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diff --git a/man/man8/useradd.8 b/man/man8/useradd.8 new file mode 100644 index 0000000..e6530b3 --- /dev/null +++ b/man/man8/useradd.8 @@ -0,0 +1,827 @@ +'\" t +.\" Title: useradd +.\" Author: Julianne Frances Haugh +.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/> +.\" Date: 11/08/2022 +.\" Manual: System Management Commands +.\" Source: shadow-utils 4.13 +.\" Language: English +.\" +.TH "USERADD" "8" "11/08/2022" "shadow\-utils 4\&.13" "System Management Commands" +.\" ----------------------------------------------------------------- +.\" * Define some portability stuff +.\" ----------------------------------------------------------------- +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.\" http://bugs.debian.org/507673 +.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html +.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +.ie \n(.g .ds Aq \(aq +.el .ds Aq ' +.\" ----------------------------------------------------------------- +.\" * set default formatting +.\" ----------------------------------------------------------------- +.\" disable hyphenation +.nh +.\" disable justification (adjust text to left margin only) +.ad l +.\" ----------------------------------------------------------------- +.\" * MAIN CONTENT STARTS HERE * +.\" ----------------------------------------------------------------- +.SH "NAME" +useradd \- create a new user or update default new user information +.SH "SYNOPSIS" +.HP \w'\fBuseradd\fR\ 'u +\fBuseradd\fR [\fIoptions\fR] \fILOGIN\fR +.HP \w'\fBuseradd\fR\ 'u +\fBuseradd\fR \-D +.HP \w'\fBuseradd\fR\ 'u +\fBuseradd\fR \-D [\fIoptions\fR] +.SH "DESCRIPTION" +.PP +When invoked without the +\fB\-D\fR +option, the +\fBuseradd\fR +command creates a new user account using the values specified on the command line plus the default values from the system\&. Depending on command line options, the +\fBuseradd\fR +command will update system files and may also create the new user\*(Aqs home directory and copy initial files\&. +.PP +By default, a group will also be created for the new user (see +\fB\-g\fR, +\fB\-N\fR, +\fB\-U\fR, and +\fBUSERGROUPS_ENAB\fR)\&. +.SH "OPTIONS" +.PP +The options which apply to the +\fBuseradd\fR +command are: +.PP +\fB\-\-badname\fR\ \& +.RS 4 +Allow names that do not conform to standards\&. +.RE +.PP +\fB\-b\fR, \fB\-\-base\-dir\fR\ \&\fIBASE_DIR\fR +.RS 4 +The default base directory for the system if +\fB\-d\fR\ \&\fIHOME_DIR\fR +is not specified\&. +\fIBASE_DIR\fR +is concatenated with the account name to define the home directory\&. +.sp +If this option is not specified, +\fBuseradd\fR +will use the base directory specified by the +\fBHOME\fR +variable in +/etc/default/useradd, or +/home +by default\&. +.RE +.PP +\fB\-c\fR, \fB\-\-comment\fR\ \&\fICOMMENT\fR +.RS 4 +Any text string\&. It is generally a short description of the account, and is currently used as the field for the user\*(Aqs full name\&. +.RE +.PP +\fB\-d\fR, \fB\-\-home\-dir\fR\ \&\fIHOME_DIR\fR +.RS 4 +The new user will be created using +\fIHOME_DIR\fR +as the value for the user\*(Aqs login directory\&. The default is to append the +\fILOGIN\fR +name to +\fIBASE_DIR\fR +and use that as the login directory name\&. If the directory +\fIHOME_DIR\fR +does not exist, then it will be created unless the +\fB\-M\fR +option is specified\&. +.RE +.PP +\fB\-D\fR, \fB\-\-defaults\fR +.RS 4 +See below, the subsection "Changing the default values"\&. +.RE +.PP +\fB\-e\fR, \fB\-\-expiredate\fR\ \&\fIEXPIRE_DATE\fR +.RS 4 +The date on which the user account will be disabled\&. The date is specified in the format +\fIYYYY\-MM\-DD\fR\&. +.sp +If not specified, +\fBuseradd\fR +will use the default expiry date specified by the +\fBEXPIRE\fR +variable in +/etc/default/useradd, or an empty string (no expiry) by default\&. +.RE +.PP +\fB\-f\fR, \fB\-\-inactive\fR\ \&\fIINACTIVE\fR +.RS 4 +defines the number of days after the password exceeded its maximum age where the user is expected to replace this password\&. The value is stored in the shadow password file\&. An input of 0 will disable an expired password with no delay\&. An input of \-1 will blank the respective field in the shadow password file\&. See +\fBshadow\fR(5)for more information\&. +.sp +If not specified, +\fBuseradd\fR +will use the default inactivity period specified by the +\fBINACTIVE\fR +variable in +/etc/default/useradd, or \-1 by default\&. +.RE +.PP +\fB\-F\fR, \fB\-\-add\-subids\-for\-system\fR +.RS 4 +Update +/etc/subuid +and +/etc/subgid +even when creating a system account with +\fB\-r\fR +option\&. +.RE +.PP +\fB\-g\fR, \fB\-\-gid\fR\ \&\fIGROUP\fR +.RS 4 +The name or the number of the user\*(Aqs primary group\&. The group name must exist\&. A group number must refer to an already existing group\&. +.sp +If not specified, the behavior of +\fBuseradd\fR +will depend on the +\fBUSERGROUPS_ENAB\fR +variable in +/etc/login\&.defs\&. If this variable is set to +\fIyes\fR +(or +\fB\-U/\-\-user\-group\fR +is specified on the command line), a group will be created for the user, with the same name as her loginname\&. If the variable is set to +\fIno\fR +(or +\fB\-N/\-\-no\-user\-group\fR +is specified on the command line), useradd will set the primary group of the new user to the value specified by the +\fBGROUP\fR +variable in +/etc/default/useradd, or 1000 by default\&. +.RE +.PP +\fB\-G\fR, \fB\-\-groups\fR\ \&\fIGROUP1\fR[\fI,GROUP2,\&.\&.\&.\fR[\fI,GROUPN\fR]]] +.RS 4 +A list of supplementary groups which the user is also a member of\&. Each group is separated from the next by a comma, with no intervening whitespace\&. The groups are subject to the same restrictions as the group given with the +\fB\-g\fR +option\&. The default is for the user to belong only to the initial group\&. +.RE +.PP +\fB\-h\fR, \fB\-\-help\fR +.RS 4 +Display help message and exit\&. +.RE +.PP +\fB\-k\fR, \fB\-\-skel\fR\ \&\fISKEL_DIR\fR +.RS 4 +The skeleton directory, which contains files and directories to be copied in the user\*(Aqs home directory, when the home directory is created by +\fBuseradd\fR\&. +.sp +This option is only valid if the +\fB\-m\fR +(or +\fB\-\-create\-home\fR) option is specified\&. +.sp +If this option is not set, the skeleton directory is defined by the +\fBSKEL\fR +variable in +/etc/default/useradd +or, by default, +/etc/skel\&. +.sp +If possible, the ACLs and extended attributes are copied\&. +.RE +.PP +\fB\-K\fR, \fB\-\-key\fR\ \&\fIKEY\fR=\fIVALUE\fR +.RS 4 +Overrides +/etc/login\&.defs +defaults (\fBUID_MIN\fR, +\fBUID_MAX\fR, +\fBUMASK\fR, +\fBPASS_MAX_DAYS\fR +and others)\&. +.sp +Example: +\fB\-K\fR\ \&\fIPASS_MAX_DAYS \fR=\fI\-1\fR +can be used when creating an account to turn off password aging\&. Multiple +\fB\-K\fR +options can be specified, e\&.g\&.: +\fB\-K\fR\ \&\fIUID_MIN\fR +=\fI100\fR\ \&\fB\-K\fR\ \& +\fIUID_MAX\fR=\fI499\fR +.RE +.PP +\fB\-l\fR, \fB\-\-no\-log\-init\fR +.RS 4 +Do not add the user to the lastlog and faillog databases\&. +.sp +By default, the user\*(Aqs entries in the lastlog and faillog databases are reset to avoid reusing the entry from a previously deleted user\&. +.sp +If this option is not specified, +\fBuseradd\fR +will also consult the variable +\fBLOG_INIT\fR +in the +/etc/default/useradd +if set to no the user will not be added to the lastlog and faillog databases\&. +.RE +.PP +\fB\-m\fR, \fB\-\-create\-home\fR +.RS 4 +Create the user\*(Aqs home directory if it does not exist\&. The files and directories contained in the skeleton directory (which can be defined with the +\fB\-k\fR +option) will be copied to the home directory\&. +.sp +By default, if this option is not specified and +\fBCREATE_HOME\fR +is not enabled, no home directories are created\&. +.sp +The directory where the user\*(Aqs home directory is created must exist and have proper SELinux context and permissions\&. Otherwise the user\*(Aqs home directory cannot be created or accessed\&. +.RE +.PP +\fB\-M\fR, \fB\-\-no\-create\-home\fR +.RS 4 +Do not create the user\*(Aqs home directory, even if the system wide setting from +/etc/login\&.defs +(\fBCREATE_HOME\fR) is set to +\fIyes\fR\&. +.RE +.PP +\fB\-N\fR, \fB\-\-no\-user\-group\fR +.RS 4 +Do not create a group with the same name as the user, but add the user to the group specified by the +\fB\-g\fR +option or by the +\fBGROUP\fR +variable in +/etc/default/useradd\&. +.sp +The default behavior (if the +\fB\-g\fR, +\fB\-N\fR, and +\fB\-U\fR +options are not specified) is defined by the +\fBUSERGROUPS_ENAB\fR +variable in +/etc/login\&.defs\&. +.RE +.PP +\fB\-o\fR, \fB\-\-non\-unique\fR +.RS 4 +allows the creation of an account with an already existing UID\&. +.sp +This option is only valid in combination with the +\fB\-u\fR +option\&. As a user identity serves as key to map between users on one hand and permissions, file ownerships and other aspects that determine the system\*(Aqs behavior on the other hand, more than one login name will access the account of the given UID\&. +.RE +.PP +\fB\-p\fR, \fB\-\-password\fR\ \&\fIPASSWORD\fR +.RS 4 +defines an initial password for the account\&. PASSWORD is expected to be encrypted, as returned by +\fBcrypt \fR(3)\&. Within a shell script, this option allows to create efficiently batches of users\&. +.sp +Without this option, the new account will be locked and with no password defined, i\&.e\&. a single exclamation mark in the respective field of +/etc/shadow\&. This is a state where the user won\*(Aqt be able to access the account or to define a password himself\&. +.sp +\fBNote:\fRAvoid this option on the command line because the password (or encrypted password) will be visible by users listing the processes\&. +.sp +You should make sure the password respects the system\*(Aqs password policy\&. +.RE +.PP +\fB\-r\fR, \fB\-\-system\fR +.RS 4 +Create a system account\&. +.sp +System users will be created with no aging information in +/etc/shadow, and their numeric identifiers are chosen in the +\fBSYS_UID_MIN\fR\-\fBSYS_UID_MAX\fR +range, defined in +/etc/login\&.defs, instead of +\fBUID_MIN\fR\-\fBUID_MAX\fR +(and their +\fBGID\fR +counterparts for the creation of groups)\&. +.sp +Note that +\fBuseradd\fR +will not create a home directory for such a user, regardless of the default setting in +/etc/login\&.defs +(\fBCREATE_HOME\fR)\&. You have to specify the +\fB\-m\fR +options if you want a home directory for a system account to be created\&. +.sp +Note that this option will not update +/etc/subuid +and +/etc/subgid\&. You have to specify the +\fB\-F\fR +options if you want to update the files for a system account to be created\&. +.RE +.PP +\fB\-R\fR, \fB\-\-root\fR\ \&\fICHROOT_DIR\fR +.RS 4 +Apply changes in the +\fICHROOT_DIR\fR +directory and use the configuration files from the +\fICHROOT_DIR\fR +directory\&. Only absolute paths are supported\&. +.RE +.PP +\fB\-P\fR, \fB\-\-prefix\fR\ \&\fIPREFIX_DIR\fR +.RS 4 +Apply changes to configuration files under the root filesystem found under the directory +\fIPREFIX_DIR\fR\&. This option does not chroot and is intended for preparing a cross\-compilation target\&. Some limitations: NIS and LDAP users/groups are not verified\&. PAM authentication is using the host files\&. No SELINUX support\&. +.RE +.PP +\fB\-s\fR, \fB\-\-shell\fR\ \&\fISHELL\fR +.RS 4 +sets the path to the user\*(Aqs login shell\&. Without this option, the system will use the +\fBSHELL\fR +variable specified in +/etc/default/useradd, or, if that is as well not set, the field for the login shell in +/etc/passwd +remains empty\&. +.RE +.PP +\fB\-u\fR, \fB\-\-uid\fR\ \&\fIUID\fR +.RS 4 +The numerical value of the user\*(Aqs ID\&. This value must be unique, unless the +\fB\-o\fR +option is used\&. The value must be non\-negative\&. The default is to use the smallest ID value greater than or equal to +\fBUID_MIN\fR +and greater than every other user\&. +.sp +See also the +\fB\-r\fR +option and the +\fBUID_MAX\fR +description\&. +.RE +.PP +\fB\-U\fR, \fB\-\-user\-group\fR +.RS 4 +Create a group with the same name as the user, and add the user to this group\&. +.sp +The default behavior (if the +\fB\-g\fR, +\fB\-N\fR, and +\fB\-U\fR +options are not specified) is defined by the +\fBUSERGROUPS_ENAB\fR +variable in +/etc/login\&.defs\&. +.RE +.PP +\fB\-Z\fR, \fB\-\-selinux\-user\fR\ \&\fISEUSER\fR +.RS 4 +defines the SELinux user for the new account\&. Without this option, a SELinux uses the default user\&. Note that the shadow system doesn\*(Aqt store the selinux\-user, it uses +\fBsemanage\fR(8) +for that\&. +.RE +.SS "Changing the default values" +.PP +When invoked with only the +\fB\-D\fR +option, +\fBuseradd\fR +will display the current default values\&. When invoked with +\fB\-D\fR +plus other options, +\fBuseradd\fR +will update the default values for the specified options\&. Valid default\-changing options are: +.PP +\fB\-b\fR, \fB\-\-base\-dir\fR\ \&\fIBASE_DIR\fR +.RS 4 +sets the path prefix for a new user\*(Aqs home directory\&. The user\*(Aqs name will be affixed to the end of +\fIBASE_DIR\fR +to form the new user\*(Aqs home directory name, if the +\fB\-d\fR +option is not used when creating a new account\&. +.sp +This option sets the +\fBHOME\fR +variable in +/etc/default/useradd\&. +.RE +.PP +\fB\-e\fR, \fB\-\-expiredate\fR\ \&\fIEXPIRE_DATE\fR +.RS 4 +sets the date on which newly created user accounts are disabled\&. +.sp +This option sets the +\fBEXPIRE\fR +variable in +/etc/default/useradd\&. +.RE +.PP +\fB\-f\fR, \fB\-\-inactive\fR\ \&\fIINACTIVE\fR +.RS 4 +defines the number of days after the password exceeded its maximum age where the user is expected to replace this password\&. See +\fBshadow\fR(5)for more information\&. +.sp +This option sets the +\fBINACTIVE\fR +variable in +/etc/default/useradd\&. +.RE +.PP +\fB\-g\fR, \fB\-\-gid\fR\ \&\fIGROUP\fR +.RS 4 +sets the default primary group for newly created users, accepting group names or a numerical group ID\&. The named group must exist, and the GID must have an existing entry\&. +.sp +This option sets the +\fBGROUP\fR +variable in +/etc/default/useradd\&. +.RE +.PP +\fB\-s\fR, \fB\-\-shell\fR\ \&\fISHELL\fR +.RS 4 +defines the default login shell for new users\&. +.sp +This option sets the +\fBSHELL\fR +variable in +/etc/default/useradd\&. +.RE +.SH "NOTES" +.PP +The system administrator is responsible for placing the default user files in the +/etc/skel/ +directory (or any other skeleton directory specified in +/etc/default/useradd +or on the command line)\&. +.SH "CAVEATS" +.PP +You may not add a user to a NIS or LDAP group\&. This must be performed on the corresponding server\&. +.PP +Similarly, if the username already exists in an external user database such as NIS or LDAP, +\fBuseradd\fR +will deny the user account creation request\&. +.PP +Usernames may contain only lower and upper case letters, digits, underscores, or dashes\&. They can end with a dollar sign\&. Dashes are not allowed at the beginning of the username\&. Fully numeric usernames and usernames \&. or \&.\&. are also disallowed\&. It is not recommended to use usernames beginning with \&. character as their home directories will be hidden in the +\fBls\fR +output\&. +.PP +Usernames may only be up to 32 characters long\&. +.SH "CONFIGURATION" +.PP +The following configuration variables in +/etc/login\&.defs +change the behavior of this tool: +.PP +\fBCREATE_HOME\fR (boolean) +.RS 4 +Indicate if a home directory should be created by default for new users\&. +.sp +This setting does not apply to system users, and can be overridden on the command line\&. +.RE +.PP +\fBGID_MAX\fR (number), \fBGID_MIN\fR (number) +.RS 4 +Range of group IDs used for the creation of regular groups by +\fBuseradd\fR, +\fBgroupadd\fR, or +\fBnewusers\fR\&. +.sp +The default value for +\fBGID_MIN\fR +(resp\&. +\fBGID_MAX\fR) is 1000 (resp\&. 60000)\&. +.RE +.PP +\fBHOME_MODE\fR (number) +.RS 4 +The mode for new home directories\&. If not specified, the +\fBUMASK\fR +is used to create the mode\&. +.sp +\fBuseradd\fR +and +\fBnewusers\fR +use this to set the mode of the home directory they create\&. +.RE +.PP +\fBLASTLOG_UID_MAX\fR (number) +.RS 4 +Highest user ID number for which the lastlog entries should be updated\&. As higher user IDs are usually tracked by remote user identity and authentication services there is no need to create a huge sparse lastlog file for them\&. +.sp +No +\fBLASTLOG_UID_MAX\fR +option present in the configuration means that there is no user ID limit for writing lastlog entries\&. +.RE +.PP +\fBMAIL_DIR\fR (string) +.RS 4 +The mail spool directory\&. This is needed to manipulate the mailbox when its corresponding user account is modified or deleted\&. If not specified, a compile\-time default is used\&. The parameter CREATE_MAIL_SPOOL in +/etc/default/useradd +determines whether the mail spool should be created\&. +.RE +.PP +\fBMAIL_FILE\fR (string) +.RS 4 +Defines the location of the users mail spool files relatively to their home directory\&. +.RE +.PP +The +\fBMAIL_DIR\fR +and +\fBMAIL_FILE\fR +variables are used by +\fBuseradd\fR, +\fBusermod\fR, and +\fBuserdel\fR +to create, move, or delete the user\*(Aqs mail spool\&. +.PP +If +\fBMAIL_CHECK_ENAB\fR +is set to +\fIyes\fR, they are also used to define the +\fBMAIL\fR +environment variable\&. +.PP +\fBMAX_MEMBERS_PER_GROUP\fR (number) +.RS 4 +Maximum members per group entry\&. When the maximum is reached, a new group entry (line) is started in +/etc/group +(with the same name, same password, and same GID)\&. +.sp +The default value is 0, meaning that there are no limits in the number of members in a group\&. +.sp +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\&. +.sp +If you need to enforce such limit, you can use 25\&. +.sp +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\&. +.RE +.PP +\fBPASS_MAX_DAYS\fR (number) +.RS 4 +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)\&. +.RE +.PP +\fBPASS_MIN_DAYS\fR (number) +.RS 4 +The minimum number of days allowed between password changes\&. Any password changes attempted sooner than this will be rejected\&. If not specified, 0 will be assumed (which disables the restriction)\&. +.RE +.PP +\fBPASS_WARN_AGE\fR (number) +.RS 4 +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\&. +.RE +.PP +\fBSUB_GID_MIN\fR (number), \fBSUB_GID_MAX\fR (number), \fBSUB_GID_COUNT\fR (number) +.RS 4 +If +/etc/subuid +exists, the commands +\fBuseradd\fR +and +\fBnewusers\fR +(unless the user already have subordinate group IDs) allocate +\fBSUB_GID_COUNT\fR +unused group IDs from the range +\fBSUB_GID_MIN\fR +to +\fBSUB_GID_MAX\fR +for each new user\&. +.sp +The default values for +\fBSUB_GID_MIN\fR, +\fBSUB_GID_MAX\fR, +\fBSUB_GID_COUNT\fR +are respectively 100000, 600100000 and 65536\&. +.RE +.PP +\fBSUB_UID_MIN\fR (number), \fBSUB_UID_MAX\fR (number), \fBSUB_UID_COUNT\fR (number) +.RS 4 +If +/etc/subuid +exists, the commands +\fBuseradd\fR +and +\fBnewusers\fR +(unless the user already have subordinate user IDs) allocate +\fBSUB_UID_COUNT\fR +unused user IDs from the range +\fBSUB_UID_MIN\fR +to +\fBSUB_UID_MAX\fR +for each new user\&. +.sp +The default values for +\fBSUB_UID_MIN\fR, +\fBSUB_UID_MAX\fR, +\fBSUB_UID_COUNT\fR +are respectively 100000, 600100000 and 65536\&. +.RE +.PP +\fBSYS_GID_MAX\fR (number), \fBSYS_GID_MIN\fR (number) +.RS 4 +Range of group IDs used for the creation of system groups by +\fBuseradd\fR, +\fBgroupadd\fR, or +\fBnewusers\fR\&. +.sp +The default value for +\fBSYS_GID_MIN\fR +(resp\&. +\fBSYS_GID_MAX\fR) is 101 (resp\&. +\fBGID_MIN\fR\-1)\&. +.RE +.PP +\fBSYS_UID_MAX\fR (number), \fBSYS_UID_MIN\fR (number) +.RS 4 +Range of user IDs used for the creation of system users by +\fBuseradd\fR +or +\fBnewusers\fR\&. +.sp +The default value for +\fBSYS_UID_MIN\fR +(resp\&. +\fBSYS_UID_MAX\fR) is 101 (resp\&. +\fBUID_MIN\fR\-1)\&. +.RE +.PP +\fBUID_MAX\fR (number), \fBUID_MIN\fR (number) +.RS 4 +Range of user IDs used for the creation of regular users by +\fBuseradd\fR +or +\fBnewusers\fR\&. +.sp +The default value for +\fBUID_MIN\fR +(resp\&. +\fBUID_MAX\fR) is 1000 (resp\&. 60000)\&. +.RE +.PP +\fBUMASK\fR (number) +.RS 4 +The file mode creation mask is initialized to this value\&. If not specified, the mask will be initialized to 022\&. +.sp +\fBuseradd\fR +and +\fBnewusers\fR +use this mask to set the mode of the home directory they create if +\fBHOME_MODE\fR +is not set\&. +.sp +It is also used by +\fBlogin\fR +to define users\*(Aq initial umask\&. Note that this mask can be overridden by the user\*(Aqs GECOS line (if +\fBQUOTAS_ENAB\fR +is set) or by the specification of a limit with the +\fIK\fR +identifier in +\fBlimits\fR(5)\&. +.RE +.PP +\fBUSERGROUPS_ENAB\fR (boolean) +.RS 4 +Enable setting of the umask group bits to be the same as owner bits (examples: 022 \-> 002, 077 \-> 007) for non\-root users, if the uid is the same as gid, and username is the same as the primary group name\&. +.sp +If set to +\fIyes\fR, +\fBuserdel\fR +will remove the user\*(Aqs group if it contains no more members, and +\fBuseradd\fR +will create by default a group with the name of the user\&. +.RE +.SH "FILES" +.PP +/etc/passwd +.RS 4 +User account information\&. +.RE +.PP +/etc/shadow +.RS 4 +Secure user account information\&. +.RE +.PP +/etc/group +.RS 4 +Group account information\&. +.RE +.PP +/etc/gshadow +.RS 4 +Secure group account information\&. +.RE +.PP +/etc/default/useradd +.RS 4 +Default values for account creation\&. +.RE +.PP +/etc/shadow\-maint/useradd\-pre\&.d/*, /etc/shadow\-maint/useradd\-post\&.d/* +.RS 4 +Run\-part files to execute during user addition\&. The environment variable +\fBACTION\fR +will be populated with useradd and +\fBSUBJECT\fR +with the +\fBusername\fR\&. +useradd\-pre\&.d +will be executed prior to any user addition\&. +useradd\-post\&.d +will execute after user addition\&. If a script exits non\-zero then execution will terminate\&. +.RE +.PP +/etc/skel/ +.RS 4 +Directory containing default files\&. +.RE +.PP +/etc/subgid +.RS 4 +Per user subordinate group IDs\&. +.RE +.PP +/etc/subuid +.RS 4 +Per user subordinate user IDs\&. +.RE +.PP +/etc/login\&.defs +.RS 4 +Shadow password suite configuration\&. +.RE +.SH "EXIT VALUES" +.PP +The +\fBuseradd\fR +command exits with the following values: +.PP +\fI0\fR +.RS 4 +success +.RE +.PP +\fI1\fR +.RS 4 +can\*(Aqt update password file +.RE +.PP +\fI2\fR +.RS 4 +invalid command syntax +.RE +.PP +\fI3\fR +.RS 4 +invalid argument to option +.RE +.PP +\fI4\fR +.RS 4 +UID already in use (and no +\fB\-o\fR) +.RE +.PP +\fI6\fR +.RS 4 +specified group doesn\*(Aqt exist +.RE +.PP +\fI9\fR +.RS 4 +username or group name already in use +.RE +.PP +\fI10\fR +.RS 4 +can\*(Aqt update group file +.RE +.PP +\fI12\fR +.RS 4 +can\*(Aqt create home directory +.RE +.PP +\fI14\fR +.RS 4 +can\*(Aqt update SELinux user mapping +.RE +.SH "SEE ALSO" +.PP +\fBchfn\fR(1), +\fBchsh\fR(1), +\fBpasswd\fR(1), +\fBcrypt\fR(3), +\fBgroupadd\fR(8), +\fBgroupdel\fR(8), +\fBgroupmod\fR(8), +\fBlogin.defs\fR(5), +\fBnewusers\fR(8), +\fBsubgid\fR(5), \fBsubuid\fR(5), +\fBuserdel\fR(8), +\fBusermod\fR(8)\&. |