diff options
Diffstat (limited to 'sag-0.6.1-www/Invisible/sag-0.6/node27.html')
| -rw-r--r-- | sag-0.6.1-www/Invisible/sag-0.6/node27.html | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/sag-0.6.1-www/Invisible/sag-0.6/node27.html b/sag-0.6.1-www/Invisible/sag-0.6/node27.html new file mode 100644 index 0000000..a0c8c03 --- /dev/null +++ b/sag-0.6.1-www/Invisible/sag-0.6/node27.html @@ -0,0 +1,118 @@ +<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> +<!--Converted with LaTeX2HTML 96.1-h (September 30, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --> +<HTML> +<HEAD> +<TITLE>The /proc filesystem</TITLE> +<META NAME="description" CONTENT="The /proc filesystem"> +<META NAME="keywords" CONTENT="sag"> +<META NAME="resource-type" CONTENT="document"> +<META NAME="distribution" CONTENT="global"> +<LINK REL=STYLESHEET HREF="sag.css"> +</HEAD> +<BODY LANG="EN" > + <A NAME="tex2html626" HREF="node28.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="./next_motif.gif"></A> <A NAME="tex2html624" HREF="node20.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="./up_motif.gif"></A> <A NAME="tex2html620" HREF="node26.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="./previous_motif.gif"></A> <A NAME="tex2html628" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="./contents_motif.gif"></A> <A NAME="tex2html629" HREF="node114.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="./index_motif.gif"></A> <BR> +<B> Next:</B> <A NAME="tex2html627" HREF="node28.html">Using Disks and Other </A> +<B>Up:</B> <A NAME="tex2html625" HREF="node20.html">Overview of the Directory </A> +<B> Previous:</B> <A NAME="tex2html621" HREF="node26.html">The /var filesystem</A> +<BR> <P> +<A NAME="943"> </A><H1><A NAME="SECTION00450000000000000000">The <tt>/proc</tt> filesystem</A></H1> +<P> + The <tt>/proc</tt><A NAME="945"> </A> filesystem contains a illusionary filesystem. + It does not exist on a disk. Instead, the kernel creates it + in memory. It is used to provide information about the + system (originally about processes, hence the name). Some + of the more important files and directories are explained + below. The <tt>/proc</tt><A NAME="947"> </A> filesystem is described in more detail + in the <em>proc</em><A NAME="949"> </A> manual page. + <DL ><DT><STRONG><tt>/proc/1</tt><A NAME="951"> </A></STRONG> +<DD> + A directory with information about process number 1. + Each process has a directory below <tt>/proc</tt><A NAME="953"> </A> with + the name being its process identification number. + <DT><STRONG><tt>/proc/cpuinfo</tt><A NAME="955"> </A></STRONG> +<DD> + Information about the processor, such as its type, make, + model, and perfomance. + <DT><STRONG><tt>/proc/devices</tt><A NAME="957"> </A></STRONG> +<DD> + List of device drivers configured into the currently + running kernel. + <DT><STRONG><tt>/proc/dma</tt><A NAME="959"> </A></STRONG> +<DD> + Shows which DMA channels are being used at the moment. + <DT><STRONG><tt>/proc/filesystems</tt><A NAME="961"> </A></STRONG> +<DD> + Filesystems configured into the kernel. + <DT><STRONG><tt>/proc/interrupts</tt><A NAME="963"> </A></STRONG> +<DD> + Shows which interrupts are in use, and how many of each + there have been. + <DT><STRONG><tt>/proc/ioports</tt><A NAME="965"> </A></STRONG> +<DD> + Which I/O ports are in use at the moment. + <DT><STRONG><tt>/proc/kcore</tt><A NAME="967"> </A></STRONG> +<DD> + An image of the physical memory of the system. This + is exactly the same size as your physical memory, but + does not really take up that much memory; it is generated + on the fly as programs access it. (Remember: unless you + copy it elsewhere, nothing under <tt>/proc</tt><A NAME="969"> </A> takes up + any disk space at all.) + <DT><STRONG><tt>/proc/kmsg</tt><A NAME="971"> </A></STRONG> +<DD> + Messages output by the kernel. These are also routed + to <tt>syslog</tt><A NAME="973"> </A>. + <DT><STRONG><tt>/proc/ksyms</tt><A NAME="975"> </A></STRONG> +<DD> + Symbol table for the kernel. + <DT><STRONG><tt>/proc/loadavg</tt><A NAME="977"> </A></STRONG> +<DD> + The `load average' of the system; three meaningless + indicators of how much work the system has to do at + the moment. + <DT><STRONG><tt>/proc/meminfo</tt><A NAME="979"> </A></STRONG> +<DD> + Information about memory usage, both physical and swap. + <DT><STRONG><tt>/proc/modules</tt><A NAME="981"> </A></STRONG> +<DD> + Which kernel modules are loaded at the moment. + <DT><STRONG><tt>/proc/net</tt><A NAME="983"> </A></STRONG> +<DD> + Status information about network protocols. + <DT><STRONG><tt>/proc/self</tt><A NAME="985"> </A></STRONG> +<DD> + A symbolic link to the process directory of the program + that is looking at <tt>/proc</tt><A NAME="987"> </A>. When two processes look + at <tt>/proc</tt><A NAME="989"> </A>, they get different links. This is mainly + a convenience to make it easier for programs to get + at their process directory. + <DT><STRONG><tt>/proc/stat</tt><A NAME="991"> </A></STRONG> +<DD> + Various statistics about the system, such as the number + of page faults since the system was booted. + <DT><STRONG><tt>/proc/uptime</tt><A NAME="993"> </A></STRONG> +<DD> + The time the system has been up. + <DT><STRONG><tt>/proc/version</tt><A NAME="995"> </A></STRONG> +<DD> + The kernel version. +<P> +</DL> + Note that while the above files tend to be easily readable text + files, they can sometimes be formatted in a way that is not + easily digestable. There are many commands that do little more + than read the above files and format them for easier understanding. + For example, the <tt>free</tt><A NAME="997"> </A> program reads <tt>/proc/meminfo</tt><A NAME="999"> </A> + and converts the amounts given in bytes to kilobytes (and adds + a little more information, as well). +<P> +<HR><A NAME="tex2html626" HREF="node28.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="./next_motif.gif"></A> <A NAME="tex2html624" HREF="node20.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="./up_motif.gif"></A> <A NAME="tex2html620" HREF="node26.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="./previous_motif.gif"></A> <A NAME="tex2html628" HREF="node1.html"><IMG WIDTH=65 HEIGHT=24 ALIGN=BOTTOM ALT="contents" SRC="./contents_motif.gif"></A> <A NAME="tex2html629" HREF="node114.html"><IMG WIDTH=43 HEIGHT=24 ALIGN=BOTTOM ALT="index" SRC="./index_motif.gif"></A> <BR> +<B> Next:</B> <A NAME="tex2html627" HREF="node28.html">Using Disks and Other </A> +<B>Up:</B> <A NAME="tex2html625" HREF="node20.html">Overview of the Directory </A> +<B> Previous:</B> <A NAME="tex2html621" HREF="node26.html">The /var filesystem</A> +<P><ADDRESS> +<I>Lars Wirzenius <BR> +Sat Nov 15 02:32:11 EET 1997</I> +</ADDRESS> +</BODY> +</HTML> |