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<HTML><!--Distributed by F --><HEAD><TITLE>[Chapter 17] 17.14 Searching for Files by Size </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="1998-08-04T21:38:29Z"><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="ch17_01.htm"TITLE="17. Finding Files with find"><LINKREL="prev"HREF="ch17_13.htm"TITLE="17.13 Searching for Files by Type "><LINKREL="next"HREF="ch17_15.htm"TITLE="17.15 Searching for Files by Permission "></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="ch17_13.htm"TITLE="17.13 Searching for Files by Type "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 17.13 Searching for Files by Type "BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="171"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1">Chapter 17<BR>Finding Files with find</FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="172"><ACLASS="SECT1"HREF="ch17_15.htm"TITLE="17.15 Searching for Files by Permission "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 17.15 Searching for Files by Permission "BORDER="0"></A></TD></TR></TABLE> <HRALIGN="LEFT"WIDTH="515"TITLE="footer"></DIV><DIVCLASS="SECT1"><H2CLASS="sect1"><ACLASS="title"NAME="UPT-ART-7937">17.14 Searching for Files by Size </A></H2><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-19157"></A><ACLASS="indexterm"NAME="AUTOID-19160"></A><ACLASS="indexterm"NAME="AUTOID-19163"></A><ACLASS="indexterm"NAME="AUTOID-19167"></A><EMCLASS="emphasis">find</EM>has several operators that take a decimal integer. One such argument is<EMCLASS="emphasis">-size</EM>.The number after this argument is the size of the files in disk blocks.Unfortunately, this is a vague number.Earlier versions of UNIX used disk blocks of 512 bytes. Newer versions allowlarger block sizes, so a"block"of 512 bytes is misleading.</P><PCLASS="para"><ACLASS="indexterm"NAME="AUTOID-19173"></A>This confusion is aggravated when the command<EMCLASS="emphasis">ls -s</EM>is used. The<EMCLASS="emphasis">-s</EM>option supposedly lists the size of the file in blocks.But if your system has a different block size than <EMCLASS="emphasis">ls -s</EM> has beenprogrammed to assume, it can give a misleading answer.You can put a<CODECLASS="literal">c</CODE>after the number, and specify the size in bytes.To find a file with exactly 1234 bytes (as in an <EMCLASS="emphasis">ls -l</EM> listing), type:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">% <CODECLASS="userinput"><B>find . -size 1234c -print</B></CODE></PRE></BLOCKQUOTE></P><PCLASS="para">To search for files using a range of file sizes, a minus or plus sign can bespecified before the number.The minus sign (<CODECLASS="literal">-</CODE>) meansless than,and the plus sign (<CODECLASS="literal">+</CODE>) meansgreater than.This next example lists all files that are greater than 10,000 bytes,but less than 32,000 bytes:</P><PCLASS="para"><BLOCKQUOTECLASS="screen"><PRECLASS="screen">% <CODECLASS="userinput"><B>find . -size +10000c -size -32000c -print</B></CODE></PRE></BLOCKQUOTE></P><PCLASS="para">When more than one qualifier is given,<SPANCLASS="link">both must be true (<ACLASS="linkend"HREF="ch17_06.htm"TITLE="Be an Expert on find Search Operators ">17.6</A>)</SPAN>.</P><DIVCLASS="sect1info"><PCLASS="SECT1INFO">- <SPANCLASS="authorinitials">BB</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="ch17_13.htm"TITLE="17.13 Searching for Files by Type "><IMGSRC="gifs/txtpreva.gif"SRC="gifs/txtpreva.gif"ALT="Previous: 17.13 Searching for Files by Type "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="ch17_15.htm"TITLE="17.15 Searching for Files by Permission "><IMGSRC="gifs/txtnexta.gif"SRC="gifs/txtnexta.gif"ALT="Next: 17.15 Searching for Files by Permission "BORDER="0"></A></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="172">17.13 Searching for Files by Type </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">17.15 Searching for Files by Permission </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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