January 31, 2023
While working in command terminal, we may want to re-enter a command we entered before. We can repeatedly press the up key on our keyboard until […]
January 10, 2023
Two types of variables exists in a Linux shell: Following command defines a shell variable: To convert a shell variable to environment variable following command can […]
December 13, 2022
chmod is an abbreviation for change mode, the command is used to change access rights of files and directories. Permissions are assigned to the three classes […]
October 18, 2022
Short answer is crontab. crontab files are used to schedule the execution of programs. The file contains instructions for cron daemon in the following simplified manner: […]
September 20, 2022
In Linux systems, /dev/null is a special file called the null device or also called the ‘blackhole‘, because it instantly discards anything written to it and […]
September 13, 2022
Device files are stored under /dev directory which operating system functions would not know how to access them. The mount command mounts a storage device or […]
August 2, 2022
First Stage Bootloader: Searches, loads and executes the MBR boot loader program. MBR(Master Boot Record): Located in the 1st sector of the bootable disk. It loads […]
May 3, 2022
Kernel modules must have at least two functions: a “start” (initialization) function called init_module() which is called when the module is insmoded into the kernel, and […]
