To set up Microsoft Office 365, login to cPanel, then add/update the following DNS records for the domain(s) in question:

example.com.au.   300   MX    0 example-com-au.mail.eo.outlook.com.
example.com.au.   3600  TXT   MS=ms000000
autodiscover        3600  CNAME autodiscover.outlook.com.
example.com.au.   3600  TXT   "v=spf1 include:outlook.com ~all"
_sip                3600  SRV   100 1 443 sipdir.online.lync.com.
_sipfederationtls   3600  SRV   100 1 5061  sipfed.online.lync.com.
sip                 3600  CNAME sipdir.online.lync.com.
lyncdiscover        3600  CNAME webdir.online.lync.com.

Notes:

  • The MS record shown in red is a number supplied by Microsoft as part of the verification rocess.
  • The MX record contains the domain name as a prefix, with periods replaced by hyphens.
Then, change the Email Routing setting down the bottom to “Remote Mail Exchanger”.

There are plenty of reasons you would need to add secondary IP addresss (and everyone agrees that SEO is not one of them). Getting a secondary IP address is a simple process if it is done for the right reasons and done correctly. You do NOT need additional NIC cards but you will be creating virtual adapters as the secondary IP will be routing through the primary IP.

Also, this is a great thing to do at home as I’ve done it to run multiple internal IP addresses on one server to run multiple applications across the same ports (for KISS** sake). Please note that I am doing this is in a virtual testing environment so your settings will definitely be different.

** KISS = Keep It Stupid Simple **

You will need to be the root user and navigate to your /etc/sysconfig/network-scripts

 # cd /etc/sysconfig/network-scripts

When getting a list of files in the directory you will see “ifcfg-eth0” (or eth1 if you’re doing it for a different adapter)

 # ls -l | grep ifcfg-eth
-rw-r--r-- 1 root root   119 Jan 11 19:16 ifcfg-eth0
-rw-r--r-- 1 root root   119 Jan  3 08:45 ifcfg-eth0.bak
-rw-r--r-- 1 root root   119 Feb 24 04:34 ifcfg-eth1
-rw-r--r-- 1 root root   128 Jan 19 18:20 ifcfg-eth1.bak

Now adding the virtual adapters is easy. Basically if the main adapter is called “eth0” you have to call the next (virtual) adapter in a sequential order like so:

  • ifcfg-eth0 (primary adapter, physical)
  • ifcfg-eth0:1 (first virtual adapter to the physical primary adapter)
  • ifcfg-eth0:2 (second virtual adapter to the physical primary adapter)
  • and so on…

That being said, lets go ahead and copy our primary adapter configuration file and name it to be the first virtual adapter for the physical primary:

 # cp ifcfg-eth0 ifcfg-eth0:1
# ls -l | grep ifcfg-eth
-rw-r--r-- 1 root root   119 Jan 11 19:16 ifcfg-eth0
-rw-r--r-- 1 root root   119 Feb 24 08:53 ifcfg-eth0:1
-rw-r--r-- 1 root root   119 Jan  3 08:45 ifcfg-eth0.bak
-rw-r--r-- 1 root root   119 Feb 24 04:34 ifcfg-eth1
-rw-r--r-- 1 root root   128 Jan 19 18:20 ifcfg-eth1.bak

Now, we have to configure this virtual adapter to be: a static IP (of course), no hardware address (MAC), configure netmask and of course rename the device.

 # vim ifcfg-eth0:1
DEVICE=eth0:1
BOOTPROTO=static
ONBOOT=yes
IPADDR=10.1.1.2
NETMASK=255.255.255.0

There is no need to specify a MAC address as it is a virtual adapter and there is also no need to specify a default gateway as it is already routed through the primary adapter. Basically there are only four things that you will need to change:

  • File name for the adapter itself
  • DEVICE=<device name> (should correspond with the file name)
  • IPADDR=<ip address>
  • NETMASK=<netmask>

Afterwards, just restart the networking service:

 # service network restart

That’s it; lets check ifconfig to make sure the virtual adapter is there and working:

 # ifconfig eth0:1
eth0:1    Link encap:Ethernet  HWaddr 08:00:27:ED:05:B7
inet addr:10.1.1.2  Bcast:10.1.1.255  Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

# ping 10.1.1.2
PING 10.1.1.2 (10.1.1.2) 56(84) bytes of data.
64 bytes from 10.1.1.2: icmp_seq=1 ttl=64 time=0.073 ms
64 bytes from 10.1.1.2: icmp_seq=2 ttl=64 time=0.042 ms
64 bytes from 10.1.1.2: icmp_seq=3 ttl=64 time=0.029 ms
64 bytes from 10.1.1.2: icmp_seq=4 ttl=64 time=0.029 ms
--- 10.1.1.2 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 2999ms
rtt min/avg/max/mdev = 0.029/0.043/0.073/0.018 ms

Per Steven’s comment: a second note. If you’re not sure if you’ve done it right and you do not want to restart the entire network server, you can use the following:

 # ifup eth0:1

The virtual network (virbr0) used for Network address translation (NAT) which allows guests to access to network services. However, NAT slows down things and only recommended for desktop installations. To disable Network address translation (NAT) forwarding type the following commands:

Display Current Setup

Type the following command:
# ifconfig
Sample outputs:

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:39 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:7921 (7.7 KiB)

Or use the following command:
# virsh net-list
Sample outputs:

Name                 State      Autostart
-----------------------------------------
default              active     yes

To disable virbr0, enter:
# virsh net-destroy default
# virsh net-undefine default
# service libvirtd restart
# ifconfig 

Mondo Rescue is an open source, free disaster recovery and backup utility that allows you to easily create complete system (Linux or Windows) Clone/Backup ISO Images to CD, DVD, Tape, USB devices, Hard Disk, and NFS. And can be used to quickly restore or redeploy working image into other systems, in the event of data loss, you will be able to restore as much as entire system data from backup media.

Mondo program is available freely for download and released under GPL (GNU Public License) and has been tested on a large number of Linux distributions.

This article describes Mondo installation and usage of Mondo Tools to backup of your entire systems. The Mondo Rescue is a Disaster Recovery and Backup Solutions for System Administrators to take full backup of their Linux and Windows file system partitions into CD/DVD, Tape, NFS and restore them with the help of Mondo Restore media feature that uses at boot-time.

Installing MondoRescue on RHEL / CentOS / Scientific Linux

The latest Mondo Rescue packages (current version of Mondo is 3.0.3-1) can be obtained from the “MondoRescue Repository“. Use “wget” command to download and add repository under your system. The Mondo repository will install suitable binary software packages such as afio, buffer, mindi, mindi-busybox, mondo and mondo-doc for your distribution, if they are available.

For RHEL/CentOS/SL 6,5,4 – 32-Bit

Download the MondoRescue repository under “/etc/yum.repos.d/” as file name “mondorescue.repo“. Please download correct repository for your Linux OS distribution version.

 # cd /etc/yum.repos.d/

## On RHEL/CentOS/SL 6 - 32-Bit ##
# wget ftp://ftp.mondorescue.org/rhel/6/i386/mondorescue.repo

## On RHEL/CentOS/SL 5 - 32-Bit ##
# wget ftp://ftp.mondorescue.org/rhel/5/i386/mondorescue.repo

## On RHEL/CentOS/SL 4 - 32-Bit ##
# wget ftp://ftp.mondorescue.org/rhel/4/i386/mondorescue.repo

For RHEL/CentOS/SL 6,5,4 – 64-Bit

 # cd /etc/yum.repos.d/

## On RHEL/CentOS/SL 6 - 64-Bit ##
# wget ftp://ftp.mondorescue.org/rhel/6/x86_64/mondorescue.repo

## On RHEL/CentOS/SL 5 - 64-Bit ##
# wget ftp://ftp.mondorescue.org/rhel/5/x86_64/mondorescue.repo

## On RHEL/CentOS/SL 4 - 64-Bit ##
# wget ftp://ftp.mondorescue.org/rhel/4/x86_64/mondorescue.repo

Once you successfully added repository, do “yum” to install latest Mondo tool.

 # yum install mondo

Installing MondoRescue on Debian / Ubuntu / Linux Mint

Debian user’s can do “wget” to grab the MondoRescue repository for Debain 6 and 5 distributions. Run the following command to add “mondorescue.sources.list” to “/etc/apt/sources.list” file to install Mondo packages.

On Debian

 ## On Debian 6 ##
# wget ftp://ftp.mondorescue.org/debian/6/mondorescue.sources.list
# sh -c "cat mondorescue.sources.list >> /etc/apt/sources.list" 
# apt-get update 
# apt-get install mondo
 ## On Debian 5 ##
# wget ftp://ftp.mondorescue.org/debian/5/mondorescue.sources.list
# sh -c "cat mondorescue.sources.list >> /etc/apt/sources.list" 
# apt-get update 
# apt-get install mondo

On Ubuntu/Linux Mint

To install Mondo Rescue in Ubuntu 12.10, 12.04, 11.10, 11.04, 10.10 and 10.04 or Linux Mint 13, open the terminal and add the MondoRescue repository in “/etc/apt/sources.list” file. Run these following commands to install Mondo Resuce packages.

 # wget ftp://ftp.mondorescue.org/ubuntu/`lsb_release -r|awk '{print $2}'`/mondorescue.sources.list
# sh -c "cat mondorescue.sources.list >> /etc/apt/sources.list" 
# apt-get update 
# apt-get install mondo

Creating Cloning or Backup ISO Image of System/Server

After installing Mondo, Run “mondoarchive” command as “root” user. Then follow screenshots that shows how to create an ISO based backup media of your full system.

 # mondoarchive

Welcome to Mondo Rescue

Mondo Rescue Welcome Screen

Mondo Rescue Welcome Screen


Please enter the full path name to the directory for your ISO Images. For example: /mnt/backup/

Mondo Rescue Storage Directory

Mondo Rescue Storage Directory

Select Type of compression. For example: bzip, gzip or lzo.

Select Type of Compression

Select Type of Compression

Select the maximum compression option.

Mondo Rescue Compression Speed

Select Compression Speed

Please enter how large you want each ISO image in MB (Megabytes). This should be less than or equal to the size of the CD-R(W)’s (i.e. 700) and for DVD’s (i.e. 4480).

Mondo Rescue ISO Size

Define Mondo Rescue ISO Size

Please give a name of your ISO image filename. For example: tecmint1 to obtain tecmint-[1-9]*.iso files.

Mondo Rescue Prefix

Enter Name of Mondo Rescue

Please add the filesystems to backup (separated by “|“). The default filesystem is “/” means full backup.

Mondo Rescue Backup Paths

Enter Backup Paths

Please exclude the filesystem that you don’t want to backup (separated by “|“). For example: “/tmp” and “/proc” are always excluded or if you want full backup of your system, just hit enter.

Mondo Rescue Exclude Paths

Enter Exclude File System

Please enter your temporary directory path or select default one.

Mondo Rescue Temporary  Directory

Enter Temporary Directory Name

Please enter your scratch directory path or select default one.

Mondo Rescue Scratch  Directory Name

Enter Scratch Directory Name

If you would like to backup extended attributes. Just hit “enter“.

Mondo Rescue Extended Backup

Enter Extended Backup Attributes

If you want to Verify your backup, after mondo has created them. Click “Yes“.

Mondo Rescue Verify Backups

Verify Backups

If you’re using stable standalone Linux Kernel, click “Yes” or if you using other Kernel say “Gentoo” or “Debain” hit “No“.

Mondo Rescue Kernel

Select Stable Linux Kernel

Click “Yes” to proceed further.

Mondo Rescue Backup Process

Proceed Cloning Process

Creating a catalog of “/” filesystem.

Mondo Rescue Making Catalog

Creating Catalog for File System

Dividing filelist into sets.

Mondo Rescue Dividing File List

Dividing File List

Calling MINDI to create boot+data disk.

Mondo Rescue Boot Data Disk

Creating Boot Data Disk

Backing up filesytem. It may take a couple of hours, please be patient.

Mondo Rescue Backup Filesystem

Backing up File System

Backing up big files.

Mondo Rescue Big Files Backup

Big Files Backup

Running “mkisofs” to make ISO Image.

Mondo Rescue Creating ISO

Making ISO Image

Verifying ISO Image tarballs.

Mondo Rescue Verify ISO

Verify ISO

Verifying ISO Image Big files.

Mondo Rescue Verify Big Files

Verify Big Files

Finally, Mondo Archive has completed. Please hit “Enter” to back to the shell prompt.

Mondo Rescue Backup Completed

Backup Completed

If you’ve selected default backup path, you will see an ISO image under “/var/cache/mondo/“, that you can burnt into a CD/DVD for later restore.

To restore all files automatically, boot the system with Mondo ISO Image and at boot prompt type “nuke” to restore files. Here is the detailed video that demonstrates how to restore files automatically from CD/DVDmedia.

Introduction

In most instances, the Linux servers I setup are used to host the Oracle database software and only require using the Command-Line Interface (CLI) for the OS. This is beneficial because I only need to perform a minimal installation and can add only those required Linux packages (RPMs) needed to support the database. However, there are situations where I need to access a graphical desktop in order to install or run certain Graphical User Interface (GUI) applications.

This guide provides the steps needed to add the GNOME Desktop to a CentOS minimal installation where the OS was installed without the X Window System.

CentOS 6

In this section, the GNOME desktop will be added to a new server running CentOS 6.2 (x86_64) after performing a “Minimal” install.

Install Desktop Packages

# yum -y groupinstall "Desktop" "Desktop Platform" "X Window System" "Fonts"

You can also install the following optional GUI packages.

# yum -y groupinstall "Graphical Administration Tools"

# yum -y groupinstall "Internet Browser"

# yum -y groupinstall "General Purpose Desktop"

# yum -y groupinstall "Office Suite and Productivity"

# yum -y groupinstall "Graphics Creation Tools"

Finally, if you wanted to add the K Desktop Environment (KDE).

# yum -y groupinstall kde-desktop

When using yum groupinstall, the groupinstall option only installs default and mandatory packages from the group. There are times when you also want to include optional packages within a group. I have not figured out (yet) how to control which package types to install (group package “policy”) from the command-line using yum. The only method I know of to also include optional packages is to edit the /etc/yum.conf file and add the following to the [main] section:

group_package_types=default mandatory optional

The reason I mention this is because I wanted to install “Terminal emulator for the X Window System” (xterm) which is under the group “Legacy X Window System compatibility”. xterm happens to be an optional package and did not get installed until I added group_package_types=default mandatory optional to /etc/yum.conf.

# yum -y groupinstall "Legacy X Window System compatibility"

I did find a plug-in for yum that allows users to specify which package types within a package group should be installed when using yum groupinstall.

http://projects.robinbowes.com/yum-grouppackagetypes/trac

Enable GNOME

Since the server was previously running on CLI mode, we need to change the initialization process for the machine to boot up in GUI mode.

Open /etc/inittab using a text editor and change following line:

id:3:initdefault:

To:

id:5:initdefault:

After making the change, reboot the machine.

# init 6

Note that you can switch from GUI to CLI mode manually by using following method:

GUI to CLICtrl + Alt + F6
CLI to GUICtrl + Alt + F1

Installing Additional Applications

After logging in to the GNOME Desktop, you can now go to System > Administration > Add/Remove Software to manage application in CentOS.

By using this wizard, you can install various applications similar to yum but through a GUI. Applications installed using this method will appear in the Application menu list.