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ADDUSER(8)                  System Manager's Manual                 ADDUSER(8)

       adduser - procedure for adding new users

       A  new  user must choose a login name, which must not already appear in
       /etc/passwd.  An account can be added by editing a line into the passwd
       file;  this  must  be  done with the password file locked e.g. by using

       A new user is given a group and user id.  User id's should be  distinct
       across a system, since they are used to control access to files.  Typi-
       cally, users working on similar projects will be put in the same group.
       Thus  at  UCB  we  have groups for system staff, faculty, graduate stu-
       dents, and a few special groups for large projects.   System  staff  is
       group "10" for historical reasons, and the super-user is in this group.

       A skeletal account for a new user "ernie" would look like:


       The first field is the login name  "ernie".   The  next  field  is  the
       encrypted  password  which  is  not given and must be initialized using
       passwd(1).  The next two fields are the user and  group  id's.   Tradi-
       tionally,  users  in  group  20  are graduate students and have account
       names with numbers in the 200's.   The  next  field  gives  information
       about  ernie's real name, office and office phone and home phone.  This
       information is used by the finger(1) program.  From this information we
       can tell that ernie's real name is "Ernie Kovacs" (the & here serves to
       repeat "ernie" with appropriate capitalization), that his office is 508
       Evans Hall, his extension is x2-7925, and this his home phone number is
       642-8202.  You can modify the finger(1) program if necessary  to  allow
       different  information to be encoded in this field.  The UCB version of
       finger knows several things particular to Berkeley - that phone  exten-
       sions start "2-", that offices ending in "E" are in Evans Hall and that
       offices ending in "C" are in Cory Hall.

       The final two fields give a login directory and  a  login  shell  name.
       Traditionally,  user files live on a file system which has the machines
       single letter net(1) address as the first of two characters.   Thus  on
       the  Berkeley  CS  Department  VAX,  whose Berknet address is ``csvax''
       abbreviated ``v''  the  user  file  systems  are  mounted  on  ``/va'',
       ``/vb'',  etc.   On each such filesystem there are subdirectories there
       for each group of users, i.e.: "/va/staff" and "/vb/prof".  This is not
       strictly  necessary  but  keeps  the  number  of files in the top level
       directories reasonably small.

       The login shell will default to "/bin/sh" if none is given.  Most users
       at Berkeley choose "/bin/csh" so this is usually specified here.

       It  is useful to give new users some help in getting started, supplying
       them with a few skeletal files such as .profile if they use  "/bin/sh",
       or .cshrc and .login if they use "/bin/csh".  The directory "/usr/skel"
       contains skeletal definitions of such files.  New users should be given
       copies of these files which, for instance, arrange to use tset(1) auto-
       matically at each login.

       /etc/passwd         password file
       /usr/skel           skeletal login directory

       passwd(1), finger(1), chsh(1), chfn(1), passwd(5), vipw(8)

       User information should be stored in its own data  base  separate  from
       the password file.

4th Berkeley Distribution       4 February 1983                     ADDUSER(8)