Linux Tutorials and Command Line Guides
Learn Linux with step-by-step tutorials, command line examples, and system administration guides for Ubuntu, RHEL, CentOS, and more.
Welcome to the Linux tutorials section, your complete resource for mastering Linux commands and system administration.
This category covers everything from basic commands to advanced system-level operations across multiple distributions such as Ubuntu, RHEL, and CentOS.
Linux is the backbone of modern infrastructure, and understanding it is essential for DevOps, cloud computing, and system administration. You may also explore System Administration and Security for advanced topics.
What you will learn
- Essential Linux commands and tools
- File system and process management
- User and permission management
- Real-world troubleshooting techniques
Ideal for
- Beginners learning Linux
- System administrators
- DevOps engineers
331 articles
How to PROPERLY check memory usage per process in Linux?
Check memory usage per process in Linux using top, ps, smem tool. This will give memory usage detail of all the process / application running on Linux
How to configure PXE boot server in Linux ( CentOS / RHEL 7 )
Step by step guide to configure PXE boot server using dnsmasq, dhcp, http, tftp- server in CentOS / RHEL 7 Linux using kickstart to automate the installation
Understanding resource group and constraints in a Cluster with examples
Understand resource group and constraints with examples in Cluster. Different types of constraint, adding existing resource to group, High Available Cluster
Guide to troubleshoot Cluster Resource (RHEL / CentOS 7)
Configure high availability cluster, create cluster resource and troubleshoot cluster resource for a cluster on Red Hat / CentOS 7 with examples.
Understanding High Availability Cluster and Architecture
Understand thearchitectecture of different kinds of cluster i.e. high performance, load balancing and high availability cluster in Red Hat Linux
How to exit full screen mode in qemu virt-manager ( RHEL / CentOS 7)
How to exit full screen mode in qemu virt-manager for kvm hosts or get out of fullscreen. This article is validated on RHEL / CentOS 7 Linux on vnc viewer.
How to protect GRUB2 from booting kernel without password in Linux
Learn to set password to protect grub2 from booting a kernel without password. in rhel 7.To set password and protect grub2 remove unrestricted in menuentry
How to set GRUB2 password using grub2-setpassword (RHEL / CentOS 7)
Steps to set grub2 password using grub2-setpassword for unautorized modification of grub2 entries. Also steps to remove grub2 password from rhel /centos 7
Linux Boot Process Explained Step by Step in Detail
Get detailed description of Step by Step Guide of Linux boot process with flowchart diagram. This also is the most asked question in interviews in Linux.
How to download rpm package and all dependencies (RHEL / CentOS 7)
Download rpm package and all dependencies in CentOS / RHEL 7 using yumdownloader or repotrack. You can also use repoquery with yumdownloader to download rpm
How to download entire repository from CentOS /RHEL 7/8 for offline use?
To download entire repository from CentOS / RHEL 7 you will need one time access to Internet. Next you can sync the online repository to your local system
define ephemeral disk in OpenStack and compare with persistent storage
Define ephemeral storage. Difference between root disk vs ephemeral disk in openstack? Ephemeral storage is non persistent storage unlike cinder swift storage.
How to configure ipv6 address in Linux (RHEL / CentOS 7/8)
Configure IPv6 address using Network Manager (nmtui), CLI, Modify existing IPv6 address using nmci on Linux (RHEL / CentOS 7), Best practices for IPv6 usage
How to configure bridged network in virt-manager (CentOS / RHEL 7)
Steps to configure bridged network in virt-manager. Virtual Machine Manager provides a graphical tool for administering virtual machines for KVM, Xen etc
How to create or configure network bridge in CentOS / RHEL 7/8
configure network bridge by this step by step guide on CentOS or RHEL 7 linux, configure network bridge using NetworkManager TUI, nmtui.