Category Archives: បច្ចេកវិទ្យា

UBUNTU 11.10 available…!!!


Table of versions

Version Code name Release date Supported until
Desktops Servers
4.10 Warty Warthog 20 October 2004 30 April 2006
5.04 Hoary Hedgehog 8 April 2005 31 October 2006
5.10 Breezy Badger 13 October 2005 13 April 2007
6.06 LTS Dapper Drake 1 June 2006 14 July 2009 1 June 2011
6.10 Edgy Eft 26 October 2006 25 April 2008
7.04 Feisty Fawn 19 April 2007 19 October 2008
7.10 Gutsy Gibbon 18 October 2007 18 April 2009
8.04 LTS Hardy Heron 24 April 2008 12 May 2011 April 2013
8.10 Intrepid Ibex 30 October 2008 30 April 2010
9.04 Jaunty Jackalope 23 April 2009 23 October 2010
9.10 Karmic Koala 29 October 2009 30 April 2011
10.04 LTS Lucid Lynx 29 April 2010 April 2013 April 2015
10.10 Maverick Meerkat 10 October 2010 April 2012
11.04 Natty Narwhal 28 April 2011 October 2012
11.10 Oneiric Ocelot 13 October 2011 April 2013
12.04 LTS Precise Pangolin 26 April 2012[129] April 2015 April 2017

The naming of Ubuntu 11.10 was announced on 7 March 2011 by Mark Shuttleworth. He explained

that Oneiric means “dreamy”. Ubuntu 11.10 is scheduled for stable release on 13 October 2011.

It will be Canonical’s 15th release of Ubuntu.

Ubuntu Linux version 11.10 Desktop Screenshot

 

How to dual-boot Vista with Linux (Vista installed first) — the step-by-step guide with screenshots


Pls download this:

How to dual boot

Show Hidden Files and Folders not working?


Method 1:

Go to registry editor by running regedit in the run box.
Go to this key:
HKEY_CURRENT_USERSoftwareMicrosoft
WindowsCurrentVersionExplorerAdvanced
In the right hand area, double click hidden and change the value to 1.

Now you’re all set to go. Check it in your tools menu if the changes have taken effect.



Method 2: (By Random Hajile)

1. Click “Start” -> “Run…” (or press Windows key + R)
2. Type “regedit” and click “Ok”.
3. Find the key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer
Advanced\FolderHidden\SHOWALL
4. Look at the “CheckedValue” key… This should be a DWORD key. If it isn’t, delete the key.
5. Create a new key called “CheckedValue” as a DWORD (hexadecimal) with a value of 1.
6. The “Show hidden files & folders” check box should now work normally. Enjoy! :)

Method 3: (By Denny)

1- Click Start –> Run –> regsvr32 /i browseui.dll –> enter

A confirmation message will appear like given below

2- Click Start –> Run –> regsvr32 /i shell32.dll

Wait for the confirmation and click OK.

Method 4:

If none of the above methods work, please download our Smart Virus Remover from here:

Smart Virus Remover
Using this Virus Remover please restore your Windows settings and your show hidden files and folders will be set to default.

Please spare a few moments from your precious time and tell us about your experiences.

Bandwidth Monitoring Tools for Ubuntu Users


Bandwidth in computer networking refers to the data rate supported by a network connection or interface. One most commonly expresses bandwidth in terms of bits per second (bps). The term comes from the field of electrical engineering, where bandwidth represents the total distance or range between the highest and lowest signals on the communication channel (band).

Bandwidth represents the capacity of the connection. The greater the capacity, the more likely that greater performance will follow, though overall performance also depends on other factors, such as latency.

Here is the list of bandwidth monitoring tools for your network bandwidth

bmon
bwbar
bwm
bwm-ng
iftop
iperf
ipfm
speedometer
cbm
ibmonitor
pktstat
mactrack
MRTG
Cacti

Now we will see each tool separately

bmon

bmon is a portable bandwidth monitor and rate estimator running on various operating systems. It supports various input methods for different architectures.

Various output modes exist including an interactive curses interface, lightweight HTML output but also formatable ASCII output

Current Stable Version :- 2.1.0

Install bmon in Ubuntu

sudo apt-get install bmon

This will complete the installation.

If you want to open the application you need to enter the following command

bmon

you should see the following output

If i select the eth0 i should see all the traffic details

If you want to know more available options check man page

bwbar

This program will output a PNG and a text file that can be used in scripts or be included in web pages to show current bandwidth usage. The amount of total bandwidth can be customized. The PNG output appears as a bar graph showing maximum possible usage with the current inbound or outbound usage shown as a differently colored bar.

Current Stable Version :- 1.2.3

Install bwbar in ubuntu

sudo apt-get install bwbar

This will complete the installation

There is a /etc/default/bwbar file to configure before this package will work and here is my config

# Directory to put files into
DIR=/var/www
# Who to run as
RUNAS=www-data
# What are the options (eth0, scale of 1.5mbps)
OPTIONS=”eth0 1.5″

Now you need to chnage the permissions using the following command

sudo chown -R www-data:www-data /var/www/bwbar/

Start the bwbar using the following command

sudo /etc/init.d/bwbar start

You can also launch bwbar using the following command

bwbar eth0 100 -x 200 -y 7 -t 10 -p network.png -f network.txt -d /var/www/bwbar &

Now you need to go to http://serverip/bwbar you should see the bandwidth bar as follows

If you want to know about available option check man page

bwm

BandWidth Monitor This is a very tiny bandwidth monitor (not X11). Can monitor up to 16 interfaces in the in the same time, and shows totals too.

Current Stable Version :- 1.1.0

Install bwm ubuntu

sudo apt-get install bwm

This will complete the installation now

If you want to run the application use the following command

bwm

Output looks like below

If you want more details and available options check man page

bwm-ng

small and simple console-based bandwidth monitor.Bandwidth Monitor NG is a small and simple console-based live bandwidth monitor.

Current Stable Version :- 0.5

features

supports /proc/net/dev, netstat, getifaddr, sysctl, kstat and libstatgrab

unlimited number of interfaces supported

interfaces are added or removed dynamically from list

white-/blacklist of interfaces

output of KB/s, Kb/s, packets, errors, average, max and total sum

output in curses, plain console, CSV or HTML

configfile

Install bwm-ng in ubuntu

sudo apt-get install bwm-ng

This will complete the installation

If you want to run the application you need to use the following command

bwm-ng

Output looks like below

If you want more details and available options check man page

iftop

iftop does for network usage what top does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts.

Current Stable Version :- 0.17

Install iftop in ubuntu

sudo apt-get install iftop

This will complete the installation

If you want to run the application you need to use the following command

iftop

Output looks like below

If you want more details and available options check man page

ipfm

IP Flow Meter (IPFM) is a bandwidth analysis tool, that measures how much bandwidth specified hosts use on their Internet link.

Current Stable Version :- 0.11.5

Install ipfm in Ubuntu

sudo apt-get install ipfm

This will complete the installation

Now if you want to configure this for your network you need to copy example configuration file from /usr/share/doc/ipfm/examples if you want to check this file click here

once you configure this file you need to start the service using the following command

sudo /etc/init.d/ipfm start

If you want more details and available options check man page

Speedometer

Measure and display the rate of data across a network connection or data being stored in a file.

Current Stable Version :- 2.4

Install speedometer in ubuntu

Check which version of python is the default by running

python -V

Then issue the following commands as root to install speedometer (choose the correct Urwid package for your python version, ie. if python -V reports version 2.3.X then install python2.3-urwid)

apt-get install python2.4-urwid

Download the speedometer.py source file.

As user issue the following commands in the directory that you downloaded the source file

sudo cp speedometer.py /usr/local/bin/speedometer

sudo chown root: /usr/local/bin/speedometer

sudo chmod 755 /usr/local/bin/speedometer

Now you can run the speedometer application using the following

/usr/local/bin/speedometer

Now you should see the following screen output

Speedometer Usage

Usage: speedometer [options] tap [[-c] tap]

Available options

speedometer -h

Usage: speedometer [options] tap [[-c] tap]…

Monitor network traffic or speed/progress of a file transfer. At least one tap must be entered. -c starts a new column, otherwise taps are piled vertically.

Taps:

[-f] filename [size] display download speed [with progress bar]

-f must be used if directly following another

file tap without an expected size specified

-rx network-interface display bytes received on network-interface

-tx network-interface display bytes transmitted on network-interface

Options:

-i interval-in-seconds eg. “5″ or “0.25″ default: “1″

-p use plain-text display (one tap only)

-b use old blocky display instead of smoothed display even when UTF-8 encoding is detected

-z report zero size on files that don’t exist instead of waiting for them to be created

Usage Examples

How long it will take for my 38MB transfer to finish?

speedometer favorite_episode.rm $((38*1024*1024))

How quickly is another transfer going?

speedometer dl/big.avi

How fast is this LAN?

$ cat /dev/zero | nc -l -p 12345

$ nc host-a 12345 > /dev/null

$ speedometer -rx eth0

How fast is the upstream on this ADSL line?

speedometer -tx ppp0

How fast can I write data to my filesystem? (with at least 1GB free)

dd bs=1000000 count=1000 if=/dev/zero of=big_nothing &
speedometer big_nothing

cbm

cbm — the Color Bandwidth Meter — displays the current traffic on all network devices.

Current Stable Version :- 0.1-1

Install cbm in ubuntu

First you need to download the .deb package from here

once you have the .deb package you need to install using the following comamnd

sudo dpkg -i cbm_0.1-1_i386.deb

this will complete the installation now if you want to use the appltcation use the following command

cbm

Output looks like below

pktstat

pktstat listens to the network and shows the bandwidth being consumed by packets of various kinds in realtime. It understands some protocols (including FTP,HTTP, and X11) and adds a descriptive name next to the entry (e.g., ‘RETR cd8.iso’, ‘GET http://slashdot.org/’ or ‘xclock -fg blue’).

Current Stable Version :- 1.8.3

Install pktstat in Ubuntu

First you need to download .rpm package from here once you have the .rpm package you need to convert this .rpm file to .deb file using alien

Install alien

sudo apt-get install alien

Now you need to use the follwoing command to convert .rpm to .deb

sudo alien -k pktstat-1.7.2q-0.i386.rpm

Now you should be having pktstat_1.7.2q-0_i386.deb package

Install pktstat in Ubuntu

sudo dpkg -i pktstat_1.7.2q-0_i386.deb

This will complete the installation now you can open the application using the following command

pktstat

output looks like below


If you want more available options for pktstat check man page

ibmonitor

ibmonitor is an interactive linux console application which shows bandwidth consumed and total data transferred on all interfaces.

Current Stable Version :- 1.4

Its main features are:

Shows received, transmitted and total bandwidth of each interface

Calculates and displays the combined value of all interfaces

Displays total data transferred per interface in KB/MB/GB

Values can be displayed in Kbits/sec(Kbps) and/or KBytes/sec(KBps)

Can show maximum bandwidth consumed on each interface since start of utility

Can show average bandwidth consumption on each interface since start of utility

The output with all features (max, avg and display in Kbps and KBps) easily fits on a 80×24 console or xterm

Can interactively change its output display format depending on key pressed by user.

Install ibmonitor in Ubuntu

First you need to download the latest version from here

wget http://ovh.dl.sourceforge.net/sourceforge/ibmonitor/ibmonitor-1.4.tar.gz

Now you have ibmonitor-1.4.tar.gz

Extract this file using the following commands

tar xvfz ibmonitor-1.4.tar.gz

cd ibmonitor

If you want to run the application use the following command

Once you are in ibmonitor folder use

./ibmonitor

Output looks like the following screen

iperf

While tools to measure network performance, such as ttcp, exist, most are very old and have confusing options. Iperf was developed as a modern alternative for measuring TCP and UDP bandwidth performance.

Iperf is a tool to measure maximum TCP bandwidth, allowing the tuning of various parameters and UDP characteristics. Iperf reports bandwidth, delay jitter, datagram loss.

Current Stable Version :- 2.0.2

Install iperf in ubuntu

sudo apt-get install iperf

iperf Syntax

iperf [-s|-c host] [options]

Example

iperf -c server address -F file-name

iperf -c server address -I

The -F option is for file input.

The -I option is for input from stdin.

If you want more details and available options check man page

tcptrack

tcptrack is a sniffer which displays information about TCP connections it sees on a network interface. It passively watches for connections on the network interface, keeps track of their state and displays a list of connections in a manner similar to the unix ‘top’ command. It displays source and destination addresses and ports, connection state, idle time, and bandwidth usage.

Current Stable Version :- 1.1.5

Install tcptrack in Ubuntu

sudo apt-get install tcptrack

this will complete the installation

tcptrack Syntax

tcptrack [-dfhvp] [-r ] -i []

Examples

tcptrack requires only one parameter to run: the -i flag followed by an interface name that you want tcptrack to monitor. This is the most basic way to run tcptrack

tcptrack -i eth0

tcptrack can also take a pcap filter expression as an argument. The format of this filter expression is the same as that of tcpdump and other
libpcap-based sniffers. The following example will only show connections from host 10.45.165.2

tcptrack -i eth0 src or dst 10.45.165.2

The next example will only show web traffic (ie, traffic on port 80)

tcptrack -i eth0 port 80

The following output screen will show you more details

MRTG

The Multi Router Traffic Grapher or just simply MRTG is free software for monitoring the traffic load on network links. It allows the user to see traffic load on a network over time in graphical form.

Current Stable Version :- 2.15.0

Project Homepage

http://oss.oetiker.ch/mrtg/

Cacti

Cacti is a complete network graphing solution designed to harness the power of RRDTool’s data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive,easy to use interface that makes sense for LAN-sized installations up to complex networks with hundreds of devices.

Current Stable Version :- 0.8.6i

Project Homepage

http://www.cacti.net

Regarding MRTG and Cacti i am going write detailed articles in future

Fedora 12


Version history

Color Meaning
Red Old release; not supported[56]
Yellow Old release; still supported
Green Current release
Blue Future release
Project Name Version Code name Release date Linux version
Fedora Core 1 Yarrow 2003–11–05 2.4.19
2 Tettnang 2004–05–18 2.6.5
3 Heidelberg 2004–11–08 2.6.9
4 Stentz 2005–06–13 2.6.11
5 Bordeaux 2006–03–20 2.6.15
6 Zod 2006–10–24 2.6.18
Fedora 7 Moonshine 2007–05–31 2.6.21
8 Werewolf 2007–11–08 2.6.23.1
9 Sulphur 2008–05–13 2.6.25
10 Cambridge 2008–11–25 2.6.27
11 Leonidas 2009–06–09[57] 2.6.29.4
12 Constantine 2009–11–17[58] 2.6.31.5

ការចាប់ផ្ដើមរបស់ Fedora 12