Security
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 …
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
How to check security updates list & perform linux patch management RHEL
Perform Linux patch management in RHEL 6/7/8 Linux in LIVE production environment. Identify vulnerabilities list and security updates list then apply patch
Difference between /dev/tty and /dev/pts (tty vs pts) in Linux
What is the difference between /dev/pts and /dev/tty. Why do I get /dev/pts instead of /dev/tty on my Linux terminal. TTY vs PTS. /dev/tty vs /dev/pts.
Install & Configure OpenVPN Server Easy-RSA 3 (RHEL/CentOS 7) in Linux
Install and configure openvpn server and openvpn client with easy-rsa 3 in centos or rhel 7 linux. Create CA, CSR certificates for openvpn server client model.