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libuser.conf: configuration for libuser and libuser utilities
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Command to display libuser.conf
manual in Linux: $ man 5 libuser.conf
NAME
libuser.conf - configuration for libuser and libuser utilities
FILE FORMAT
libuser.confis a text file.Leading and trailing white space on each line is ignored.Lines starting with#are ignored.The file defines variables grouped into sections. Each section starts witha section header:
- variable=value
Avariablecan have more than one value, specified by using more than one linedefining that variable.All currently defined variables accept only the first value and ignorethe others, if any.
[defaults]
Possible values are des, md5, blowfish,sha256and sha512, all case-insensitive.Unrecognized values are treated as des.Default value is des.
If only one of the above variables is specified, the number of rounds used isspecified by the other variable.If neither variable is specified, the number of rounds is chosen by libc.
[import]
Variable | Imported as |
ENCRYPT_METHOD | |
GID_MIN | groupdefaults/LU_GIDNUMBER |
MAIL_DIR | defaults/mailspooldir |
MD5_CRYPT_ENAB | defaults/crypt_style |
PASS_MAX_DAYS | userdefaults/LU_SHADOWMAX |
PASS_MIN_DAYS | userdefaults/LU_SHADOWMIN |
PASS_WARN_AGE | userdefaults/LU_SHADOWWARNING |
SHA_CRYPT_MIN_ROUNDS | defaults/hash_rounds_min |
SHA_CRYPT_MAX_ROUNDS | defaults/hash_rounds_max |
UID_MIN | userdefaults/LU_UIDNUMBER |
The following variables arenotimported:CREATE_HOME, GID_MAX, MAIL_FILE, SYSLOG_SG_ENAB,UID_MAX, UMASK, USERDEL_CMD, USERGROUPS_ENAB
Variable | Imported as |
EXPIRE | |
GROUP | userdefaults/LU_GIDNUMBER |
HOME | userdefaults/LU_HOMEDIRECTORY |
INACTIVE | userdefaults/LU_SHADOWINACTIVE |
SHELL | userdefaults/LU_LOGINSHELL |
SKEL | defaults/skeleton |
TheHOMEvariable value has/%nappended to it before importing.
[userdefaults]
This section defines attribute values of newly created user entities.There is one special variable:- %character and avoid this substitution.
- directory
- The directory containing thegshadowandshadowfiles.Default value is /etc.
- nonroot
- Allow module initialization when not invoked as therootuser if the value is yes.
- userBranch
- The LDAP suffix for user entities.Default value is ou=People.
- groupBranch
- The LDAP suffix for group entities.Default value is ou=Group.
- server
- A domain name or an URI of the LDAP server.The URI can use the ldap,ldapior theldapsprotocol.When a simple domain name is used,the connection fails if TLS can not be used;an URI using theldapprotocol allows connection without TLS.TLS is never used with theldapiprotocol.Default value is ldap.
- basedn
- The base DN of the server.Default value is dc=example,dc=com.
- binddn
- A DN for binding to the server.If the value is empty or binding using this DN fails,a DN of uid=user,userBranch,basedn is used, whereuserBranchandbasednare variables from this sectionanduseris the user name of the invoking user, unless overridden by theuservariable from this section.Default value is cn=manager,dc=example,dc=com.
- user
- The SASLv2 identity for authenticating to the LDAP server,also overrides the user name for generating a bind DN.Default value is the name of the invoking user.
- password The password used for a simple bind by default. If not specified, there isno default and the user must supply the password each time.
- authuser
- The SASLv2 authorization user, if non-empty.Default value is empty.
- bindtype
- The list of bind types to use, separated by commas.Allowed bind types are simple, sasl, and sasl/mechanism,wheremechanismis a SASL mechanism.The bind types (but not necessarily mechanism) are case-insensitive.If more than one bind type is specified, their relative order is ignored.Default value is simple,sasl.
- /etc/libuser.conf
- The default location of the configuration file. Can be overriddenby theLIBUSER_CONFenvironment variable, except in set-uid or set-gid programs.
- libuser (5) - configuration for libuser and libuser utilities
- libao.conf (5) - configuration for libao.
- libao (5) - configuration for libao.
- libaudit.conf (5) - libaudit configuration file
- libaudit (5) - libaudit configuration file
- libguestfs-tools.conf (5) - configuration file for guestfish, guestmount, virt-rescue
- libipmiconsole.conf (5) - specify default values for libipmiconsole
After theuserdefaultssection is processed, modules may define additional attributesor even override the attributes defined in this section.
[groupdefaults]
Thegroupdefaultssection is similar to userdefaults.There is one special variable:After thegroupdefaultssection is processed, modules may define additional attributesor even override the attributes defined in this section.
[files]
Configures thefilesmodule, which manages/etc/groupand /etc/passwd.The configuration variables are probably useful only forlibuserdevelopment.[ldap]
Configures theldapmodule, which manages an user database accessible using LDAP.IT IS STRONGLY RECOMMENDED NOT TO STORE A PASSWORD IN THE SYSTEM-WIDE/etc/libuser.confFILE.The configuration file is world-readable by default,and setuid programs that prompt for a server name could be usedto send the password to an attacker-controlled server.