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<HTML><!--Distributed by F --><HEAD><TITLE>[Chapter 3] Logging Out</TITLE><METANAME="DC.title"CONTENT="UNIX Power Tools"><METANAME="DC.creator"CONTENT="Jerry Peek, Tim O'Reilly & Mike Loukides"><METANAME="DC.publisher"CONTENT="O'Reilly & Associates, Inc."><METANAME="DC.date"CONTENT="1998-08-04T21:32:29Z"><METANAME="DC.type"CONTENT="Text.Monograph"><METANAME="DC.format"CONTENT="text/html"SCHEME="MIME"><METANAME="DC.source"CONTENT="1-56592-260-3"SCHEME="ISBN"><METANAME="DC.language"CONTENT="en-US"><METANAME="generator"CONTENT="Jade 1.1/O'Reilly DocBook 3.0 to HTML 4.0"><LINKREV="made"HREF="mailto:online-books@oreilly.com"TITLE="Online Books Comments"><LINKREL="up"HREF="part01.htm"TITLE="I. Making Yourself at Home "><LINKREL="prev"HREF="ch02_16.htm"TITLE="2.16 Approved Shells: Using Unapproved Login Shell "><LINKREL="next"HREF="ch03_02.htm"TITLE="3.2 Running Commands at Bourne/Korn Shell Logout "></HEAD><BODYBGCOLOR="#FFFFFF"TEXT="#000000"><DIVCLASS="htmlnav"><H1><IMGSRC="gifs/smbanner.gif"ALT="UNIX Power Tools"USEMAP="#srchmap"BORDER="0"></H1><MAPNAME="srchmap"><AREASHAPE="RECT"COORDS="0,0,466,58"HREF="index.htm"ALT="UNIX Power Tools"><AREASHAPE="RECT"COORDS="467,0,514,18"HREF="jobjects/fsearch.htm"ALT="Search this book"></MAP><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch02_16.htm"TITLE="2.16 Approved Shells: Using Unapproved Login Shell "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 2.16 Approved Shells: Using Unapproved Login Shell "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Chapter 3</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch03_02.htm"TITLE="3.2 Running Commands at Bourne/Korn Shell Logout "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 3.2 Running Commands at Bourne/Korn Shell Logout "BORDER="0"></A></TD></TR></TABLE> <HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="CHAPTER"><H1CLASS="chapter"><ACLASS="title"NAME="UPT-CHP-3">3. Logging Out</A></H1><DIVCLASS="htmltoc"><P><B>Contents:</B><BR><ACLASS="sect1"HREF="#UPT-ART-4800"TITLE="3.1 Running Commands When You Log Out ">Running Commands When You Log Out </A><BR><ACLASS="sect1"HREF="ch03_02.htm"TITLE="3.2 Running Commands at Bourne/Korn Shell Logout ">Running Commands at Bourne/Korn Shell Logout </A><BR><ACLASS="sect1"HREF="ch03_03.htm"TITLE="3.3 Electronic Fortune Cookies ">Electronic Fortune Cookies </A><BR><ACLASS="sect1"HREF="ch03_04.htm"TITLE="3.4 Automatic File Cleanup ">Automatic File Cleanup </A><BR><ACLASS="sect1"HREF="ch03_05.htm"TITLE="3.5 Stop Accidental C Shell Logouts ">Stop Accidental C Shell Logouts </A><BR><ACLASS="sect1"HREF="ch03_06.htm"TITLE="3.6 Stop Accidental Bourne Shell Logouts ">Stop Accidental Bourne Shell Logouts </A><BR><ACLASS="sect1"HREF="ch03_07.htm"TITLE="3.7 Detaching a Session with screen ">Detaching a Session with screen </A><BR><ACLASS="sect1"HREF="ch03_08.htm"TITLE="3.8 What tty Am I On? ">What tty Am I On? </A></P><P></P></DIV><DIVCLASS="sect1"><H2CLASS="sect1"><ACLASS="title"NAME="UPT-ART-4800">3.1 Running Commands When You Log Out </A></H2><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-3964"></A><ACLASS="indexterm"NAME="AUTOID-3967"></A><ACLASS="indexterm"NAME="AUTOID-3969"></A>Is there something you want to do every time you log out: run a programthat deletes temporary files, asks you a question, orprints a fortune to your screen?If you use the C shell, make a file named<SPANCLASS="link"><EMCLASS="emphasis">.logout</EM> (<ACLASS="linkend"HREF="ch02_02.htm"TITLE="Shell Setup Files-Which, Where, and Why ">2.2</A>)</SPAN>in your home directory and put the commands there.Before a login C shell exits, it'll read that file.But not all shells are login C shells; you might want these shells to readyour logout-type file, too.Articles <ACLASS="xref"HREF="ch02_07.htm"TITLE="C Shell Setup Files Aren't Read When You Want Them to Be? ">2.7</A>and <ACLASS="xref"HREF="ch02_08.htm"TITLE="Identifying Login Shells ">2.8</A>have some suggestions.</P><PCLASS="para">Some ideas for your <EMCLASS="emphasis">.logout</EM> are:</P><ULCLASS="itemizedlist"><LICLASS="listitem"><PCLASS="para">A command like<SPANCLASS="link"><EMCLASS="emphasis">fortune</EM> (<ACLASS="linkend"HREF="ch03_03.htm"TITLE="Electronic Fortune Cookies ">3.3</A>)</SPAN>to give yousomething fun to think about when you log out.</P></LI><LICLASS="listitem"><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-3985"></A><ACLASS="indexterm"NAME="AUTOID-3988"></A>A background command to clean up temporary files, as in article <ACLASS="xref"HREF="ch03_04.htm"TITLE="Automatic File Cleanup ">3.4</A>.</P></LI><LICLASS="listitem"><PCLASS="para">A command to list a "reminder" file - for example, work to take home.</P></LI><LICLASS="listitem"><PCLASS="para">A script that prompts you for the hours you've worked on projectsso you can make a timesheet later.</P></LI><LICLASS="listitem"><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-3997"></A>The command<SPANCLASS="link"><EMCLASS="emphasis">clear</EM> (<ACLASS="linkend"HREF="ch22_18.htm"TITLE="Clear Your Terminal for Security, to Stop Burn-in ">22.18</A>)</SPAN>to erase your screen.This keeps the next user from reading what you did.[1]It also helps to stop "burn-in" damage to terminals caused by charactersleft over from your login session.(Some UNIXes clear the screen before printing the <CODECLASS="literal">login:</CODE> prompt.Of course, this won't help users who connect with a<SPANCLASS="link">data switch (<ACLASS="linkend"HREF="glossary.htm#UPT-ART-1010"TITLE="Glossary">52.9</A>)</SPAN>or portmanager because the connection will be broken before the next login prompt.)</P><BLOCKQUOTECLASS="footnote"><PCLASS="para">[1] Some terminals and windows have "scroll back" memory of previous screens.<EMCLASS="emphasis">clear</EM> usually doesn't erase all of that.</P></BLOCKQUOTE></LI></UL><PCLASS="para">If you connect to this host over a network, with a slowmodem or on a data switch - and you don't see all the <EMCLASS="emphasis">.logout</EM> commandsrun before your connectioncloses - try putting the command<SPANCLASS="link"><CODECLASS="literal">sleep 2</CODE> (<ACLASS="linkend"HREF="ch40_02.htm"TITLE="Waiting a Little While: sleep ">40.2</A>)</SPAN><ACLASS="indexterm"NAME="AUTOID-4010"></A>at the end of the file.That makes the shell wait two seconds before it exits, which givesoutput more time to get to your screen.</P><DIVCLASS="sect1info"><PCLASS="SECT1INFO">- <SPANCLASS="authorinitials">JP</SPAN></P></DIV></DIV></DIV><DIVCLASS="htmlnav"><P></P><HRALIGN="LEFT"WIDTH="515"TITLE="footer"><TABLEWIDTH="515"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch02_16.htm"TITLE="2.16 Approved Shells: Using Unapproved Login Shell "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 2.16 Approved Shells: Using Unapproved Login Shell "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><ACLASS="book"HREF="index.htm"TITLE="UNIX Power Tools"><IMGSRC="gifs/txthome.gif"SRC="gifs/txthome.gif"ALT="UNIX Power Tools"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch03_02.htm"TITLE="3.2 Running Commands at Bourne/Korn Shell Logout "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 3.2 Running Commands at Bourne/Korn Shell Logout "BORDER="0"></A></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172">2.16 Approved Shells: Using Unapproved Login Shell </TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><ACLASS="index"HREF="index/idx_0.htm"TITLE="Book Index"><IMGSRC="gifs/index.gif"SRC="gifs/index.gif"ALT="Book Index"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172">3.2 Running Commands at Bourne/Korn Shell Logout </TD></TR></TABLE><HRALIGN="LEFT"WIDTH="515"TITLE="footer"><IMGSRC="gifs/smnavbar.gif"SRC="gifs/smnavbar.gif"USEMAP="#map"BORDER="0"ALT="The UNIX CD Bookshelf Navigation"><MAPNAME="map"><AREASHAPE="RECT"COORDS="0,0,73,21"HREF="../index.htm"ALT="The UNIX CD Bookshelf"><AREASHAPE="RECT"COORDS="74,0,163,21"HREF="index.htm"ALT="UNIX Power Tools"><AREASHAPE="RECT"COORDS="164,0,257,21"HREF="../unixnut/index.htm"ALT="UNIX in a Nutshell"><AREASHAPE="RECT"COORDS="258,0,321,21"HREF="../vi/index.htm"ALT="Learning the vi Editor"><AREASHAPE="RECT"COORDS="322,0,378,21"HREF="../sedawk/index.htm"ALT="sed & awk"><AREASHAPE="RECT"COORDS="379,0,438,21"HREF="../ksh/index.htm"ALT="Learning the Korn Shell"><AREASHAPE="RECT"COORDS="439,0,514,21"HREF="../lrnunix/index.htm"ALT="Learning the UNIX Operating System"></MAP></DIV></BODY></HTML>⌨️ 快捷键说明
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