ICT Solutions!!

(Note: I have written this tutorial for FreeBSD server)

First Install Apache in your server.

Apache22

Install Postfix on FreeBSD

Installing Postfix mail server on FreeBSD server from ports is easy. Just type two commands, you will be ready to go

Installation ask you few questions, just enter y for yes. After   installation is finished, you need to disable sendmail and enable   postfix, this can be done by modifying /etc/rc.conf

Add following line to end of /etc/rc.conf file

Now reboot the server, on booting up, you will be using postfix as your mail server.

You can also set a symlink from /etc/postfix to /usr/local/etc/postfix

Now, Test your postfix server either working or not.

You will get following message

If you input

Output is like this

Send a test email in your mailbox

You are done Check your mailbox either it is arriving or not. If arrived !!!

Cheers !!

OpenSSH

OpenSSH is a FREE version of the SSH connectivity tools that technical users of the Internet rely on. Users of telnet, rlogin, and ftp may not realize that their password is transmitted across the Internet unencrypted, but it is. OpenSSH encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection hijacking, and other attacks. Additionally, OpenSSH provides secure tunneling capabilities and several authentication methods, and supports all SSH protocol versions.

Here is a brief tutorial for easy setup.
Install SSH

Study following tutorial thoroughly and setup your unix/linux machine secure.

Step1:

Create Public and private keys from openssh and save it to your local computer by following command in your unix machine.

2 keys are

• id_rsa.pub (Public Key)
• id_rsa (Private Key)

Step 2:
Change the mode of public key

Step 3:
Transport the key to the server

Step 4:

Make a .ssh directory in the home of the user

Step 5:
Change the key to authorized key in .ssh folder.

(Multiple Public can pe kept in server with same name either dsa key or rsa key from putty or linux)

Client Setting
Make directory .ssh in home of the user at local.

Now Connect your server with the key you generated by following command.

Connecting Server with PuTTY Key

Download PuTTY Installer from the following link
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

Step 1.

Install the Putty in your local windows machine.

Step 2.

Generating Key pairs from PuTTYgen. Move your mouse during key generation.

Save your public key and private key in your folder.

Step 3.

Transport the key to the server

Step 4 .

Make a .ssh directory in the home of the user

Step 5 .

Transforming putty key into open-ssh key

In order to translate putty key into open-ssh key, you need to have ssh-keygen tool in your computer

Putty Setting

1. Start putty
2. Make a new session
3. Set server ip in the Host/IP address form as shown in figure below
4. Save the session as per the name of your server as shown in figure(pc1f044@feeBSD)
5. Set the private key in the putty as shown in figure.



-go to ssh

-click auth

6. give path of your private key.



7. Save your session
8. Connect to the server.
9. Congratulation

Disable Password Authentication

Use your favourite text editor Vim to edit /etc/ssh/sshd_config on the machine you wish to ssh to, and set these options.

Restart ssh server

Cheers !!

Re: gpg error ppa.launchpad.net intrepid Release
What you need to do, is the following:

Open gnome-terminal and enter the following:

gpg –keyserver subkeys.pgp.net –recv C71839136CF5CE97
(replace “C71839136CF5CE97” by the code in your error message)

Then enter the following:

gpg –export –armor C71839136CF5CE97 | sudo apt-key add –
(here again, replace “C71839136CF5CE97” by the code in your error message)

Then, to finish off, enter the following:

sudo apt-get update

(RECOMMENDED FOR DEBIAN & UBUNTU)

General Question:

I have installed the new Teamviewer Beta for Linux onto my computer which is running Debian 6.0.1. It is working awesome! However right now, if I need for any reason to restart my home computer (debian) I can not logon to my computer again as Teamviewer is down.

So my question is, how can I either
1) setup teamviewer to start as a service as soon as the computer has started, and not me logging in yet. or
2) start teamviewer from command line?

Thanks for any help on the subject.

Solution 1 :

Solution 2 :

(Note: Here I am Describing DNS Setting in FreeBSD. I hope this tutorial is helpful for Linux and other BSD distribution. )
FreeBSD utilizes, by default, a version of BIND (Berkeley Internet Name Domain), which is the most common implementation of the DNS protocol. DNS is the protocol through which names are mapped to IP addresses, and vice versa. For example, a query for www.drpaudel.com.np will receive a reply with the IP address of my blog server, whereas, a query for ftp.drpaudel.com.np will return the IP address of the corresponding FTP machine. Likewise, the opposite can happen. A query for an IP address can resolve its hostname. It is not necessary to run a name server to perform DNS lookups on a system.

Starting BIND

The default named configuration is that of a basic resolving name server, running in a chroot environment, and restricted to listening on the local IPv4 loopback address (127.0.0.1). To start the server one time with this configuration, use the following command:

# /etc/rc.d/named onestart
To ensure the named daemon is started at boot each time, put the following line into the /etc/rc.conf:

There are obviously many configuration options for /etc/namedb/named.conf that are beyond the scope of this document. However, if you are interested in the startup options for named on FreeBSD, take a look at the named_* flags in /etc/defaults/rc.conf and consult the rc.conf(5) manual page. The Section 12.7 section is also a good read.

Configuration Files

Configuration files for named currently reside in /etc/namedb directory and will need modification before use unless all that is needed is a simple resolver. This is where most of the configuration will be performed.
/var/named/etc/namedb/named.conf

/var/named/etc/namedb/master/pc1f018.wakhok.ac.jp.rev

/var/named/etc/namedb/master/pc1f018.wakhok.ac.jp.del

/var/named/etc/namedb/master/localhost.zone

/var/named/etc/namedb/master/localhost.rev

Enable named in rc.conf by

The /etc/rc.conf file is in my case is as below.

Create rndc-key by following command

Start typing whatever you like until it says stop typing

send your key to name.conf by following command. First you must go to /etc/namedb

Restart named by following Command

It may give following error

To fix this error, edit the following file:

Change:

into:

Then restart bind:

Change ownership for named

Now You will must see the success reply

Now you can dig using following command.

You must get Query: 1, Answer :1 …………..

Also, do nslookup

You will get server and Nameserver Host and IP.

• Use a USB Key to Install Windows 7—Even on a Netbook

  Keeping the Windows 7 installation on a USB thumb drive has a few advantages—a small USB key is much more convenient for carrying around than a DVD, the OS will actually install much faster, and you can use a USB key to install Windows 7 on systems that do not have a DVD drive, such as a netbook. In fact, you can even install Windows 7 on netbooks that have fairly modest hardware. Dennis Chung, an IT Pro Evangelist at Microsoft recently posted a video demonstrating how easy it is to prepare your thumb drive and use it to install Windows 7. Here’s a quick look at the process:

• First, you’ll need the DiskPart utility on the system you will use to prep the thumb drive. This is a free disk partitioning utility that is likely already installed on your Windows system. If not, you can download DiskPart here.
• Launch the DiskPart utility by typing.
diskpart
• Then run the list disk command to check the status of your drive.
list disk
• Now run select disk 1 where the “1” is actually the corresponding number of your USB drive.
select disk 1
• Run clean.
clean
• Once the thumb drive is clean, you can run create partition primary.
create partition primary
• Now make the partition active by entering active
active
• Then you need to set up the file system as Fat32 by running format fs=fat32 quick (quick, of course, specifies that you want to perform a quick format to speed up the process).
format fs=fat32 quick

Or
format fs=ntfs quick

Entering the assign command gives the USB drive a drive letter, making it easy to access from Windows Explorer

assign

Then you can copy everything from the Windows 7 installation DVD onto the USB key (a simple drag and drop will do).

• Now you can insert the thumb drive into the system you want to install Windows 7 onto and boot the system. The installation will now proceed as usual—but faster.

A computer running Linux may only make a few drives (e.g., partitions on a hard disk or on a flash drive) available, among all drives recognized by the system. Unlike Windows, Linux does not keep independent folder hierarchies on separate drives designated by different letters. Linux integrates the files stored on separate drives into the same folder hierarchy. Users add a new drive by “mounting” it, that is, by designating a folder in the global hierarchy under which the contents of the new drive will be placed. You can easily mount and unmount drives on Linux.

Mount

Insert your USB Removable drive.
You will similar message

kernel: umass0: vendor 0x0000 USB Mass Storage Device, rev 2.00/1.00, addr 2
kernel: da0 at umass-sim0 bus 0 target 0 lun 0
kernel: da0:
Removable Direct Access SCSI-2 device
kernel: da0: 40.000MB/s transfers
kernel: da0: 2000MB (4048000 512 byte sectors: 64H 32S/T 1000C)

Make a folder for mounting your drive data.

Now, Mount your drive.

Now you can check your data

Add or copy your data as per your need.

Unmount

Finally, Unmount your removable drive with following command.

To pull out the USB memory unmounted.