Creating a chroot environment in Fedora with bash and other utils.

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I am testing some of my scripts to work on a very old system and there the versions of the most popular applications are very old, real old :(. So, some of things that I am very used to since last couple of years, do not seem to work as expected and I need to keep verifying a lot of things on the server, very inconvinient to keep testing the script on the server (need to connect on VPN) just to test some very simple things.

Total upload and download on any interface.

Something that I have been searching for a long time, finally some look inside the <a class=“zem_slink” title=“Procfs” rel=“wikipedia” href=“http://en.wikipedia.org/wiki/Procfs" _mce_href=“http://en.wikipedia.org/wiki/Procfs">/proc got me what I wanted. Hope this will save someone’s day. So far, the only option I could think of was to run conky which becomes a little heave on some of the very old laptops I have to use sometimes 🙁

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      &nbsp;cat /proc/net/dev|grep eth2|awk '{print $2/1024/1024"&nbsp; "$10/1024/1024}'
    </div>
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Solaris dump analysis

I had to debug a solaris crash dump and had no ides. Google search wasn’t much useful until finally I found this article:

http://cuddletech.com/blog/?p+AD0-448

have a look at this article, this suggests how to debug the core and find the offending process and root cause of the core in case of kernel panic.

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• Change Hostname in Solaris 10 (unixrain.wordpress.com)
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Unix shell script for removing duplicate files

The following shell script finds duplicate (2 or more identical) files and outputs a new shell script containing commented-out rm statements for deleting them (copy-paste from here):

::: updated on 02 May 20121, seems like wordpress did not like it so well so reformatting the code :::::::

#!/bin/bash -
#===============================================================================
#
#          FILE:  a.sh
#
#         USAGE:  ./a.sh
#
#   DESCRIPTION:
#
#       OPTIONS:  ---
#  REQUIREMENTS:  ---
#          BUGS:  ---
#         NOTES:  ---
#        AUTHOR: Amit Agarwal (aka), amit.agarwal@roamware.com
#       COMPANY: blog.amit-agarwal.co.in
#       CREATED: 02/05/12 06:52:08 IST
# Last modified: Wed May 02, 2012  07:03AM
#      REVISION:  ---
#===============================================================================

OUTF=rem-duplicates.sh;
echo "#!/bin/sh" >$OUTF;
find "$@" -type f -exec md5sum {} \; 2>/dev/null | sort --key=1,32 | uniq -w 32 -d |cut -b 1-32 --complement |sed 's/^/rm -f/' >>$OUTF

Pretty good one line, I must say 🙂

10 Useful Sar (Sysstat) Examples for UNIX / Linux Performance Monitoring

10 Useful Sar (Sysstat) Examples for UNIX / Linux Performance Monitoring

by Ramesh Natarajan on March 29, 2011

Using sar you can monitor performance of various Linux subsystems (CPU, Memory, I/O..) in real time.

Using sar, you can also collect all performance data on an on-going basis, store them, and do historical analysis to identify bottlenecks.

Sar is part of the sysstat package.

This article explains how to install and configure sysstat package (which contains sar utility) and explains how to monitor the following Linux performance statistics using sar.

Results of Fedora 16 Release Name Voting

Fedora 16 is codenamed Verne. Here are other details:

The voting has concluded for the Fedora 16 release name, and the
results are in!  Thank you to the Fedora community members who made
name suggestions and participated in the voting.

The Fedora 16 release name is: Verne

Voting period:  Tuesday 2011-04-05 00:00:00 to Monday 2011-04-11 23:59:59
Number of valid ballots cast:  421

Using the range voting method, each candidate could attain a maximum
of (421*9) = 3789 votes.

The Ultimate Guide to Getting Support on Linux-use empathy to login to IRC….

The Ultimate Guide to Getting Support on Linux
Installing Linux has become effortless to the extent that anyone with a little knowledge of computers can get a Linux machine up and running instantly. However, many of them throw in the towel when faced with even the slightest of glitches. The main reason for this is the belief that Linux doesn’t offer any kind of support.

Other problem users face is that the regular technician who repairs their computer refuses even to touch a machine that’s running Linux. So, if you are one of those users disgruntled after encountering a multitude of problems with a fresh Linux install — don’t panic and read on to know some ways in which you could get support for your Linux installation.