How to switch boot target to text or GUI in systemd Linux
Most modern Linux distro uses systemd as init replacement. It is a suite of basic building blocks for Linux distros such as RHEL/CentOS & co, OpenSUSE/SUSE, Fedora, Arch, Debian, Ubuntu, …
How To Check The Runlevel In Linux
This brief guide explains what is a runlevel, how many runlevels are there in Linux and how to check the runlevel in Linux operating systems. What is runlevel? A runlevel is one …
How to restart systemd without rebooting Linux when critical libraries installed
Whenever we update a critical library such as OpenSSL, we need to restart any daemons that use the library. Systemd with PID 1 itself also uses OpenSSL. How do you …
Find When A Specific Linux Kernel Version Is Last Booted
You should have installed or upgraded to many new Kernel versions over the time in your Linux machine. If you have multiple Linux Kernels installed on your system, how would …
How to enable rc.local shell script on systemd while booting Linux system
We can easily enable rc.local shell script support on systemd while booting the Linux system. Traditionally, the shell script /etc/rc.local used by developers and Linux sysadmin to call other scripts …
How To List Startup Services At Boot In Linux
By default, some important system services are started automatically when the system boots. For instance, the NetworkManager and Firewalld services will be automatically started at system boot. The startup services …
How to view status of a service on Linux using systemctl
How do I use the systemctl command to view status of a systemd service on Linux operating systems?We use systemctl status command under systemd to view the status of the …
How To Check If A Linux System Is Physical Or Virtual Machine
As a Linux administrator, sometimes you might be wondering whether you are working on a physical or virtual machine. Most of the time, you will be accessing and managing your …
Boot Into Rescue Mode Or Emergency Mode In Ubuntu 20.04 / 18.04
As you might already know, Runlevels are replaced with Systemd targets in many recent Linux distributions like RHEL 7 / RHEL 8 and Ubuntu 16.04 LTS and newer versions. For …
[Linux Tips] Disable Suspend And Hibernation
I’ve learned many simple and quick Linux tips and tricks over the past few years and decided to share one at a time via our blog. Today we are going …