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May
13
2016
MySQL Update – MySQL Upgrade

MySQL Update – MySQL Upgrade

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MySQL update process some times create issues like, MySQL server doesn't start. when you perform MySQL update using yum update or yum update mysql or yum update mysql-server before restarting or stopping server  , you need to run command mysql_upgrade or mysql_upgrade -uroot -p MySQL Update Errors some time mysql server stop and doesn't start and you are unable to perform mysql_upgrade command, you get error like this in mysql logs  /var/log/mysqld.log [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it. Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' [ERROR] Fatal error: mysql.user table is damaged.…
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May
12
2016
Top Websites To Learn Ethical Hacking – 2016

Top Websites To Learn Ethical Hacking – 2016

Everybody wants to learn hacking in today’s age. However, this is not an easy task until you have basic knowledge about computers and network security. For beginners to know, there are two types of Hacking Ethical (White Hat) and Unethical (Black Hat). Unethical hacking is considered illegal while ethical hacking may be regarded as legal. We provide you with a list of websites that offers you white hat content. However, it is important to note that as a beginner to not perform any hacking & cracking tactics that breach any cyber law. Hackaday Hackaday is one of the top ranked…
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May
04
2016

Cisco UCS Networking

Cisco UCS Networking, Physical network architecture [vsw id="4ohGQUraFjE" source="youtube" width="425" height="344" autoplay="no"]   Cisco UCS Networking, Infrasctructure Virtualization [vsw id="ZL1V14kNBB8" source="youtube" width="425" height="344" autoplay="no"]   Cisco UCS Networking, Switching modes of the Fabric Interconnect [vsw id="kQ5Bu-Xx1s4" source="youtube" width="425" height="344" autoplay="no"]   Cisco UCS Networking, Upstream connectivity for SAN [vsw id="bindGcat5N8" source="youtube" width="425" height="344" autoplay="no"]   Cisco UCS Networking, Appliance Ports and NAS direct attach [vsw id="TNNiYTcvw8I" source="youtube" width="425" height="344" autoplay="no"]   Cisco UCS Networking, Fabric Failover with Hyper-V and bare metal OS [vsw id="OTp2HJaK09k" source="youtube" width="425" height="344" autoplay="no"]   Cisco UCS Networking, Fabric Failover with VMware [vsw id="DmcjPJbdqOg" source="youtube" width="425"…
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May
03
2016
Tripfez – an online travel agency catering to Muslims

Tripfez – an online travel agency catering to Muslims

Tripfez scores funding to focus on Muslim holidaymakers Tripfez, an online travel agency catering to Muslims, today announced it has raised US$750,000 in seed funding. China’s Gobi Partners and Malaysia’s Intres Capital led the round, while Douglas Khoo, co-founder of Chinese travel booking site Qunar, put in some cash. Tripfez, based in Malaysia, was set up in 2013 by co-founders Faeez Fadhlillah and Juergen Gallistl – two former schoolmates brought together by their mutual love of travel. In a nutshell, the company helps Muslim travelers discover, compare, and book hotels and tour services that fit their specific needs. The hotel…
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May
02
2016
KVM Installation on CentOS 6

KVM Installation on CentOS 6

KVM and CentOS 6 CentOS 6 has native availability of KVM virtualization support and tools in the base distribution.  See the meta packages contained in: # yum grouplist | grep -i virt 1. Host Setup Install all the packages you might need. yum -y install @virt* dejavu-lgc-* xorg-x11-xauth tigervnc \ libguestfs-tools policycoreutils-python bridge-utils If you have use any directories other than /var/lib/libvirt for kvm files, set the selinux context. In this example I use /vm to store my disk image files. semanage fcontext -a -t virt_image_t "/vm(/.*)?"; restorecon -R /vm Allow packet forwarding between interfaces. sed -i 's/^\(net.ipv4.ip_forward =\).*/\1 1/'…
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May
02
2016
NAS – Network Attached Storage

NAS – Network Attached Storage

Network Attached Storage (NAS) Network Attached Storage (NAS) devices are storage arrays or gateways that support file-based storage protocols such as NFS and CiFS, and are typically connected via an IP network. These file-based protocols provide clients shared access to storage resources. This centralization of shared storage resources reduces management complexity, minimizes stranded disk capacity, improves storage utilization rates and eliminates file server sprawl. Benefits of NAS NAS devices typically leverage existing IP networks for connectivity, enabling companies to reduce the price of entry for access to shared storage. The RAID and clustering capabilities inherent to modern enterprise NAS devices…
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May
02
2016
SAN – Storage Area Networks

SAN – Storage Area Networks

Storage Area Networks Storage Area Networks (SAN) are a separate computer network typically based on a fabric of fiber channel switches and hubs, connecting storage subsystems to a heterogeneous set of servers on an any-server-to-any-server basis. A SAN enables direct storage-to-storage inter-connectivity and lends itself to taking advantage of new types of clustering technology. Storage Area Network benefits include the following: Promotes high availability Improves data storage management and reduces costs Enables efficient hardware deployment and utilization Improves data backup efficiency and accessibility Enables storage virtualization Creating a Storage Area Network Thousands of companies have internally justified the value of…
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May
02
2016
SAN vs NAS – Storage Types Comparison

SAN vs NAS – Storage Types Comparison

SAN vs NAS SAN vs NAS, The primary difference between SAN and NAS solutions is the type of access protocol. NAS protocols such as NFS and CiFS provide shared file level access to storage resources. The management of the file system resides with the NAS device. SAN protocols such as iSCSI and fibre channel (FC) provide block level access to storage resources. Block level devices are accessed by servers via the SAN, and the servers manage the file system. Despite their differences, SAN and NAS are not mutually exclusive, and may be combined in multi-protocol or unified storage arrays, offering both file-level…
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Apr
15
2016
NfSen & NfDump Installation on CentOS for Netflow and sflow Collection

NfSen & NfDump Installation on CentOS for Netflow and sflow Collection

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nfdump was born out of a research network, requiring it to be able to consume huge amounts of flows efficiently. This makes it very powerful and very useful for nearly anyone. nfsen is really just a php wrapper for nfdump, however, the really nice thing about it (other then being free & opensource software) is that it is extendable via plugins. From botnet detection to displaying IP geo-data on a map, there is likely a plugin for it.  If you are not finding what you are looking for, you may write a plugin easily. The architecture to use for plugin…
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Apr
15
2016
Cyber crimes and their punishments

Cyber crimes and their punishments

Just in case you missed the news, National Assembly yesterday passed the cyber crime bill that is going to become a law once it’s approved by Senate and then authorized by President of Pakistan. At this point, when there are new laws relating to internet, smartphones and overall web, it is extremely important for you to know them or you can land yourself into a horrific situation unintentionally or out of ignorance. Read following carefully: Unauthorized access to anyone’s phone, laptop etc. can put you behind the bars for three months or a fine of Rs. 50,000 imposed or both Unauthorized copying…
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