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Linux lvm snapshot backup and restore tutorial RHEL/CentOS 7/8
Step by step guide linux lvm snapshot backup and restore with examples RHEL/CentOS 7/8. Create, merge, extend, remove LVM snapshot. backup root file system
6 easy steps to setup offline two factor authentication in Linux
Configure Google Authenticator with Offline two factor authentication to secure ssh, sudo and su using PAM module pam_google_authenticator.so in RHEL/CentOS 7/8 …
5+ practical examples to learn sticky bit in Linux
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" …
Tutorial: Beginners guide on Linux Memory Management
Understand various terminologies with linux memory management, dirty page, swapping, inactive, active memory, Translation Lookaside Buffers (TLB), page cache
How to PROPERLY Open Port in RHEL/CentOS Linux
Examples to open port in linux RHEL/CentOS 7/8 Use netstat to check port status. centos open firewall port. how to open and close ports. check if port is open