Create User Account A user is an entity, in a Linux operating system, that can manipulate files and perform several other operations. Each user is assigned an ID that is unique for each user in the OS. Linux is multiuser OS where multiuser features enable many people to have accounts on a single Linux system…
Reset/Recover Root Password Follow below procedure on how to break root password of CentOS 8. First, you need console access: Either at a keyboard and monitor locally, or via Virtual Machine remote console, you will need to see and interact with the bootloader. Reboot the machine: As soon as the bootloader comes up with the…
Subnetting Questions Solution
Monitoring System Performance: Lsof Command The lsof command is used in many Linux/Unix-like systems to display a list of all the open files and the processes. The open files included are disk files, network sockets, pipes, devices, and processes. One of the main reasons for using this command is when a disk cannot be unmounted…
Monitoring System Performance: TOP Command Linux Top command is a performance monitoring program that is used frequently by many system administrators to monitor Linux performance and it is available under many Linux/Unix-like operating systems. The top command is used to display all the running and active real-time processes in an ordered list and updates it…
Checking System Space (Df and Du Command) 1. Df: Df command shows the amount of disk space used and available on Linux file systems.It display the amount of disk space used by the specified files and for each subdirectory.df, which stands for Disk Filesystem, is used to check disk space. It will display available and…
Add User to administrative Group (Sudoer) The sudo command stands for “Super User DO” and temporarily elevates the privileges of a regular user for administrative tasks. The sudo command in CentOS provides a workaround by allowing a user to elevate their privileges for a single task temporarily. Login as Root user. Create new user using:…
Disk Partition Using Fdisk Command fdisk is a dialog-driven program for creation and manipulation of partition tables. It understands GPT, MBR, Sun, SGI and BSD partition tables. Fdisk can create a partition, delete a partition, change the partition type. This example shows how to add new hard disk on Virtual box and then partition this…
Basic Commands I This section describes Linux Command mostly used for beginners. pwd— When you first open the terminal, you are in the home directory of your user. To know which directory you are in, you can use the “pwd” It gives us the absolute path, which means the path that starts from the root. The…
