Saturday, June 8, 2013

Be Friendly to Google

Have you ever wondered why or how the search results from sites like CNET or Google Play/iTunes look so different from search results for your own website? That happens because Google 'understands' these sites better than yours. This is not to say that your site doesn't meet the 'quality criteria', so to speak. Rather, it merely means that Google can identify and understand the structure of such sites, and can provide a precise yet comprehensive and accurate overview for them. You can do that too by structuring the data/content on your website, so that search engines know exactly what your site is about. Based on your structured data, Google can show appropriate information on Google Now or Knowledge Graph. Imagine a review website where users write product reviews. You wouldn't them all to be treated the same way in search results now, would you? Structured Data will help Google provide searchers with accurate and interactive information they can easily relate to. This will not only help your website's CTR by a large degree, it will also build up your 'SEO-optimization points', meaning that search engines will be more hospitable for your website.

To help you participate in structured data features, Google has just recently released two news tools, the Data Highlighter, and the Structured Data Markup Helper tool.

Data Highlighter

The Data Highlighter basically helps identify what sort of content you have on your site, and teaches Google the pattern of structured data about events on your website. Using the Data Highlighter, you won't have to modify the HTML of your existing page. Start by logging into Google Webmaster Tools, and then from the left sidebar, go to Optimization >> Data Highlighter. Then click on the button on the right that says Start Highlighting.

The Data Highlighter basically helps identify what sort of content you have on your site, You can now tell Google whether your site is among the following types listed.
  • Articles
  • Events
  • Local Bussiness
  • Movies
  • Products
  • Restaurants
  • Software Applications
  • TV Programs
Then be asked to enter a URL, and then choose its type from among the eight ( 8 ) listed above. You can also choose to tag just that page, or other pages with the same consistent formatting too. The latter would be a good option for a blog, for example.

After this, you will see an overview of that page, and you will have to tag each part of the page with your mouse. You can, for example, specify the author, the publishing date, and the average rating for an article. Tagging options vary depending upon what option you chose (i.e. Article, Product etc).

The process will take a few minutes, at the end of which the content will be 'highlighted' automatically. 

Structured Data Markup Helper

As an alternative to the Data Highlighter where you let Google do the work for you, you can use the Structured Data Markup Helper tool to edit your HTML, and optimize your site using the markup generated by Google (for advanced users). 

It works in much the same way as Data Highlighter. You first have to tag various page elements with your mouse. Then, this tool will generate sample HTML code for you with microdata markup included. You can use this code as a reference for implementing structured data directly into your site's source code. Using these tools, you can really stand out from the competition. You can tell Google exactly what your website is about, and we think these tools are a huge step forwards. 

Thursday, June 6, 2013

Samba as Primary Domain Controller

Installation of Samba First ( Open a Window Terminal )

[root@linux10 ~]#apt-get install samba   

Configure Samba by editing /etc/samba/smb.conf.
My smb.conf file is shown below. Make changes according to your requirement needed.

[root@linux10 ~]#vi /etc/samba/smb.conf  

#================= Global Settings ==================

## Browsing/Identification ###

# Change this to the workgroup/NT-domain name your Samba server will part of
workgroup = <name>

# server string is the equivalent of the NT Description field
server string = %h server (Samba, Ubuntu)

# Windows Internet Name Serving Support Section:

# WINS Support – Tells the NMBD component of Samba to enable its WINS Server
# wins support = no

# WINS Server – Tells the NMBD components of Samba to be a WINS Client

# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
; wins server = w.x.y.z

# This will prevent nmbd to search for NetBIOS names through DNS.
dns proxy = no

# What naming service and in what order should we use to resolve host names

# to IP addresses
; name resolve order = lmhosts host wins bcast

#### Networking ####

# The specific set of interfaces / networks to bind to

# This can be either the interface name or an IP address/netmask;

# interface names are normally preferred

; interfaces = eth0

# Only bind to the named interfaces and/or networks; you must use the

# ‘interfaces’ option above to use this.

# It is recommended that you enable this feature if your Samba machine is

# not protected by a firewall or is a firewall itself. However, this

# option cannot handle dynamic or non-broadcast interfaces correctly.

; bind interfaces only = yes

#### Debugging/Accounting ####

# This tells Samba to use a separate log file for each machine
# that connects

log file = /var/log/samba/log.%m
# Cap the size of the individual log files (in KiB).
max log size = 1000

# If you want Samba to only log through syslog then set the following
# parameter to ‘yes’.
# syslog only = no

# We want Samba to log a minimum amount of information to syslog. Everything
# should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log
# through syslog you should set the following parameter to something higher.
syslog = 0

# Do something sensible when Samba crashes: mail the admin a backtrace
panic action = /usr/share/samba/panic-action %d

####### Authentication #######

# “security = user” is always a good idea. This will require a Unix account
# in this server for every user accessing the server. See
# /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/ServerType.html
# in the samba-doc package for details.
security = user

# You may wish to use password encryption. See the section on
# ‘encrypt passwords’ in the smb.conf(5) manpage before enabling.
encrypt passwords = true

# If you are using encrypted passwords, Samba will need to know what
# password database type you are using.
passdb backend = tdbsam

obey pam restrictions = yes

# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.

unix password sync = yes

# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Ian Kahan < for
# sending the correct chat script for the passwd program in Debian Sarge).
passwd program = /usr/bin/passwd %u
passwd chat = *Entersnews*spassword:* %nn *Retypesnews*spassword:* %nn *passwordsupdatedssuccessfully* .

# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# ‘passwd program’. The default is ‘no’.

pam password change = yes

# This option controls how unsuccessful authentication attempts are mapped
# to anonymous connections
map to guest = bad user

########## Domains ###########

# Is this machine able to authenticate users. Both PDC and BDC
# must have this setting enabled. If you are the BDC you must
# change the ‘domain master’ setting to no
domain logons = yes
domain master = yes
local master = yes
preferred master = yes
os level = 64
# The following setting only takes effect if ‘domain logons’ is set
# It specifies the location of the user’s profile directory
# from the client point of view)
# The following required a [profiles] share to be setup on the
# samba server (see below)
; logon path = \%Nprofiles%U

# Another common choice is storing the profile in the user’s home directory
# (this is Samba’s default)
logon path = \%N%Uprofile

# The following setting only takes effect if ‘domain logons’ is set
# It specifies the location of a user’s home directory (from the client
# point of view)
logon drive = H:
logon home = \%N%U

# The following setting only takes effect if ‘domain logons’ is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in ‘DOS’ file format convention
; logon script = logon.cmd

# This allows Unix users to be created on the domain controller via the SAMR
# RPC pipe. The example command creates a user account with a disabled Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser –quiet –disabled-password –gecos “” %u

# This allows machine accounts to be created on the domain controller via the
# SAMR RPC pipe.
# The following assumes a “machines” group exists on the system
add machine script = /usr/sbin/useradd -g machines -c “%u machine account” -d /var/lib/samba -s /bin/false %u

# This allows Unix groups to be created on the domain controller via the SAMR
# RPC pipe.
; add group script = /usr/sbin/addgroup –force-badname %g

########## Printing ##########

# If you want to automatically load your printer list rather
# than setting them up individually then you’ll need this
# load printers = yes

# lpr(ng) printing. You may wish to override the location of the
# printcap file
; printing = bsd
; printcap name = /etc/printcap

# CUPS printing. See also the cupsaddsmb(8) manpage in the
# cupsys-client package.
; printing = cups
; printcap name = cups

############ Misc ############

# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
; include = /home/samba/etc/smb.conf.%m

# Most people will find that this option gives better performance.
# See smb.conf(5) and /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/speed.html
# for details
# You may want to add the following on a Linux system:
# socket options = TCP_NODELAY

# The following parameter is useful only if you have the linpopup package
# installed. The samba maintainer and the linpopup maintainer are
# working to ease installation and configuration of linpopup and samba.
; message command = /bin/sh -c ‘/usr/bin/linpopup “%f” “%m” %s; rm %s’ &

# Domain Master specifies Samba to be the Domain Master Browser. If this
# machine will be configured as a BDC (a secondary logon server), you
# must set this to ‘no’; otherwise, the default behavior is recommended.
# domain master = auto

# Some defaults for winbind (make sure you’re not using the ranges
# for something else.)
; idmap uid = 10000-20000
; idmap gid = 10000-20000
; template shell = /bin/bash

# The following was the default behavior in sarge,
# but samba upstream reverted the default because it might induce
# performance issues in large organizations.
# See Debian bug #368251 for some of the consequences of *not*
# having this setting and smb.conf(5) for details.
; winbind enum groups = yes
; winbind enum users = yes

# Setup usershare options to enable non-root users to share folders
# with the net usershare command.
# Maximum number of usershare. 0 (default) means that usershare is disabled.
; usershare max shares = 100

# Allow users who’ve been granted usershare privileges to create
# public shares, not just authenticated ones
usershare allow guests = yes

#================ Share Definitions =================

# Un-comment the following (and tweak the other settings below to suit)
# to enable the default home directory shares. This will share each
# user’s home directory as \serverusername
comment = Home Directories
browseable = no
writeable = yes

# By default, the home directories are exported read-only. Change the
# next parameter to ‘no’ if you want to be able to write to them.
; read only = yes

# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
; create mask = 0700

# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
; directory mask = 0700

# By default, \serverusername shares can be connected to by anyone
# with access to the samba server. Un-comment the following parameter
# to make sure that only “username” can connect to \serverusername
# This might need tweaking when using external authentication schemes
; valid users = %S

# Un-comment the following and create the netlogon directory for Domain Logons
# (you need to configure Samba to act as a domain controller too.)
comment = Network Logon Service
path = /home/samba/netlogon
guest ok = yes
read only = yes
share modes = no

# Un-comment the following and create the profiles directory to store
# users profiles (see the “logon path” option above)
# (you need to configure Samba to act as a domain controller too.)
# The path below should be writable by all users so that their
# profile directory may be created the first time they log on
comment = Users profiles
path = /home/samba/profiles
guest ok = no
browseable = no
create mask = 0600
directory mask = 0700

comment = All Printers
browseable = no
path = /var/spool/samba
printable = yes
guest ok = no
read only = yes
create mask = 0700

# Windows clients look for this share name as a source of downloadable
# printer drivers
comment = Printer Drivers
path = /var/lib/samba/printers
browseable = yes
read only = yes
guest ok = no

# Uncomment to allow remote administration of Windows print drivers.
# You may need to replace ‘lpadmin’ with the name of the group your
# admin users are members of.
# Please note that you also need to set appropriate Unix permissions
# to the drivers directory for these users to have write rights in it
; write list = root, @lpadmin
# A sample share for sharing your CD-ROM with others.
; comment = Samba server’s CD-ROM
; read only = yes
; locking = no
; path = /cdrom
; guest ok = yes

# The next two parameters show how to auto-mount a CD-ROM when the
# cdrom share is accesed. For this to work /etc/fstab must contain
# an entry like this:
# /dev/scd0 /cdrom iso9660 defaults,noauto,ro,user 0 0
# The CD-ROM gets unmounted automatically after the connection to the
# If you don’t want to use auto-mounting/unmounting make sure the CD
# is mounted on /cdrom
; preexec = /bin/mount /cdrom
; postexec = /bin/unmount /cdrom

Save the file.

Create a group named machines.
Create the netlogon directory for Domain Logons.
Create the profiles directory to store users profiles.
Set permission on profiles directory.

[root@linux10 ~]#groupadd -g 201 machines                     
[root@linux10 ~]#mkdir -m 0775 /home/netlogon                 
[root@linux10 ~]#mkdir /home/samba /home/samba/profiles       
[root@linux10 ~]#chmod 1757 /home/samba/profiles              

Create users, passwords and smbpasswords.

[root@linux10 ~]#useradd -m <name>                            
[root@linux10 ~]#passwd <password>                            
[root@linux10 ~]#smbpasswd -a <password>                      
[root@linux10 ~]#useradd -m <name>                            
[root@linux10 ~]#passwd <password>                            
[root@linux10 ~]#smbpasswd -a <password>                      

Restart Samba Service

[root@linux10 ~]#service smbd restart                  

Tuesday, June 4, 2013

Best Software for Server Monitoring

1. Hyperic HQ
*Hyperic is the exclusive company for providing native management for Unix, Linux, Windows and Mac natively
*Hyperic HQ efficiently manages any operating system, web server, app server and database server
* Hyperic provides the most scalable systems monitoring and management software available in open-source with Hyperic HQ 3.2.

*Nagios has a web interface that helps users check network health from anywhere
*reates reports on trends, availability, alerts, notifications — via the web interface
*Monitors network redundancies and failure rates.

3.Zabbix 1.8
*Further, ZABBIX combines both monitoring and trending functionality, while Nagios focuses exclusively on monitoring
*The Web monitoring function of ZABBIX allows users to monitor the availability and performance of web-based services over time. Moreover, this functionality allows ZABBIX to log into a web application periodically and run through a series of typical steps being performed by a customer

4.SolarWinds – Orion Network Performance Monitor 10.1
*SolarWinds’s ConnectNow Topology Mapping allows users’ environment to be mapped in real time automatically. This provides graphical visibility into users’ networks, requiring no additional work or tools
*SolarWinds’s Integrated Wireless Poller monitors wireless devices for security and other issues and reduces the difficulty in managing these items, allowing more widespread use of wireless technologies

5.ManageEngine OpManager
*Easy to install and needs no special requirements
*Offers various facilities, including incident management, problem management, and a change management facility.
*Provides powerful SLA features through Manage Engine Service Desk.

6.GFI Network Server Monitor
*Monitors network and servers for software and hardware failures
*Monitors Exchange, ISA, SQL and Web servers
*Easy to learn and use;

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