reassign private IP address – AWS

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Each AWS instance comes with one primary private IP address assigned to first network interface named eth0. This primary IP address will remains unchanged throughout the life-cycle of that instance. AWS also allows assigning multiple secondary private IP address for same network interface. Re-allocating or Reassigning secondary addresses can be done straight away either through console or CLI. Continue reading “reassign private IP address – AWS”


Ubuntu – List available package updates

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Ubuntu package manager has multiple tools to list the available package updates for installed deb packages. Look into all options and choose the one which you feel comfort. Among given options, first two option are my favourite. Because they populate list of available package updates with version details. Continue reading “Ubuntu – List available package updates”


WordPress website page not loading

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Q: Our wordpress website hosted on Linux + Apache + MySQL. Here the issue is page not loading at all. Have did restart the apache server. Then it worked well for few seconds. Again the page stopped loading. All of my clients have seen server unreachable error. There was no configuration change been done in wordpress site. All of us sudden it happened. How to fix it quickly and make my website available to users? Continue reading “WordPress website page not loading”


Linux – How to fix high I/O wait issue?

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Linux server does not responding to application queries. The performance is too low. Underlying disks or SAN LUN’s are normal. From top output found the I/O wait is too high. But there is no I/O intensive tasks are running. While, How to fix high I/O wait issue? Continue reading “Linux – How to fix high I/O wait issue?”


Linux – delete the LUN and remove traces from OS

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In my previous article explained about how to delete disk from ASM library. In this article will learn to delete the LUN and remove traces from server. This article applicable for deleting ASM disk, standard partitioned disk and LVM physical volume. These steps works well for Redhat and SUSE. Continue reading “Linux – delete the LUN and remove traces from OS”


AIX – Install awscli exclusively to current user

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On AIX platform, How to install awscli only to current user? In case non-privileged user, Is it possible for the user to do without sudo privileges?

The answer is big fat YES. It is absolutely possible. The AWS documentation may work well for other distribution. But for AIX, it requires to pass few extra arguments along with pip installer. Continue reading “AIX – Install awscli exclusively to current user”