Ubuntu Feisty 7.04 manual page repository
Ubuntu is a free computer operating system based on the Linux kernel. Many IT companies, like DeployIS is using it to provide an up-to-date, stable operating system.
Provided by: adduser_3.100_all
adduser, addgroup - add a user or group to the system
adduser [options] [--home DIR] [--shell|-s SHELL] [--no-create-home] [--uid ID] [--firstuid ID] [--lastuid ID] [--ingroup GROUP | --gid ID] [--disabled-password] [--disabled-login] [--gecos GECOS] [--add_extra_groups] user adduser --system [options] [--home DIR] [--shell SHELL] [--no-create- home] [--uid ID] [--group | --ingroup GROUP | --gid ID] [--disabled- password] [--disabled-login] [--gecos GECOS] user adduser --group [options] [--gid ID] group addgroup [options] [--gid ID] group adduser --group --system [options] [--gid ID] group addgroup --system [options] [--gid ID] group adduser [options] user group COMMON OPTIONS [--quiet] [--debug] [--force-badname] [--help|-h] [--version] [--conf FILE]
adduser and addgroup add users and groups to the system according to command line options and configuration information in /etc/adduser.conf. They are friendlier front ends to the low level tools like useradd, groupadd and usermod programs, choosing Debian pol‐ icy conformant UID and GID values, creating a home directory with skeletal configuration, running a custom script, and other features. adduser and addgroup can be run in one of five modes: Add a normal user If called with one non-option argument and without the --system or --group options, adduser will add a normal user. adduser will choose the first available UID from the range specified for normal users in the configuration file. The UID can be overridden with the --uid option. The range specified in the configuration file may be overridden with the --firstuid and --lastuid options. By default, each user in Debian GNU/Linux is given a corresponding group with the same name. Usergroups allow group writable directories to be easily maintained by placing the appropriate users in the new group, setting the set-group-ID bit in the directory, and ensuring that all users use a umask of 002. If this option is turned off by setting USERGROUPS to no, all users’ GIDs are set to USERS_GID. Users’ groups can also be overridden from the command line with the --gid or --ingroup options to set the group by id or name, respectively. Also, users can be added to one or more groups defined in adduser.conf either by setting ADD_EXTRA_GROUPS to 1 in adduser.conf, or by passing --add_extra_groups on the commandline. adduser will create a home directory subject to DHOME, GROUPHOMES, and LETTERHOMES. The home directory can be overridden from the command line with the --home option, and the shell with the --shell option. The home directory’s set-group-ID bit is set if USERGROUPS is yes so that any files created in the user’s home directory will have the correct group. adduser will copy files from SKEL into the home directory and prompt for finger (gecos) information and a password. The gecos may also be set with the --gecos option. With the --disabled-login option, the account will be created but will be disabled until a password is set. The --disabled-password option will not set a password, but login is still possible (for example with SSH RSA keys). If the file /usr/local/sbin/adduser.local exists, it will be executed after the user account has been set up in order to do any local setup. The arguments passed to adduser.local are: username uid gid home-directory The environment variable VERBOSE is set according to the following rule: 0 if --quiet is specified 1 if neither --quiet nor --debug is specified 2 if --debug is specified (The same applies to the variable DEBUG, but DEBUG is deprecated and will be removed in a later version of adduser.) Add a system user If called with one non-option argument and the --system option, adduser will add a system user. If a user with the same name already exists in the system uid range (or, if the uid is specified, if a user with that uid already exists), adduser will exit with a warning. adduser will choose the first available UID from the range specified for system users in the configuration file. The UID can be overridden with the --uid option. By default, system users are placed in the nogroup group. To place the new system user in an already existing group, use the --gid or --ingroup options. To place the new system user in a new group with the same ID, use the --group option. A home directory is created by the same rules as for normal users. The new system user will have the shell /bin/false (unless overridden with the --shell option), and have logins disabled. Skeletal configuration files are not copied. Add a user group If adduser is called with the --group option and without the --system option, or addgroup is called respectively, a user group will be added. A GID will be chosen from the range specified for user UIDS in the con‐ figuration file. The GID can be overridden with the --gid option. The group is created with no users. Add a system group If addgroup is called with the --system option, a system group will be added. A GID will be chosen from the range specified for system GIDS in the configuration file. The GID can be overridden with the --gid option. The group is created with no users. Add an existing user to an existing group If called with two non-option arguments, adduser will add an existing user to an existing group.
--conf FILE Use FILE instead of /etc/adduser.conf. --disabled-login Do not run passwd to set the password. The user won’t be able to use her account until the password is set. --disabled-password Like --disabled-login, but logins are still possible (for exam‐ ple using SSH RSA keys) but not using password authentication. --force-badname By default, user and group names are checked against a config‐ urable regular expression. This option forces adduser and addgroup to apply only a weak check for validity of the name. --gecos GECOS Set the gecos field for the new entry generated. adduser will not ask for finger information if this option is given. --gid ID When creating a group, this option forces the new groupid to be the given number. When creating a user, this option will put the user in that group. --group When combined with --system, a group with the same name and ID as the system user is created. If not combined with --system, a group with the given name is created. This is the default action if the program is invoked as addgroup. --help Display brief instructions. --home DIR Use DIR as the user’s home directory, rather than the default specified by the configuration file. If the directory does not exist, it is created and skeleton files are copied. --shell SHELL Use SHELL as the user’s login shell, rather than the default specified by the configuration file. --ingroup GROUP Add the new user to GROUP instead of a usergroup or the default group defined by USERS_GID in the adduser.conf file. --no-create-home Do not create the home directory, even if it doesn’t exist. --quiet Suppress informational messages, only show warnings and errors. --debug Be verbose, most useful if you want to nail down a problem with adduser. --system Create a system user. --uid ID Force the new userid to be the given number. adduser will fail if the userid is already taken. --firstuid ID Override the first uid in the range that the uid is chosen from. --lastuid ID Override the last uid in the range that the uid is chosen from. --add_extra_groups Add new user to extra groups defined in adduser.conf --version Display version and copyright information.
/etc/adduser.conf usermod(8), Debian Policy 9.2.2.
Copyright (C) 1997, 1998, 1999 Guy Maor. Modifications by Roland Bauer‐ schmidt and Marc Haber. Copyright (C) 1995 Ted Hajek, with a great deal borrowed from the orig‐ inal Debian adduser Copyright (C) 1994 Ian Murdock. adduser is free software; see the GNU General Public Licence version 2 or later for copying conditions. There is no warranty.