This article help you to find virtualization type of an Instance and AMI. I used awscli commands to demonstrate. The same details can be obtained from console too.
reassign private IP address – AWS
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.
Ubuntu – List available package updates
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.
Boot previous kernel version – Ubuntu 16.04
The one who new to Ubuntu like me may face difficulty in understanding grub.cfg. But making Ubuntu to boot into older or previous kernel version is really simple. The configuration is same like Redht except small change in syntax.
Get execution time of each task – Ansible
Ansible can report execution time for each task. And total time taken for playbook execution. It is more useful to estimate the time of completion as specially for long running jobs.
monitor wordpress site through bash script
Have created a small bash script to monitor wordpress site status and report to the web admin in near real time. I really enjoyed the benefit of outcome of this script. What it does?
WordPress website page not loading
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?
Linux – How to fix high I/O wait issue?
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?
Linux – delete the LUN and remove traces from OS
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.
How to delete Oracle ASM Disk in RHEL 5 & 4
ASM is the volume manager and filesystem for Oracle database. At one point of time may need to drop the disks. The procedure is quite different compare to Linux LVM disks. How to delete Oracle ASM disk in RHEL 5 and RHEL 4?