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CentOS 7.0 - man page for lnewusers (centos section 1)

lnewusers(1)						      General Commands Manual						      lnewusers(1)

lnewusers - Create new user accounts
lnewusers [OPTION]...
Creates new user accounts using data read from standard input. The input data consists of lines, each line has 7 colon-separated fields: User name Plaintext password User ID lnewusers refuses to create users with user ID 0 (the root user ID). Group If this field is a valid group ID, it is interpreted as a group ID, otherwise as a group name. If the field is empty, a group name equal to user name is used. If the specified group does not exist, it is automatically created. If the group is specified with a group ID, the created group has group name equal to the user name. GECOS The GECOS field is traditionally used to store user's real name and other information. Home directory If this field is empty, a default specified by libuser configuration, or /home/username if libuser configuration does not specify a default, is used. Login shell If this field is empty, a default specified by libuser configuration is used. Errors in user specifications are reported and processing continues on the next line.
-f, --file=file Read account data from file instead of standard input. -i, --interactive Ask all questions when connecting to the user database, even if default answers are set up in libuser configuration. -M, --nocreatehome Don't create home directories. -n, --nocreatemail Don't create mail spool files.
The exit status is 0 on success, nonzero on fatal error. Errors in user specifications are not reflected in the exit status. libuser Jul 13 2008 lnewusers(1)