Input Output and Redirection What is File Descriptor? In Unix and related computer operating systems, a file descriptor (FD) is an abstract indicator used to access a file or other input/outp...

File and Directory Permissions After executing the command ls -l we have the following: drwx—— 35 ubuntu ubuntu 1120 Dec 27 19:54 Desktop -rwxrw-r– 65 ubuntu ubuntu 1120 Dec 28 18:36 test.txt l...

Links and Shortcuts in Linux commands: ln - create a hard link ln -s - create a symbolic (Soft) link (the same as Shortcuts in Windows) Hard links Vs Symbolic links Hard links and symb...

Working with Directory Linux Special Directories: . - The Current Directory .. - The Parent Directory / - The Root Directory ~ - The Current User’s Home Directory Absolute Path vs Rela...

Basic Linux Command ls - List Directories Content (in windows we call these as a folders) cd - Changes the current directories pwd - Displays the present working direct...

The Shell Theory What is The Shell ? A Shell provides you with an interface to the Unix system. It gathers input from you and executes programs based on that input. When a program finishes ex...

Linux Directory Structure / – root Every single file and directory starts from the root directory. Only root user has write privilege under this directory. Please note that /root is root us...

OpenCV 4.2.0 with CUDA 10.2 and Qt support Install dependencies sudo apt update sudo apt upgrade sudo apt install build-essential cmake pkg-config unzip yasm git checkinstall sudo apt install l...

Debug technique in C++ programming Brian Kernighan famously said, “Everyone knows that debugging is twice as hard as writing a program in the first place. So if you’re as clever as you can be when...