I'm not familiar with ATT SVR4 — it was old before my time. But from your description, I think I can provide enough guidance to solve your problem.
Unix doesn't exactly have a notion of “administrator user”. That's a Windows name that doesn't map directly to a Unix concept. Under Unix, the only administrator account is root, user ID 0. Accounts that belong to physical users don't have such characteristics. An administrator is someone who knows the password to the root account. On systems that use sudo, such as Ubuntu, you can say that an administrator account is an account that is allowed to run programs as root through
sudo, but sudo is not a historical Unix tool and is not bundled with SVR4. The traditional way to become root is with the
su command, and that requires knowing the root password.
Accounts do belong to one or more groups, which can indirectly confer privileges, but that's more varied than having “administrator users”. I remember systems where the
adm group gives the permission to read system log files (it's even the case in some recent Linux distributions); but that's only one thing among many. In some Unix variants (I don't know about SVR4), running
su has an additional prerequisite, that the user must belong to the
In any case, you don't need any special permission to create a subdirectory in your home directory. It's possible that the
adduser command on SVR4 doesn't create the new user's home directory, or requires an option to do so; the syntax of
useradd is not standardized, so check the man page on your system.
To create an account, use
useradd. If you need to create the user's home directory by hand, you can use these commands (as root of course):
chown bob /home/bob
chgrp users /home/bob # or whatever bob's primary group is
chmod 755 /home/bob
To create an administrator user, create a user, and give the person who'll be using the account the root password. If required, add the user to the
wheel group (either with built-in tools, if provided on your Unix variant, or by editing the
/etc/group file manually).