PAM_USERDB - Online Linux Manual PageSection : 8
Updated : 09/03/2021
Source : Linux-PAM Manual
Note : Linux−PAM Manual
NAMEpam_userdb − PAM module to authenticate against a db database
SYNOPSISpam_userdb.so db=/path/database [debug] [crypt=[crypt|none]] [icase] [dump] [try_first_pass] [use_first_pass] [unknown_ok] [key_only]
DESCRIPTIONThe pam_userdb module is used to verify a username/password pair against values stored in a Berkeley DB database. The database is indexed by the username, and the data fields corresponding to the username keys are the passwords.
OPTIONScrypt=[crypt|none] Indicates whether encrypted or plaintext passwords are stored in the database. If it is crypt, passwords should be stored in the database in crypt(3) form. If none is selected, passwords should be stored in the database as plaintext. db=/path/database Use the /path/database database for performing lookup. There is no default; the module will return PAM_IGNORE if no database is provided. Note that the path to the database file should be specified without the .db suffix. debug Print debug information. Note that password hashes, both from db and computed, will be printed to syslog. dump Dump all the entries in the database to the log. Don't do this by default! icase Make the password verification to be case insensitive (ie when working with registration numbers and such). Only works with plaintext password storage. try_first_pass Use the authentication token previously obtained by another module that did the conversation with the application. If this token can not be obtained then the module will try to converse. This option can be used for stacking different modules that need to deal with the authentication tokens. use_first_pass Use the authentication token previously obtained by another module that did the conversation with the application. If this token can not be obtained then the module will fail. This option can be used for stacking different modules that need to deal with the authentication tokens. unknown_ok Do not return error when checking for a user that is not in the database. This can be used to stack more than one pam_userdb module that will check a username/password pair in more than a database. key_only The username and password are concatenated together in the database hash as 'username−password' with a random value. if the concatenation of the username and password with a dash in the middle returns any result, the user is valid. this is useful in cases where the username may not be unique but the username and password pair are.
MODULE TYPES PROVIDEDThe auth and account module types are provided.
RETURN VALUESPAM_AUTH_ERR Authentication failure. PAM_AUTHTOK_RECOVERY_ERR Authentication information cannot be recovered. PAM_BUF_ERR Memory buffer error. PAM_CONV_ERR Conversation failure. PAM_SERVICE_ERR Error in service module. PAM_SUCCESS Success. PAM_USER_UNKNOWN User not known to the underlying authentication module.
EXAMPLESauth sufficient pam_userdb.so icase db=/etc/dbtest
SEE ALSOcrypt(3), pam.conf(5), pam.d(5), pam(8)
AUTHORpam_userdb was written by Cristian Gafton >gafton@redhat.com<. 0
Johanes Gumabo
Data Size : 14,064 byte
man-pam_userdb.8Build : 2024-12-05, 20:55 :
Visitor Screen : x
Visitor Counter ( page / site ) : 2 / 182,791
Visitor ID : :
Visitor IP : 3.17.181.112 :
Visitor Provider : AMAZON-02 :
Provider Position ( lat x lon ) : 39.962500 x -83.006100 : x
Provider Accuracy Radius ( km ) : 1000 :
Provider City : Columbus :
Provider Province : Ohio , : ,
Provider Country : United States :
Provider Continent : North America :
Visitor Recorder : Version :
Visitor Recorder : Library :
Online Linux Manual Page : Version : Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
Online Linux Manual Page : Library : lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page : Library : lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base : Version : Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base : Library : lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36
Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .
If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.