Zimbra by default, saves email for 5 days if the quota of a mailbox is exceeded. Zimbra then sends the email to the recipient if (during this time) the mailbox has space. This can be a huge problem if you have thousands of mailboxes. In this KB, we will drop an […]
Many times after changing the firmware of the disk or removing the disk/LUN’s without clean shutdown/unmount you may get the following error: /dev/sdf: read failed after 0 of 4096 at 0: Input/output error /dev/sdf: read failed after 0 of 4096 at 3298534817792: Input/output error /dev/sdf: read failed after 0 of […]
The exceeded num_locks in Podman occurs when the number of locks on a container exceeds the limit set in the configuration. To resolve this issue, We need to either increase the number of locks available to containers by updating the Podman configuration file or clean up the resources consumed by […]
Kubernetes cluster installation on Ubuntu can be sometimes very tough if you are new to Kubernetes but can be easy at the same time if you have all the details in one place step by step. This setup/ tutorial is designed to make your Kubernetes cluster installation journey easy and […]
In Linux, a user account is a unique identifier that is associated with a specific set of permissions and privileges. These permissions and privileges determine what actions the user can perform on the system, such as creating and modifying files, running programs, and accessing system resources. Each user account is […]
From macOS, Big Sur Apple is shipping zsh as the default shell but there is still an option available to use the bash shell. Most people still prefer bash shell over zsh shell due to multiple reasons. This tutorial guides the step-by-step process of changing the default shell to bash. […]
Telnet is one of the very useful tool to check the connectivity from the source machine to destination IP or URL. It is mostly used by SRE or network people to identify the connectivity issue. Sometimes developers also use telnet to check whether the application is properly reachable or not. […]
Kubectl is the tool that provides the functionality to manage the Kubernetes cluster in the backend it interacts with Kubernetes API servers and fulfills the user or administrator request. This cheat sheet provides the various option available under kubectl. Kubectl Autocomplete Kubectl Context and Configuration Creating Objects Viewing, Finding Resources […]
Kubeadm is one of all time favorite tool for installation of the Kubernetes. It comes directly from Kubernetes community and it is also a future of all kubernetes installation. This tutorial will guide how to Install Kubernetes Cluster on CentOS Environment: 2 CentOS 7 Servers with minimal installation Docker engine […]