UID stands for user identifier. A UID is a number assigned to each Linux user. It is the user’s representation in theLinux kernel. The UID is used for identifying the user within the system and for determining
The shell in the Linux operating system is used as a command line interpreter. It works between user input and Linux Kernel. The user’s requests are taken in the form of commands via the terminal that is passed to the Linux default shell, which tells the Linux Kernel to perform the spec...
It’s also easy to argue that Linux software makes life easy for system administrators because Linux is more reliable. It means you don’t need to closely watch your server every day; you can rely on it running without a problem. Also, because of the way Linux is built, you can often ...
If you check thecode for the passwd command, you’ll find that itchecks the UID of the userwhose password is being modified with the UID of the user that ran the command. If it doesn’t match and if the command wasn’t run by root, it throws an error. The setuid/SUID concept is...
What is sudo (su 'do')? Sudo is acommand-lineutility forUnixand Unix-based operating systems such asLinuxandmacOS. The utility provides an efficient way to temporarily grant users or user groups privileged access to system resources so that they can run commands that they cannot run under th...
Initializing the user-space. GRUB Features GRUB is a versatile and robust bootloader designed to support the requirements of modern operating systems. Below is the list of the essential GRUB features: Modular architecture. GRUB's modular design sidesteps the limitations of BIOS and allows it to of...
Linux is flexible, so it doesn't take much work to make su work similarly to sudo -- or vice versa. To run a single command as the root user with su, run the following command: su -c 'command' This is similar to running a command with sudo, but you'll need the root account's...
If you add sudo to the rm -rf command, you are deleting files with root power. That means you could delete system files owned byroot user. So, sudo rm -rf is a dangerous Linux command? Well, any command that deletes something could be dangerous if you are not sure of what you are...
sudo rm -rf <directory or file>Copy Below is a breakdown of each part of the command: sudo- elevates a user's privileges to the root user. Allows removing root-owned files and directories. rm- Linux command forremoving files or directories. ...
Related Dec 2, 2024 Ransomware Glossary 9m May 22, 2025 User Access Review (UAR) Glossary 7m Tags Admin RightsAdministrationAdministratorHighly PrivilegedLinuxmacOSRead Write ExecuteRootRoot AccessStandard Users