192 lines
3.0 KiB
HTML
192 lines
3.0 KiB
HTML
|
<HTML
|
||
|
><HEAD
|
||
|
><TITLE
|
||
|
>Counting Files in the Current Directory</TITLE
|
||
|
><META
|
||
|
NAME="GENERATOR"
|
||
|
CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
|
||
|
REL="HOME"
|
||
|
TITLE="Bash Prompt HOWTO"
|
||
|
HREF="index.html"><LINK
|
||
|
REL="UP"
|
||
|
TITLE="Prompt Code Snippets"
|
||
|
HREF="c679.html"><LINK
|
||
|
REL="PREVIOUS"
|
||
|
TITLE="Date and Time"
|
||
|
HREF="x690.html"><LINK
|
||
|
REL="NEXT"
|
||
|
TITLE="Total Bytes in the Current Directory"
|
||
|
HREF="x711.html"></HEAD
|
||
|
><BODY
|
||
|
CLASS="SECT1"
|
||
|
BGCOLOR="#FFFFFF"
|
||
|
TEXT="#000000"
|
||
|
LINK="#0000FF"
|
||
|
VLINK="#840084"
|
||
|
ALINK="#0000FF"
|
||
|
><DIV
|
||
|
CLASS="NAVHEADER"
|
||
|
><TABLE
|
||
|
SUMMARY="Header navigation table"
|
||
|
WIDTH="100%"
|
||
|
BORDER="0"
|
||
|
CELLPADDING="0"
|
||
|
CELLSPACING="0"
|
||
|
><TR
|
||
|
><TH
|
||
|
COLSPAN="3"
|
||
|
ALIGN="center"
|
||
|
>Bash Prompt HOWTO: </TH
|
||
|
></TR
|
||
|
><TR
|
||
|
><TD
|
||
|
WIDTH="10%"
|
||
|
ALIGN="left"
|
||
|
VALIGN="bottom"
|
||
|
><A
|
||
|
HREF="x690.html"
|
||
|
ACCESSKEY="P"
|
||
|
>Prev</A
|
||
|
></TD
|
||
|
><TD
|
||
|
WIDTH="80%"
|
||
|
ALIGN="center"
|
||
|
VALIGN="bottom"
|
||
|
>Chapter 11. Prompt Code Snippets</TD
|
||
|
><TD
|
||
|
WIDTH="10%"
|
||
|
ALIGN="right"
|
||
|
VALIGN="bottom"
|
||
|
><A
|
||
|
HREF="x711.html"
|
||
|
ACCESSKEY="N"
|
||
|
>Next</A
|
||
|
></TD
|
||
|
></TR
|
||
|
></TABLE
|
||
|
><HR
|
||
|
ALIGN="LEFT"
|
||
|
WIDTH="100%"></DIV
|
||
|
><DIV
|
||
|
CLASS="SECT1"
|
||
|
><H1
|
||
|
CLASS="SECT1"
|
||
|
><A
|
||
|
NAME="AEN700"
|
||
|
></A
|
||
|
>11.3. Counting Files in the Current Directory</H1
|
||
|
><P
|
||
|
>To determine how many files there are in the current directory, put in
|
||
|
<TT
|
||
|
CLASS="USERINPUT"
|
||
|
><B
|
||
|
>ls -1 | wc -l</B
|
||
|
></TT
|
||
|
>. This uses <TT
|
||
|
CLASS="USERINPUT"
|
||
|
><B
|
||
|
>wc</B
|
||
|
></TT
|
||
|
>
|
||
|
to do a count of the number of lines (-l) in the output of
|
||
|
<TT
|
||
|
CLASS="USERINPUT"
|
||
|
><B
|
||
|
>ls -1</B
|
||
|
></TT
|
||
|
>. It doesn't count dotfiles. Please note that
|
||
|
<TT
|
||
|
CLASS="USERINPUT"
|
||
|
><B
|
||
|
>ls -l</B
|
||
|
></TT
|
||
|
> (that's an "L" rather than a "1" as in the
|
||
|
previous examples) which I used in previous versions of this HOWTO will
|
||
|
actually give you a file count one greater than the actual count. Thanks
|
||
|
to Kam Nejad for this point. </P
|
||
|
><P
|
||
|
>If you want to count only files and NOT include symbolic links (just an
|
||
|
example of what else you could do), you could use <TT
|
||
|
CLASS="USERINPUT"
|
||
|
><B
|
||
|
>ls -l | grep
|
||
|
-v ^l | wc -l</B
|
||
|
></TT
|
||
|
> (that's an "L" not a "1" this time, we want a
|
||
|
"long" listing here). <TT
|
||
|
CLASS="USERINPUT"
|
||
|
><B
|
||
|
>grep</B
|
||
|
></TT
|
||
|
> checks for any line
|
||
|
beginning with "l" (indicating a link), and discards that line (-v). </P
|
||
|
><P
|
||
|
>Relative speed: "ls -1 /usr/bin/ | wc -l" takes about 1.03 seconds on an
|
||
|
unloaded 486SX25 (/usr/bin/ on this machine has 355 files). "ls -l
|
||
|
/usr/bin/ | grep -v ^l | wc -l" takes about 1.19 seconds. </P
|
||
|
></DIV
|
||
|
><DIV
|
||
|
CLASS="NAVFOOTER"
|
||
|
><HR
|
||
|
ALIGN="LEFT"
|
||
|
WIDTH="100%"><TABLE
|
||
|
SUMMARY="Footer navigation table"
|
||
|
WIDTH="100%"
|
||
|
BORDER="0"
|
||
|
CELLPADDING="0"
|
||
|
CELLSPACING="0"
|
||
|
><TR
|
||
|
><TD
|
||
|
WIDTH="33%"
|
||
|
ALIGN="left"
|
||
|
VALIGN="top"
|
||
|
><A
|
||
|
HREF="x690.html"
|
||
|
ACCESSKEY="P"
|
||
|
>Prev</A
|
||
|
></TD
|
||
|
><TD
|
||
|
WIDTH="34%"
|
||
|
ALIGN="center"
|
||
|
VALIGN="top"
|
||
|
><A
|
||
|
HREF="index.html"
|
||
|
ACCESSKEY="H"
|
||
|
>Home</A
|
||
|
></TD
|
||
|
><TD
|
||
|
WIDTH="33%"
|
||
|
ALIGN="right"
|
||
|
VALIGN="top"
|
||
|
><A
|
||
|
HREF="x711.html"
|
||
|
ACCESSKEY="N"
|
||
|
>Next</A
|
||
|
></TD
|
||
|
></TR
|
||
|
><TR
|
||
|
><TD
|
||
|
WIDTH="33%"
|
||
|
ALIGN="left"
|
||
|
VALIGN="top"
|
||
|
>Date and Time</TD
|
||
|
><TD
|
||
|
WIDTH="34%"
|
||
|
ALIGN="center"
|
||
|
VALIGN="top"
|
||
|
><A
|
||
|
HREF="c679.html"
|
||
|
ACCESSKEY="U"
|
||
|
>Up</A
|
||
|
></TD
|
||
|
><TD
|
||
|
WIDTH="33%"
|
||
|
ALIGN="right"
|
||
|
VALIGN="top"
|
||
|
>Total Bytes in the Current Directory</TD
|
||
|
></TR
|
||
|
></TABLE
|
||
|
></DIV
|
||
|
></BODY
|
||
|
></HTML
|
||
|
>
|