69 lines
3.3 KiB
HTML
69 lines
3.3 KiB
HTML
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<!Converted with LaTeX2HTML 95.1 (Fri Jan 20 1995) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds >
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<HEAD>
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<TITLE>3.9.4 Changing permissions</TITLE>
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<meta name="description" value="3.9.4 Changing permissions">
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<BR> <HR><A NAME=tex2html3374 HREF="node129.html"><IMG ALIGN=BOTTOM ALT="next" SRC="next_motif.gif"></A> <A NAME=tex2html3372 HREF="node124.html"><IMG ALIGN=BOTTOM ALT="up" SRC="up_motif.gif"></A> <A NAME=tex2html3368 HREF="node127.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="previous_motif.gif"></A> <A NAME=tex2html3376 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="contents_motif.gif"></A> <A NAME=tex2html3377 HREF="node250.html"><IMG ALIGN=BOTTOM ALT="index" SRC="index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html3375 HREF="node129.html">3.10 Managing file links</A>
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<B>Up:</B> <A NAME=tex2html3373 HREF="node124.html">3.9 File Permissions</A>
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<B> Previous:</B> <A NAME=tex2html3369 HREF="node127.html">3.9.3 Dependencies</A>
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<BR> <HR> <P>
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<H2><A NAME=SECTION00594000000000000000>3.9.4 Changing permissions</A></H2>
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<P>
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<A NAME=3251> </A>
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<A NAME=3252> </A>
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<A NAME=3253> </A>
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<A NAME=3288> </A>
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The command <tt>chmod</tt> is used to set the permissions on a file. Only
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the owner of a file may change the permissions on that file.
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The syntax of <tt>chmod</tt> is:
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<P><TT> chmod {a,u,g,o}{+,-}{r,w,x} <IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img189.gif"> <P></TT>
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<P>
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Briefly, you supply one or more of
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<b>a</b>ll, <b>u</b>ser, <b>g</b>roup, or <b>o</b>ther. Then you specify
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whether you are adding rights (<tt>+</tt>) or taking them away (<tt>-</tt>).
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Finally, you specify one or more of
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<b>r</b>ead, <b>w</b>rite, and e<b>x</b>ecute. Some examples of legal
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commands are:
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<P>
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<DL COMPACT><DT><tt>chmod a+r stuff</tt>
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<DD>
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Gives all users read access to the file.
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<DT><tt>chmod +r stuff</tt>
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<DD>
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Same as above---if none of <tt>a</tt>, <tt>u</tt>, <tt>g</tt>, or <tt>o</tt> is
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specified, <tt>a</tt> is assumed.
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<DT><tt>chmod og-x stuff</tt>
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<DD>
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Remove execute permission from users other than the owner.
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<DT><tt>chmod u+rwx stuff</tt>
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<DD>
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Allow the owner of the file to read, write, and execute the file.
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<DT><tt>chmod o-rwx stuff</tt>
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<DD>
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Remove read, write, and execute permission from users other than the
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owner and users in the file's group.
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<P>
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</DL>
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<P>
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<A NAME=3281> </A>
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<A NAME=3282> </A>
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<P>
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<BR> <HR><A NAME=tex2html3374 HREF="node129.html"><IMG ALIGN=BOTTOM ALT="next" SRC="next_motif.gif"></A> <A NAME=tex2html3372 HREF="node124.html"><IMG ALIGN=BOTTOM ALT="up" SRC="up_motif.gif"></A> <A NAME=tex2html3368 HREF="node127.html"><IMG ALIGN=BOTTOM ALT="previous" SRC="previous_motif.gif"></A> <A NAME=tex2html3376 HREF="node1.html"><IMG ALIGN=BOTTOM ALT="contents" SRC="contents_motif.gif"></A> <A NAME=tex2html3377 HREF="node250.html"><IMG ALIGN=BOTTOM ALT="index" SRC="index_motif.gif"></A> <BR>
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<B> Next:</B> <A NAME=tex2html3375 HREF="node129.html">3.10 Managing file links</A>
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<B>Up:</B> <A NAME=tex2html3373 HREF="node124.html">3.9 File Permissions</A>
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<B> Previous:</B> <A NAME=tex2html3369 HREF="node127.html">3.9.3 Dependencies</A>
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<BR> <HR> <P>
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<BR> <HR>
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<P><ADDRESS>
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<I>Matt Welsh <BR>
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mdw@sunsite.unc.edu</I>
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</ADDRESS>
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</BODY>
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