Deepak Prasad

Learn how to refresh network settings in Ubuntu after IP address, route, DNS, DHCP, Netplan, NetworkManager, or systemd-networkd changes. Includes safe remote-server workflow, tested verification commands, and practical …

Learn how to configure a VNC server on Ubuntu with TigerVNC, XFCE, a per-user VNC password, localhost-only binding, SSH tunneling, firewall checks, and a systemd service for persistent remote desktop access.

Learn what systemd is in Linux and how to use systemctl to check system state, list services, inspect units, view targets, read logs, verify unit files, and test transient services with practical tested examples.

Learn how to add a user to sudoers safely with visudo, sudoers.d drop-in files, command-specific rules, NOPASSWD examples, syntax checks, aliases, and tested sudo -l verification output.

Learn how to check Linux kernel version with tested uname, hostnamectl, procfs, journalctl, dmesg, boot image, dpkg, and apt commands, and understand the difference between the running kernel and installed kernel …

Learn how to list disks in Linux and check disk type, HDD or SSD status, transport interface, model, serial number, partition table, and filesystem details with tested lsblk, sysfs, udevadm, lspci, lshw, fdisk, parted, …

Tested Linux commands to check thread count per process using proc task directories, proc status, ps NLWP/LWP, ps -T, top -H and pstree, plus system thread limits.

Tested Linux commands to show hidden files with ls, list only hidden files, find hidden files recursively, and check hidden file or directory size with du.

Learn how to check Ubuntu version from the command line or GUI. Use lsb_release, /etc/os-release, hostnamectl, /etc/issue, or Settings to find your Ubuntu release, version number, codename, and kernel.

commands to copy file from one server to another in Linux or Unix with examples using sftp scp rsync sshfs nfs. copy using shell script between two machine

How to update crond using a shell script? Schedule cron job using command line bash shell script in Linux? Create cron job using crontab shell script Unix

How to extract/unpack/uncompress the contents of the initramfs image on RHEL7 and RHEL8? How do I list initramfs image file content? How do I modify the contents of an initrd or initramfs? How do I view an initrd or …

In this article we learned how to properly perform a curl POST request with practical examples

There are two different versions of pip which you can install to solve the error i.e. pip command not found in Ubuntu 20.04 Linux. Step by Step instructions to fix pip command not found error.

To create custom ISO in RHEL/CentOS 8, create a kickstart file and modify the isolinux.cfg for boot menu. You can also minimze the package list and update repodata

Steps to backup partition in LInux, clone your partition or hard drive, logical volume using fsarchiver Exclude files and directories encrypt backup

Learn how to check internet connectivity from the Linux command line using tested ping, curl, wget, DNS, route, netcat, telnet, and Bash script examples with sample output.

This tutorial will guide you through step by step instructions to install ImageMagick on Ubuntu, covering various methods like APT and compiling from source. We'll also explore basic usage, including image conversion and …

Discover how to add user to group in Linux using various methods like usermod, gpasswd, and adduser. Efficiently manage permissions and access control with these essential techniques.

Step by Step tutorial to configure samba active directory domain controller in CentOS 8 Linux. Install Windows AD alternative in Linux. Free domain controller software in Linux

How to use tar --strip-components and zip --junk-paths with examples to strip absolute path in Linux and Unix. Force unzip / zip not to create a subdirectory

Step by Step NFS configuration Guide to install and configure NFS server in RHEL/CentOS 7/8. NFS server tutorial. How to check NFS status in Linux. setup nfs server

What is Unix or Linux Sticky Bit special permission. How to apply sticky bit for directories and files. What is the difference between small 't' and capital "T"

Learn about tar incremental backup with examples in Linux. You can use tar incremental backup script to automate tasks for backup and recovery in Linux/Unix

check last password change date in Linux check password expiration, check password status of system and active directory user. chage command examples.

Part 2 of 3: extend a DemoApp Operator SDK project with ConfigMap, Service, Deployment, status Conditions, finalizers, drift via Owns/Watches, mutating/validating webhooks, Events, and RBAC markers.

Part 1 of 3: scaffold a Go operator with Operator SDK (go/v4), CRDs from Kubebuilder markers, RBAC, idempotent Reconcile with CreateOrUpdate, owner references, and deploy to kind.

Server-Side Apply (SSA) is the modern way for operators to express ownership of fields in a Kubernetes object. Instead of doing a full Update with a stale copy of the object, the operator sends only the fields it cares …

Multi-tenant operators come in three shapes: one operator serving all tenants (shared, simple, weakest isolation), one operator per tenant (isolated, expensive, strongest isolation), and the hybrid — one operator binary …

A complete guide to running a multi-replica Kubernetes operator with leader election: how the lease-based lock works, the four manager options (`LeaderElection`, `LeaderElectionID`, `LeaderElectionResourceLock`, …