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Diffstat (limited to 'man/man8/newusers.8')
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diff --git a/man/man8/newusers.8 b/man/man8/newusers.8 new file mode 100644 index 0000000..58c05d8 --- /dev/null +++ b/man/man8/newusers.8 @@ -0,0 +1,453 @@ +'\" t +.\" Title: newusers +.\" 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 "NEWUSERS" "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" +newusers \- update and create new users in batch +.SH "SYNOPSIS" +.HP \w'\fBnewusers\fR\ 'u +\fBnewusers\fR [\fIoptions\fR] [\fIfile\fR] +.SH "DESCRIPTION" +.PP +The +\fBnewusers\fR +command reads a +\fIfile\fR +(or the standard input by default) and uses this information to update a set of existing users or to create new users\&. Each line is in the same format as the standard password file (see +\fBpasswd\fR(5)) with the exceptions explained below: +.PP +pw_name:pw_passwd:pw_uid:pw_gid:pw_gecos:pw_dir:pw_shell +.PP +\fIpw_name\fR +.RS 4 +This is the name of the user\&. +.sp +It can be the name of a new user or the name of an existing user (or a user created before by +\fBnewusers\fR)\&. In case of an existing user, the user\*(Aqs information will be changed, otherwise a new user will be created\&. +.RE +.PP +\fIpw_passwd\fR +.RS 4 +This field will be encrypted and used as the new value of the encrypted password\&. +.RE +.PP +\fIpw_uid\fR +.RS 4 +This field is used to define the UID of the user\&. +.sp +If the field is empty, a new (unused) UID will be defined automatically by +\fBnewusers\fR\&. +.sp +If this field contains a number, this number will be used as the UID\&. +.sp +If this field contains the name of an existing user (or the name of a user created before by +\fBnewusers\fR), the UID of the specified user will be used\&. +.sp +If the UID of an existing user is changed, the files ownership of the user\*(Aqs file should be fixed manually\&. +.RE +.PP +\fIpw_gid\fR +.RS 4 +This field is used to define the primary group ID for the user\&. +.sp +If this field contains the name of an existing group (or a group created before by +\fBnewusers\fR), the GID of this group will be used as the primary group ID for the user\&. +.sp +If this field is a number, this number will be used as the primary group ID of the user\&. If no groups exist with this GID, a new group will be created with this GID, and the name of the user\&. +.sp +If this field is empty, a new group will be created with the name of the user and a GID will be automatically defined by +\fBnewusers\fR +to be used as the primary group ID for the user and as the GID for the new group\&. +.sp +If this field contains the name of a group which does not exist (and was not created before by +\fBnewusers\fR), a new group will be created with the specified name and a GID will be automatically defined by +\fBnewusers\fR +to be used as the primary group ID for the user and GID for the new group\&. +.RE +.PP +\fIpw_gecos\fR +.RS 4 +This field is copied in the GECOS field of the user\&. +.RE +.PP +\fIpw_dir\fR +.RS 4 +This field is used to define the home directory of the user\&. +.sp +If this field does not specify an existing directory, the specified directory is created, with ownership set to the user being created or updated and its primary group\&. Note that +\fInewusers does not create parent directories \fR +of the new user\*(Aqs home directory\&. The newusers command will fail to create the home directory if the parent directories do not exist, and will send a message to stderr informing the user of the failure\&. The newusers command will not halt or return a failure to the calling shell if it fails to create the home directory, it will continue to process the batch of new users specified\&. +.sp +If the home directory of an existing user is changed, +\fBnewusers\fR +does not move or copy the content of the old directory to the new location\&. This should be done manually\&. +.RE +.PP +\fIpw_shell\fR +.RS 4 +This field defines the shell of the user\&. No checks are performed on this field\&. +.RE +.PP +\fBnewusers\fR +first tries to create or change all the specified users, and then write these changes to the user or group databases\&. If an error occurs (except in the final writes to the databases), no changes are committed to the databases\&. +.PP +This command is intended to be used in a large system environment where many accounts are updated at a single time\&. +.SH "OPTIONS" +.PP +The options which apply to the +\fBnewusers\fR +command are: +.PP +\fB\-\-badname\fR\ \& +.RS 4 +Allow names that do not conform to standards\&. +.RE +.PP +\fB\-c\fR, \fB\-\-crypt\-method\fR +.RS 4 +Use the specified method to encrypt the passwords\&. +.sp +The available methods are DES, MD5, NONE, and SHA256 or SHA512 if your libc support these methods\&. +.RE +.PP +\fB\-h\fR, \fB\-\-help\fR +.RS 4 +Display help message and exit\&. +.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 +login\&.defs, instead of +\fBUID_MIN\fR\-\fBUID_MAX\fR +(and their +\fBGID\fR +counterparts for the creation of groups)\&. +.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\-s\fR, \fB\-\-sha\-rounds\fR +.RS 4 +Use the specified number of rounds to encrypt the passwords\&. +.sp +The value 0 means that the system will choose the default number of rounds for the crypt method (5000)\&. +.sp +A minimal value of 1000 and a maximal value of 999,999,999 will be enforced\&. +.sp +You can only use this option with the SHA256 or SHA512 crypt method\&. +.sp +By default, the number of rounds is defined by the SHA_CRYPT_MIN_ROUNDS and SHA_CRYPT_MAX_ROUNDS variables in +/etc/login\&.defs\&. +.RE +.SH "CAVEATS" +.PP +The input file must be protected since it contains unencrypted passwords\&. +.PP +You should make sure the passwords and the encryption method respect the system\*(Aqs password policy\&. +.SH "CONFIGURATION" +.PP +The following configuration variables in +/etc/login\&.defs +change the behavior of this tool: +.PP +\fBENCRYPT_METHOD\fR (string) +.RS 4 +This defines the system default encryption algorithm for encrypting passwords (if no algorithm are specified on the command line)\&. +.sp +It can take one of these values: +\fIDES\fR +(default), +\fIMD5\fR, \fISHA256\fR, \fISHA512\fR\&. MD5 and DES should not be used for new hashes, see +crypt(5) +for recommendations\&. +.sp +Note: this parameter overrides the +\fBMD5_CRYPT_ENAB\fR +variable\&. +.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 +\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 +\fBMD5_CRYPT_ENAB\fR (boolean) +.RS 4 +Indicate if passwords must be encrypted using the MD5\-based algorithm\&. If set to +\fIyes\fR, new passwords will be encrypted using the MD5\-based algorithm compatible with the one used by recent releases of FreeBSD\&. It supports passwords of unlimited length and longer salt strings\&. Set to +\fIno\fR +if you need to copy encrypted passwords to other systems which don\*(Aqt understand the new algorithm\&. Default is +\fIno\fR\&. +.sp +This variable is superseded by the +\fBENCRYPT_METHOD\fR +variable or by any command line option used to configure the encryption algorithm\&. +.sp +This variable is deprecated\&. You should use +\fBENCRYPT_METHOD\fR\&. +.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 +\fBSHA_CRYPT_MIN_ROUNDS\fR (number), \fBSHA_CRYPT_MAX_ROUNDS\fR (number) +.RS 4 +When +\fBENCRYPT_METHOD\fR +is set to +\fISHA256\fR +or +\fISHA512\fR, this defines the number of SHA rounds used by the encryption algorithm by default (when the number of rounds is not specified on the command line)\&. +.sp +With a lot of rounds, it is more difficult to brute forcing the password\&. But note also that more CPU resources will be needed to authenticate users\&. +.sp +If not specified, the libc will choose the default number of rounds (5000), which is orders of magnitude too low for modern hardware\&. +.sp +The values must be inside the 1000\-999,999,999 range\&. +.sp +If only one of the +\fBSHA_CRYPT_MIN_ROUNDS\fR +or +\fBSHA_CRYPT_MAX_ROUNDS\fR +values is set, then this value will be used\&. +.sp +If +\fBSHA_CRYPT_MIN_ROUNDS\fR +> +\fBSHA_CRYPT_MAX_ROUNDS\fR, the highest value will be used\&. +.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 +.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/login\&.defs +.RS 4 +Shadow password suite configuration\&. +.RE +.PP +/etc/subgid +.RS 4 +Per user subordinate group IDs\&. +.RE +.PP +/etc/subuid +.RS 4 +Per user subordinate user IDs\&. +.RE +.SH "SEE ALSO" +.PP +\fBlogin.defs\fR(5), +\fBpasswd\fR(1), +\fBsubgid\fR(5), \fBsubuid\fR(5), +\fBuseradd\fR(8)\&. |