA-512" (value is case-insensitive).
42 yppasswd or -p
44 Change the user's NIS password. The user is prompted for the
45 new password. While typing the password, echoing is turned off,
46 so the password does not appear on the screen. An empty password
47 is rejected, as are passwords shorter than six characters. The
48 user will then be requested to retype the password to make sure
49 it wasn't misspelled the first time.
50 ypchsh or -l
52 Change the user's login shell. The user is prompted for a new
53 shell, offering the old one as default:
54 Login shell [/bin/sh]: _
56 To accept the default, simply press return. To clear the shell
58 field in your passwd(5) file entry (so that the system's default
59 shell is selected), enter the string none.
60 ypchfn or -f
62 Change the user's full name and related information. Tradition‐
63 ally, some applications expect the GECOS field (field 4) of the
64 passwd(5) file to contain the user's real name (as opposed to
65 the login name) plus some additional information like the office
66 phone number. This information is displayed by finger(1) and
67 probably some other tools, too.
68 When setting the full name, ypchfn displays the following
70 prompts, with the defaults in brackets:
71 Name [Joe Doe]:
73 Location [2nd floor, bldg 34]:
74 Office Phone [12345]:
75 Home Phone []:
76 To accept a default, simply press return. To clear a field,
78 enter the string none.
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81 yppasswd cannot do password checks on systems, where shadow passwords
82 are enabled. On such systems, a PAM enabled passwd(1) should be used.
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85 chfn(1), chsh(1), finger(1), passwd(5), passwd(1), ypcat(1), yppass‐
86 wdd(8), ypserv(8), ypwhich(1)
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89 yppasswd is part of the yp-tools package, which was written by Thorsten
90 Kukuk <kukuk@linux-nis.org>.
91YP Tools 4.2.3 Febrary 2016 yppasswd(1)