Linux: Get Number of Days since 1970
Calculate or get the number of calendar days since 1970 on Linux using the date command.
Linux: Script to Partition Disk
Learn how to automate the partitioning of a disk using fdisk, parted and sfdisk on Linux.
Linux: Check User Password Expiry Time
Explains how to check user account password expiry information on Linux.
Unix / Linux: Manage Multiple SSH Keys
Manage multiple ssh private keys and configure ssh to map different private keys to different hosts automatically by using ~/.ssh/config configuration file
Linux: TOTP Password Generator
Explains how to generate TOTP one-time passwords on Linux using oathtool.
Linux: Get WM_CLASS of Window
Explains how to retrieve the WM_CLASS property of a window on Linux and also how to manually define the WM_CLASS property in desktop files using StartupWMClass field.
Unix / Linux: Kick User Off SSH
Explains how to kick a user off a Unix or Linux system by using who, ps and kill commands.
Unix / Linux: How to Create Zombie Process
Explains how zombie processes or defunct processes are created on Unix / Linux. Also explains how the zombie process can be removed from the process table. A simple C program is used to demonstrate the creation of zombie processes.
Linux: Run Cron Job on Reboot
Explains how to schedule a cron job to run after Linux / BSD system reboot or system startup using @reboot Vixie cron macro.
Linux: Get Ubuntu Distribution Codename
Explains how to get the Ubuntu release codename such as trusty (14.04) and xenial (16.04) from the command line.
