my system configuration Post: 302557579

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Top Forums Shell Programming and Scripting my system configuration Post 302557579 by Corona688 on Wednesday 21st of September 2011 03:33:07 PM

09-21-2011

Registered User

Some comments:

1) We often get the "linux newbie memory freakout" here. A new user may see "56M free" and panic -- rebooting obsessively when free gets low, plugging bizzare and harmful values into /proc/vm to "flush the cache", and sometimes even reformatting just to try and solve an imaginary memory leak. Any decently busy system converts 'free' to 'cache' in short order, which is fine -- cache is as good as free.

2) It'd be better to leave dmidecode out than demand random people run your untested script as root.

3) Run ifconfig with the full path, /sbin/ifconfig, so non-root users can find it.

4) Not everyone has java. Test if java exists before trying to get its version.

5) You can get disk information without root and fdisk, as well as tons of other stuff, via /sys:

Code:

# Sizes and models of all hard drives
TOTAL=0
for X in /sys/class/block/[sh]d[a-z]
do
        D=$(basename ${X})
        read TYPE < ${X}/removable
        read SIZE < ${X}/size
        read MODEL <"${X}/device/model"
        [ "$TYPE" = 0 ] || continue # Ignore removable drives
        set -- ${X}[1-9]* # Set $# to the number of partitions

        TOTAL=$((TOTAL + SIZE))
        echo "$D[1-$#]: $(((SIZE*512)/(1000*1000*1000)))GB $MODEL"
done

echo "Total: $(( (TOTAL*512)/(1000*1000*1000) )) GB"

# MAC addresses of all network cards
for DEV in /sys/class/net/*
do
        D=`basename $DEV`
        [ "$D" = "lo" ] && continue # Ignore loopback
        [ "$D" = "sit0" ] && continue # Ignore ipv6 tunnel

        read MAC < $DEV/address
        echo "$D mac $MAC"
done

# Get some DMI information without needing root
cat /sys/class/dmi/id/* 2>/dev/null

Last edited by Corona688; 09-21-2011 at 04:47 PM..

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sys::statistics::linux::filestats

Sys::Statistics::Linux::FileStats(3pm)			User Contributed Perl Documentation		    Sys::Statistics::Linux::FileStats(3pm)

NAME

       Sys::Statistics::Linux::FileStats - Collect linux file statistics.

SYNOPSIS

	   use Sys::Statistics::Linux::FileStats;

	   my $lxs  = Sys::Statistics::Linux::FileStats->new;
	   my $stat = $lxs->get;

DESCRIPTION

       Sys::Statistics::Linux::FileStats gathers file statistics from the virtual /proc filesystem (procfs).

       For more information read the documentation of the front-end module Sys::Statistics::Linux.

FILE STATISTICS

       Generated by /proc/sys/fs/file-nr, /proc/sys/fs/inode-nr and /proc/sys/fs/dentry-state.

	   fhalloc    -  Number of allocated file handles.
	   fhfree     -  Number of free file handles.
	   fhmax      -  Number of maximum file handles.
	   inalloc    -  Number of allocated inodes.
	   infree     -  Number of free inodes.
	   inmax      -  Number of maximum inodes.
	   dentries   -  Dirty directory cache entries.
	   unused     -  Free diretory cache size.
	   agelimit   -  Time in seconds the dirty cache entries can be reclaimed.
	   wantpages  -  Pages that are requested by the system when memory is short.

METHODS

   new()
       Call "new()" to create a new object.

	   my $lxs = Sys::Statistics::Linux::FileStats->new;

       It's possible to set the path to the proc filesystem.

	    Sys::Statistics::Linux::FileStats->new(
	       files => {
		   # This is the default
		   path     => '/proc',
		   file_nr  => 'sys/fs/file-nr',
		   inode_nr => 'sys/fs/inode-nr',
		   dentries => 'sys/fs/dentry-state',
	       }
	   );

   get()
       Call "get()" to get the statistics. "get()" returns the statistics as a hash reference.

	   my $stat = $lxs->get;

EXPORTS

       No exports.

SEE ALSO

       proc(5)

REPORTING BUGS

       Please report all bugs to <jschulz.cpan(at)bloonix.de>.

AUTHOR

       Jonny Schulz <jschulz.cpan(at)bloonix.de>.

COPYRIGHT

       Copyright (c) 2006, 2007 by Jonny Schulz. All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-03-09				    Sys::Statistics::Linux::FileStats(3pm)