Root Cause Diagnosis
The sudo command not found error commonly occurs when the sudo package is absent from the Linux distribution, especially in minimal or fresh installations.
Simple Installation Steps
Resolve this by installing sudo with administrative privileges using the system's package manager.
- Switch to the root user with su -, entering the root password when prompted.
- For Debian or Ubuntu-based systems: Run apt update to refresh repositories, then apt install sudo.
- For Fedora, CentOS, or RHEL systems: Execute dnf install sudo or yum install sudo.
- For Arch-based systems: Use pacman -Sy sudo.
- Post-installation, add your user to the sudo group with usermod -aG sudo yourusername, replacing yourusername.
Configuration and Verification
Edit the sudoers file securely via visudo to confirm user permissions. Test sudo functionality with sudo --version or a simple command like sudo ls.
