Introduction Two-factor authentication (2FA) is an authentication method that requires entering more than one piece of information to successfully log in to an account or device. In addition to entering a username and password combination, 2FA requires the user to enter an additional piece of information such as a one-time password (OTP), like a six-digit
SSH (Secure SHELL) is an open source and most trusted network protocol that is used to login into remote servers for execution of commands and programs. It is also used to transfer files from one computer to another computer over the network using secure copy (SCP) Protocol. The below article clearly explains, how to generate
Each attempt to login to SSH server is tracked and recorded into a log file by the rsyslog daemon in Linux. The most basic mechanism to list all failed SSH logins attempts in Linux is a combination of displaying and filtering the log files with the help of cat command or grep command. In order
I am always fascinated by the things going on behind the scenes when I boot a Linux system and log on. By pressing the power button on a bare metal or starting a virtual machine, you put in motion a series of events that lead to a fully-functional system – sometimes in less than
You can send out an “alert” email when someone logs in to your server (or workstation) by taking two steps*. Step 1) is done by placing this script into a file named “iloggedin” the /usr/local/sbin/ directory, and making it executable with chmod +x /usr/local/sbin/iloggedin. While you are creating the file, make sure to modify the
