How To Protect NGINX Using Fail2Ban on Debian/Ubuntu
Overview: This guide shows how to ban IP addresses repeatedly causing certain HTTP errors in NGINX access log files, using...
Security
How to Create SSH Keys and Setup SSH Passwordless Authentication in Linux
Overview: This guide shows how to create SSH (Secure Shell) private and public keys and use them to connect to...
Fix “username is not in the sudoers file. ….” Error in Ubuntu
Overview: This guide shows how to fix the “username is not in the sudoers file. This incident will be reported”...
How To Securely Transfer Files/Directories to and from Remote Linux Servers
Overview: This guide shows how to securely transfer files to and from remote Linux servers using the scp command-line tool....
Difference Between sudo and su Commands in Linux
Both sudo and su are commands used in Linux and other Unix-based systems to switch to a different user account...
