Category Archives: Information Technology

Cloudkick customed plugins for windows

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Cloudkick which is part of RackSpace provides Agent based monitoring for external servers and cloud servers. Other than monitoring computer resources such as CPU, memory, HDD utilization. It is able to cater for customed check which is known as customed plugin. In other words, Cloudkick offers limitless way of administrator to monitor their IT assets as host level which is limited to the operating systems shell scripting support as well as limited to the creativity of the scripters.

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Automating ossec installation in linux

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One of the challenges that I have faced in linux environment were to automate installation.

Of course it is simple to script using bash in linux to run rpm or deb binary installation.

What if the installation comes with an interactive installation or installer which is coded as a bash script. Yes, I am looking at you OSSEC .

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Generating RSA key using Linux or Ubuntu

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For linux or ubuntu user who is lazy to login to remote by typing password or plainly to improve security measure. You may generate a RSA key type to authenticate the login process. Generating the RSA key is the very first step.

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Connect to SSH using customed port from UBuntu Terminal

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Scope and conditions :

  1. SSH service is running on remote server.
  2. SSH is binded to IP address 10.10.10.10.
  3. SSH service is running on Port 9394 or customed port (SSH default port 22).
  4. There is no firewall on your computer or your network. Continue reading →

Not enough space in tmp due to eaccelerator

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OS : Linux CentOS 5, cPanel® 11.24

Problem :

a. Centos /tmp keeps on getting full, culprit identified is EAcclerator.
b. Production server that needs minimal down time minimal changes.

Scope :

a. OS is CentOS 5.2 redhat
b. /var has more than 4GB free space
c. Have administrator and root access

Possible solution :

a. Recompile Apache with EAccelerator disabled.
b. Create cron to clear to clear space in regular interval.
c. Create a customed script that clears EAccelerator cache at regular interval.

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Nuts about NAT

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Unlike actual mailing or house addresses, public IP addresses is more easily depleted.

Each host in a computer network or Internet in this case, requires public IP address to identify itself in the Internet. IP Simplified : It is used as a unique Identity for computers to communicate and interact in the Internet.

IP Address is a highlighted on the first statement is getting more rare. Due to this limitation, many users needs to share a single Internet public IP… Continue reading →