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>10.6. Shell startup</H1
><P
> When an interactive login shell starts, it automatically
executes one or more pre-defined files. Different shells execute
different files; see the documentation of each shell for further
information. </P
><P
> Most shells first run some global file, for example, the
Bourne shell (<B
CLASS="COMMAND"
>/bin/sh</B
>) and its derivatives
execute <TT
CLASS="FILENAME"
>/etc/profile</TT
>; in addition,
they execute <TT
CLASS="FILENAME"
>.profile</TT
> in the user's
home directory. <TT
CLASS="FILENAME"
>/etc/profile</TT
> allows the
system administrator to have set up a common user environment,
especially by setting the <TT
CLASS="ENVAR"
>PATH</TT
> to include local
command directories in addition to the normal ones. On the other
hand, <TT
CLASS="FILENAME"
>.profile</TT
> allows the user to customize
the environment to his own tastes by overriding, if necessary,
the default environment. </P
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