Sometimes it is convenient to have user assigned names to network interfaces – particularly when the MAC address of the interface remains constant but the bus on which it is attached may change because it’s a virtual machine. All that is required to be done is create a file /etc/udev/rules.d/persistent-net.rules [...]

So I installed Ubuntu 20.04 on my laptop with encrypted root filesystem with bcache support since I have a NVME SSD along with the usual hard disk in it. While setting up encrypted root filesystem the installer will not allow you to have unencrypted swap – and the default encrypted [...]

I run a few PHP based applications which require background jobs, and I use the usual crond via crontab to run the jobs. PHP has an excellent feature – OpCache which can cache the compiled code in memory to speed up the web applications, where typically the PHP-FPM process is [...]

If you have used Ubuntu images on AWS, you might have noticed that the default username of the user on the instance is ‘ubuntu’. And the hostname is dynamically generated according to the public IP. Both of these can be changed using cloud-config supported on Ubuntu images – the config [...]

So I was working on automating some stuff using Ansible when the necessity to have password less superuser access came up. A simple way would be adding the ansible management key to the root account itself and allow SSH to root, but allowing ssh to root is usually a bad [...]