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
Create Stratis File System (thin provision) with examples (CentOS/RHEL 8)
Stratis Architecture, Steps to create stratis file system with thin provision, create stratis pool, mounting stratis file system on rhel 8 linux with examples
Solved "error: Failed dependencies:" Install/Remove rpm with dependencies Linux
Learn how to install and remove rpm on Linux having multiple dependencies with and without yum. This can be performed online as well as offline depending upon …
Solved: Failed to restart network.service: Unit network.service not found in RHEL 8
Network scripts are deprecated in Red Hat Enterprise Linux 8 and they are no longer provided by default. In Red Hat Enterprise Linux 8, to run the ifup and the …
Solved: lvextend new size given (xx extents) not larger than existing size (xx extents)
The other day while trying to recover my LVM2 volume, I was doing some POC work and while using lvextend I encountered this error "New size given (XXX extents) …
How to disable tty or enable tty console in Linux ( RHEL / CentOS 7)
How to enable tty for more than 6 console. How to disable all the tty terminals in Linux. systemd disable tty. systemd enable tty using getty service in Linux.
10 practical examples to add or remove user from group in Linux
Linux add user to group. Linux remove user from group, remove multiple users from the group, remove users from multiple groups. list users in group Unix and …
How to restrict root user to access or modify a file and directory in Linux
Restrict and prevent access to root user for files and directories in linux using extended attributes chattr. Root and all users will be restricted to modify
Understanding nova compute architecture basics in Openstack (flow chart)
nova compute architecture , what is the role of nova-api, nova-scheduler, nova- console, nova-conductor, nova-console-auth, nova-compute service in OpenStack
RPM Downgrade in Linux (yum, rpm, Install Specific Version + Rollback)
Learn how to downgrade RPM packages in Linux using yum and rpm. This guide covers installing specific versions, handling dependencies, forcing downgrade, …
How to install and configure two node cluster in Linux ( CentOS / RHEL 7 )
How to install configure two node cluster in linux on centos rhel 7 using vmware virtualbox corosync-quorumtool two_node wait_for_all auto_tie_breaker
How to change IO scheduler permanently in Linux
Steps to change IO scheduler permanently in Linux using tuned profile and grub2 kernel or you can change IO scheduler using /sys/block/sdX/queue/scheduler
5 ways to check if server is physical or virtual in Linux or Unix
Commands to check if server is physical or virtual in Linux Unix. dmesg, lshw, hwinfo, dmidecode commands to check if server is physical or virtual remotely
Limit CPU with cgroups & slice in Linux [100% Working]
cgroup limit cpu, bash limit cpu usage, linux limit cpu usage examples. control cpu resources using slice and cgroup. restrict resources
How to change tmpfs partition size in Linux ( RHEL / CentOS 7 )
Increase decrease, change tmpfs partition size in Red Hat Linux 7, /run /run/user/$PID /dev/shm /sys/fc/cgroup using fstab RuntimeDirectorySize logind.conf
OpenStack Command Line Cheat Sheet (Beginner's Guide)
OpenStack command line cheat sheet for begineer. This CLI cheat sheet consists of Flavor, Identity, Compute Nova, Neutron Network, Block Storage, Guestfish