Clone and Split 2G Virtualbox disk

In Virtual Box Media Manager release and remove disk this is important.
Run command below. Give full path, if not it will create disk in your home folder .
VBoxManage clonehd /media/VirtualBox/xpDomain/xpDomain.vdi /media/VirtualBox/xpDomain/xpSplited.vdi --format VMDK --variant Split2G

GPG error Synaptic Package Manager

For error
W: GPG error: http://download.virtualbox.org lucid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 54422A4B98AB5139

run this command
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 54422A4B98AB5139

ssh initial connection slow

Check /etc/resolv.conf file and verify dns is working for the remote server.

Citrix Client in Linux

Download and install package
http://www.citrix.com/English/ss/downloads/details.asp?downloadId=3323&productId=186&c1=sot2755&c2=ost1349860#top

Opening from web page
1. For the .mailcap file modification, in $HOME, create or modify the .mailcap file and add the line:
application/x-ica; /usr/lib/ICAClient/wfica.sh %s; x-mozilla-flags=plugin:Citrix ICA
2. For the MIME file modification, in $HOME, create or modify the .mime.types file and add the line:
application/x-ica ica


For ssl error

$ sudo cp /usr/share/ca-certificates/mozilla/GlobalSign_Root_CA.crt /usr/lib/ICAClient/keystore/cacerts/

Now you can use citrix client.

User Profile Deletion Utility

User Profile Deletion Utility (Delprof.exe)
Delprof.exe is available in the Windows Server 2003 Resource Kit. It is a command-line utility that you can use to delete user profiles on a local or remote computers running Windows 2000, Windows XP, and Windows Server 2003. User profiles can grow large and may take up considerable disk space, especially if there are several users using one computer. Because of this, you may want to use Delprof.exe to free disk space by deleting profiles that are no longer required. However, because each profile on the computer is presented in order when you run the utility, you may want to use the graphical interface instead of the command-line tool whenever possible.

http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=901a9b95-6063-4462-8150-360394e98e1e

Put Close/Maximize/Minimize Buttons on the Left in Ubuntu

Ubuntu 10.04 buttons are on the right side. I move them to right
Alt+F2
Go apps \ metacity \ general
You will see button_layout
change order
close,maximize,minimize:
to
:minimize,maximize,close

Mysql reset root password

# /etc/init.d/mysqld stop
# mysqld_safe --skip-grant-tables &
# mysql -u root

mysql> use mysql;
mysql> update user set password=PASSWORD("yournewpasswordhere") where User='root';
mysql> flush privileges;
mysql> quit

# /etc/init.d/mysqld stop
# /etc/init.d/mysqld start

Now you can login with your new password
# mysql -u root -p

Ubuntu set week start to monday

locale | grep LC_TIME
LC_TIME=en_US.UTF-8
cd /usr/share/i18n/locales
sudo cp en_US en_US_custom
sudo gedit en_US_custom
first_weekday 1 --> 2
sudo gedit /etc/environment
LC_TIME="en_US_custom.UTF-8"

Linux Remove file start with special character

Delte file name --help or -help

rm ./--help
rm -- --help

Linux Remove file start with special character

Delte file name --help or -help

rm ./--help
rm -- --help

Ubuntu installing same packages to another ubuntu

I want to prepare test OS for my ubuntu. Before appyling patches or new software I do testing on that machine (running on virtualbox)
MachineA $ dpkg --get-selections > mypackages.txt

MachineB $ sudo dpkg --set-selections < mypackages.txt
MachineB $ sudo apt-get dselect-upgrade

nagios create readonly user

# cd /etc/nagios/

htpasswd passowrdfile readonlyuser
# htpasswd htpasswd.users nagiosuser

Enter you password.

Then edit cgi.cfg file.There are different access you can enable.
# SYSTEM/PROCESS INFORMATION ACCESS
# CONFIGURATION INFORMATION ACCESS
# SYSTEM/PROCESS COMMAND ACCESS
# GLOBAL HOST/SERVICE VIEW ACCESS
# GLOBAL HOST/SERVICE COMMAND ACCESS

"GLOBAL HOST/SERVICE VIEW ACCESS" access is enough for read only users.
authorized_for_all_services=nagiosadmin,nagiosuser
authorized_for_all_hosts=nagiosadmin,nagiosuser

Moving Ubuntu in Company

M$ Windows OS is only supported OS in my company. But I decided to move linux, because i am administrating around 180 Linux bases machine. These are tools which used before and afer .

M$ Office 2007 --> Installed Crossover Linux and M$ Office 2007
M$ Office Communicator --> Pidgin with Office communicator plug in
Windows share --> samba smb://domain;username@host/share and add "connect to a server" applet to panel.
Remote Desktop --> Terminal Server Client
Securcrt --> ssh in console itself with ssh key and clusterssh
wireless --> Also wireless is ok with dynamic wep protected eap with ca certificate and mschapv2 authentication.
internet explorer --> firefox and google chrome
babylon dictionary --> stardict
backup --> ddrescue and rsync for individual folders
gtalk --> cntlm and pidgin
vpn --> kvpnc
itunes --> gtkpod and rhythmbox

Pidgin ntlmaps gtalk behind isa proxy

I need to connect gtalk. Because support team of vendor companies using gtalk.
Nntlmaps; proxy software that allows you to authenticate via an MS Proxy Server

Install ntlmaps
# sudo apt-get install ntlmaps

configure ntlmaps
# vi /etc/ntlmaps/server.cfg

PARENT_PROXY: your isa proxy ip adress
PARENT_PROXY_PORT: you isa proxy port
NT_DOMAIN: domainname
USER: nt username
PASSWORD: nt password
LISTEN_PORT:5865 (ntlmaps listen port)

Pidgin --> accounts --> manage accounts --> modify --> advanced
check force old ssl clear others
connect port: 443
connect server: talk.google.com

In proxy tab
Proxy type: http
Host: 127.0.0.1
Port: 5865 (ntlmaps port)
Username: nt username
password : nt password

Ssh user config file

I got bored running command ssh -Y root@hostname everytime. So I created ssh config file my user. So my user connects remote computer with ssh command and allowed X11 forwarding.

edit ssh config file in your home directory
vi ~/.ssh/config

Add this line
User root
ForwardX11 yes


I use ssh passwordless login (ssh keygen) for remote computers. Also clusterssh for executing remote commands one time.

ClusterSSH controls a number of xterm windows via a single graphical console window to allow commands to be interactively run on multiple servers over an ssh connection.