The useradd and userdel functions found in /usr/sbin
3 Mb. Disk Storage
Root Authority (to install)
CGI Executable capability (ExecCGI). ComBase is installed as a CGI (Common Gateway Interface) program that receives control from a web server. This assumes that your server has the ability to invoke CGI programs.
Recommended, but not Mandatory:
PAM (Pluggable Authentication Modules)
RedHat Linux 7.2 or SuSE Linux 7.3
The shadow password suite, which enhances security because the password file does not contain encrypted passwords; they are stored in a separate shadow file that is readable only by root.