Author Archives: Amr Mostafa

Upgrade Grandstream IP phones

One of my responsibility in my job ensure IP phones software is up to date and fix all bugs in software. If you want to update ensure to ┬áread the “change log” of the product and ensure from the firmware … Continue reading

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Zabbix Network Monitoring Essentials – book review

  since one year and half my manager asked from me to monitoring the infrastructure. After using many of monitoring tools. I decided to use zabbix to monitor. After Long time from studying and trying monitoring and network management but … Continue reading

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How install Zabbix 2.2.x on Centos 6

What is Zabbix ? Zabbix is an enterprise-class open source distributed monitoring solution. Zabbix is software that monitors numerous parameters of a network and the health and integrity of servers. Zabbix uses a flexible notification mechanism that allows users to … Continue reading

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RHCSA Version 7

I decide after 4 years of using Linux as user to system administrator. I decide to prepare to RHCSA ( RedHat Certified System Administrator) version 7. Exam Objectives of Certification is Understand and use essential tools   Access a shell … Continue reading

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SDN Form Georgia Institute of Technology

Course “Software Defined Networking” starts on coursera after 4 days from now by Dr. Nick Feamster This course introduces software defined networking, an emerging paradigm in computer networking that allows a logically centralized software program to control the behavior of … Continue reading

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Transmission unable to save resume file permission denied

The problem when you open any torrent file and after few seconds appear error massage “unable to save: resume file permission denied” solve this problem, change the owner and group of user config transmission folder open your terminal and write … Continue reading

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install Qemu 0.11 for GNS3

After install GNS3, you need to install patched qemu to run virtualized hosts to integrate with your Lab. First Qemu Patch/Compilation part 1- Install Dependences # yum install -y ncurses ncurses-devel zlib zlib-devel SDL SDL-devel libpcap libpcap-devel wget   2- … Continue reading

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