Administration Tool

Administration Tool is a system administration utility with a graphical interface that enables administrators to maintain system database files, printers, serial ports, user accounts, and hosts.

Anonymous FTP

An anonymous File Transfer Protocol (FTP) is a site that is set up for general use and does not require an account to obtain files. The word "anonymous" is the user name and the user's email address is the password.

Argument

An argument is used to specify how and on what the preceding command is to be performed.

at

The at command executes specified commands (read from standard input) at a later time that you specify. Standard output and standard error output are mailed to the user unless they are redirected elsewhere. The shell environment variables, current directory, unmask value, and ulimit value are retained when the commands are executed. The SHELL environment variable determines which shell to use.