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<HTML><!--Distributed by F --><HEAD><TITLE>[Preface] Typefaces and Other Conventions </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="1998-10-23T15:23:41Z"><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="prf1_01.htm"TITLE="Preface"><LINKREL="prev"HREF="prf1_08.htm"TITLE="What's New in the Second Edition "><LINKREL="next"HREF="prf1_10.htm"TITLE="The Authors "></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="prf1_08.htm"TITLE="What's New in the Second Edition "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: What's New in the Second Edition "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Preface</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="prf1_10.htm"TITLE="The Authors "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: The Authors "BORDER="0"></A></TD></TR></TABLE> <HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="SECT1"><H2CLASS="sect1"><ACLASS="title"NAME="UPT-CHP-0-9">Typefaces and Other Conventions </A></H2><PCLASS="para"></P><DLCLASS="variablelist"><DTCLASS="term"><EMCLASS="emphasis">Italic</EM></DT><DDCLASS="listitem"><PCLASS="para">is used for the names of all UNIX utilities, switches, directories, and filenames and to emphasize new terms and concepts when they are first introduced.It's also used in programs and examples to explain what'shappening or what's been left out at the <CODECLASS="literal">...</CODE> marks.</P></DD><DTCLASS="term"><BCLASS="emphasis.bold">Bold</B></DT><DDCLASS="listitem"><PCLASS="para">is used occasionally within text to make words easy to find-justlike movie stars' names in the People section of your local newspaper.</P></DD><DTCLASS="term"><CODECLASS="literal">Constant</CODE></DT><DDCLASS="listitem"><PCLASS="para"></P></DD><DTCLASS="term"><CODECLASS="literal">Width</CODE></DT><DDCLASS="listitem"><PCLASS="para">is used for sample code fragments and examples. A reference in text to a word or item used in an example or code fragment is also shown in constant width font.</P></DD><DTCLASS="term"><CODECLASS="userinput"><B>Constant</B></CODE></DT><DDCLASS="listitem"><PCLASS="para"></P></DD><DTCLASS="term"><CODECLASS="userinput"><B>Bold</B></CODE></DT><DDCLASS="listitem"><PCLASS="para">is used in examples to show commands or text that would be typed in literally by the user.</P></DD><DTCLASS="term"><CODECLASS="replaceable"><I>Constant</I></CODE></DT><DDCLASS="listitem"><PCLASS="para"></P></DD><DTCLASS="term"><CODECLASS="replaceable"><I>Italic</I></CODE>,</DT><DDCLASS="listitem"><PCLASS="para"></P></DD><DTCLASS="term"><CODECLASS="replaceable"><I>Bold</I></CODE></DT><DDCLASS="listitem"><PCLASS="para"></P></DD><DTCLASS="term"><CODECLASS="replaceable"><I>Italic</I></CODE></DT><DDCLASS="listitem"><PCLASS="para">are used in code fragments and examples to show variables for which a context-specific substitution should be made. (The variable<CODECLASS="replaceable"><I>filename</I></CODE>, for example, would be replaced by some actual filename.)</P></DD><DTCLASS="term"><EMCLASS="emphasis">function</EM>(n)</DT><DDCLASS="listitem"><PCLASS="para">is a reference to a manual page in Section <EMCLASS="emphasis">n</EM> of theUNIX programmer's manual.For example, <EMCLASS="emphasis">getopt</EM>(3) refers to a page called <EMCLASS="emphasis">getopt</EM> in Section 3.</P></DD><DTCLASS="term"><CODECLASS="literal">%</CODE></DT><DDCLASS="listitem"><PCLASS="para">is the C shell prompt.</P></DD><DTCLASS="term"><CODECLASS="literal">$</CODE></DT><DDCLASS="listitem"><PCLASS="para">is the Bourne shell prompt.</P></DD><DTCLASS="term"><CODECLASS="literal">:-)</CODE></DT><DDCLASS="listitem"><PCLASS="para">is a "smiley face" that means "don't take this seriously."The idea started on<SPANCLASS="link">Usenet (<ACLASS="linkend"HREF="ch01_33.htm"TITLE="UNIX Networking and Communications ">1.33</A>)</SPAN>and<SPANCLASS="link">it spread (<ACLASS="linkend"HREF="ch51_12.htm"TITLE="You Don't Have Enough Smileys? ">51.12</A>)</SPAN>.</P></DD><DTCLASS="term">&<CODECLASS="literal">...</CODE></DT><DDCLASS="listitem"><PCLASS="para">stands for text (usually computer output) that's beenomitted for clarity or to save space.</P></DD><DTCLASS="term">CTRL</DT><DDCLASS="listitem"><PCLASS="para">starts a control character.To createCTRL-d, for example, hold down the"control" key and press the"d" key. Control characters are not case sensitive;"d" refers to both the uppercase and lowercase letter. The notation <CODECLASS="literal">^D</CODE> also means CTRL-d.Also, you'll sometimes see the key sequence in a box(for example,<KBDCLASS="keycap">[CTRL-d]</KBD>when we want to make it clear exactly what you should type. </P></DD><DTCLASS="term"><IMGSRC="../chars/squ.gif"ALT=" "></DT><DDCLASS="listitem"><PCLASS="para">is used in some examples to represent a space character.</P></DD><DTCLASS="term"><CODECLASS="replaceable"><I>TAB</I></CODE></DT><DDCLASS="listitem"><PCLASS="para">is used in some examples to represent a TAB character.</P></DD></DL></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="prf1_08.htm"TITLE="What's New in the Second Edition "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: What's New in the Second Edition "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="prf1_10.htm"TITLE="The Authors "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: The Authors "BORDER="0"></A></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172">What's New in the Second Edition </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">The Authors </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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