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 install EPEL repo in RHEL 8 Linux
Steps to install EPEL repo in RHEL 8 or CentsOS 8. How to Fix "Failed to synchronize cache for repo 'epel', ignoring this repo" error in EPEL
3 easy steps to configure hugepages in RHEL/CentOS 7/8
Step-by-Step Tutorial to configure hugepages in red hat and centos 7/8 linux using vm nr_hugepages in /etc/sysctl.conf. Also configure hugepages pool using …
How to check Transparent HugePage status in Linux?
Steps to check transparent hugepage status with examples for AnonHugePages and Explicit hugepage (nr_hugepages) if they are enabled or disabled in RHEL/CentOS 7 …
Check if CPU supports HugePages & change default hugepage size in RHEL
Learn how to check if CPU supports HugePages with 2MB and 1GB Size in CentOS/RHEl 7 Linux and change default hugepage size permanently using GRUB2 with examples …
How to check Transparent HugePage usage per process in Linux with examples
Steps to check transparent hugepage usage per process in Linux with examples. Calculate Transparent HugePage (AnonHugePages) system wide processes in Linux
How to generate sosreport in rescue mode on Software RAID (RHEL/CentOS 7)
How to generate sosreport in rescue mode linux. Fix sosreport command not found. Boot using RHEL/CentOS DVD to rescue mode in linux with software raid linux
How to suppress sysctl: reading key net.ipv6.conf.all.stable_secret in Linux
Steps to suppress sysctl: reading key "net.ipv6.conf.all.stable_secret" message while running sysctl -a to grep a value from STDOUT with example in Linux
How to set up proxy for yum repository in Linux?
I will share examples to set up proxy for yum repository in Linux. Modify yum.conf or /etc/yum.repos.d to set proxy for yum repositories.
Set up proxy using http_proxy & https_proxy environment variable in Linux?
How to set up proxy on Linux using http_proxy and https_proxy environment variable. Export the variables or set using /etc/environment and /etc/profile.d script …
Unregister RHEL 7 using Subscription Manager and Remove System Profile
Unregister RHEL 7 from Red Hat Network using subscription manager and remove system profile. subscription-manager unregister, clean to remove subscription data
Register RHEL 7 host to RHN using subscription manager (with or without proxy)
Register RHEL 7 system to Red Hat Satellite Network using subscription manager. Attach pool, enable and disable repositories with or without proxy in RHSM.conf
Fix 'there are no enabled repos' & create local repository in RHEL 7 & 8;
Create local repository using yum and dnf in RHEL 7 and 8 Fix there are no enabled repos Perform yum install without subscription. Create Offline yum repo Linux …
Secure Master Slave DNS Server with DNSSEC key in Linux (RHEL/CentOS 7)
Steps to secure master slave dns server using various algorithm types to secure the data replication between master and slave dns server using dnssec key Linux
Rpmbuild | Create rpm package | Build rpm from source code
Step-by-Step Tutorial to create rpm package from scratch in Linux and build rpm from source code using rpmbuild RHEL/CentOS. Make rpm package
Create Stratis Snapshot, Restore Stratis FileSystem & more (CentOS/RHEL
Steps to create stratis snapshot, restore stratis file system, remove or destroy snapshot, pools, stratis file systems using examples in RHEL 8 Linux