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>List of Terms</A
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><DT
><A
NAME="DEF-DIGEST"
><B
>digest</B
></A
></DT
><DD
><P
>a collection of new messages mailed to the members of an archived list as one message. A list is called digested when it is archived and, periodically, a digest is sent out.</P
></DD
><DT
><A
NAME="DEF-GID"
><B
>Group ID</B
></A
></DT
> (GID)<DD
><P
>an identification number assigned to files, directories, and processes to restrict access--similar to UID except multiple people can be a member of a group. On Unix-type systems, groups can be set up (defined in the <TT
CLASS="FILENAME"
>/etc/group</TT
> file). When a user name is a member of a group, she can access files created with that GID (assuming permissions allow it).</P
></DD
><DT
><A
NAME="DEF-MTA"
><B
>Mail Transfer Agent</B
></A
></DT
> (MTA)<DD
><P
>a program, such as Sendmail, responsible for passing mail from one location to another.</P
></DD
><DT
><A
NAME="DEF-SGID"
><B
>Set Group ID</B
></A
></DT
> (SGID)<DD
><P
>a file attribute which allows a program to run with specific group privileges no matter who executes it.</P
></DD
><DT
><A
NAME="DEF-SMRSH"
><B
><B
CLASS="COMMAND"
>smrsh</B
></B
></A
></DT
><DD
><P
>(SendMail Restricted SHell) the shell that Sendmail uses to execute programs. <B
CLASS="COMMAND"
>smrsh</B
> puts restrictions on the programs that can be run to make it safer than using a regular shell such as the Bourne Shell.</P
></DD
><DT
><A
NAME="DEF-SUID"
><B
>Set User ID</B
></A
></DT
> (SUID)<DD
><P
>a file attribute which allows a program to run as a specific user no matter who executes it.</P
></DD
><DT
><A
NAME="DEF-UID"
><B
>User ID</B
></A
></DT
> (UID)<DD
><P
>an identification number assigned to files directories, and processes--similar to GID except every user has a unique UID. Every process must run under a UID (the one-to-one relationship between the UID and user name is defined in <TT
CLASS="FILENAME"
>/etc/passwd</TT
>). The process' UID determines what the program can access. In general a regular user can change the permissions on files that she owns unless the UID is 0 (the <TT
CLASS="LITERAL"
>root</TT
> user). In that case, <TT
CLASS="LITERAL"
>root</TT
> can modify any files on the system.</P
></DD
><DT
><A
NAME="DEF-WRAPPER"
><B
>wrapper</B
></A
></DT
><DD
><P
>a program used to start another program; usually a wrapper is SUID or SGID so it can bestow privileges onto another program that the other program would not normally have.</P
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