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<HTML><!--Distributed by F --><HEAD><TITLE>[Chapter 4] 4.6 Naming Files </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="1998-08-04T21:32:43Z"><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="ch04_01.htm"TITLE="4. Organizing Your Home Directory"><LINKREL="prev"HREF="ch04_05.htm"TITLE="4.5 Private (Personal) Directories "><LINKREL="next"HREF="ch04_07.htm"TITLE="4.7 Make More Directories! "></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="ch04_05.htm"TITLE="4.5 Private (Personal) Directories "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 4.5 Private (Personal) Directories "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Chapter 4<BR>Organizing Your Home Directory</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch04_07.htm"TITLE="4.7 Make More Directories! "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 4.7 Make More Directories! "BORDER="0"></A></TD></TR></TABLE> <HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="SECT1"><H2CLASS="sect1"><ACLASS="title"NAME="UPT-ART-1054">4.6 Naming Files </A></H2><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-4450"></A><ACLASS="indexterm"NAME="AUTOID-4453"></A>Let's think about a filing cabinet again. If the files in yourfiling cabinet were called <EMCLASS="emphasis">letter1</EM>, <EMCLASS="emphasis">letter2,</EM><EMCLASS="emphasis">letter3,</EM> and so on,you'd never be able to find anything.</P><PCLASS="para">The same is true on your computer. You should come up with adescriptive name for each file to create. UNIX systems let you havevery long filenames. A few systems have a 14-character limit,but most allow names that are 256 characters long - certainly longerthan you will ever need.</P><PCLASS="para">I can't tell you how to make a filename descriptive, except tosuggest that rather than using names like <EMCLASS="emphasis">letter</EM>, you make a filenamethat describes what the letter is about. In the case of a letter,using the recipient's name may help - assuming that you can easily makea connection between <EMCLASS="emphasis">john_shmoe</EM> and "that's the letter about trendsin gold prices" (though I'd suggest that the name<EMCLASS="emphasis">gold_price_trends_oct</EM> is an even better name than <EMCLASS="emphasis">john_shmoe</EM>). Bruce Barnett has suggested that, by using long filenames, youcan create a simple "relational database." For example, you couldfind out everything you've recorded about the price of gold with acommand like <CODECLASS="literal">more *gold*price*</CODE>.Of course, this doesn'tprovide the fancy features that a commercial database would have - butyou may not need those features and, if so, why spend good money tobuy them?</P><PCLASS="para">Similarly, if you're a programmer, the name of each file in yourprogram should describe what the code does. Ifthe code diagonalizes matrices, the file should be called somethinglike <EMCLASS="emphasis">diag_mat.c</EM>. If the code reads input from bank tellers, itshould be called something like <EMCLASS="emphasis">teller_input.c</EM>.</P><PCLASS="para">Another way to distinguish between different kinds of files is byusing suffixes or<ACLASS="indexterm"NAME="AUTOID-4470"></A><ACLASS="indexterm"NAME="AUTOID-4473"></A><SPANCLASS="link">filename extensions (<ACLASS="linkend"HREF="ch01_17.htm"TITLE="Filename Extensions ">1.17</A>)</SPAN>.</P><DIVCLASS="sect1info"><PCLASS="SECT1INFO">- <SPANCLASS="authorinitials">ML</SPAN></P></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="ch04_05.htm"TITLE="4.5 Private (Personal) Directories "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 4.5 Private (Personal) Directories "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="ch04_07.htm"TITLE="4.7 Make More Directories! 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