RHEL- Fix permission denied to sudo su command
Fix “sudo: Permission Denied” Error in Linux | Complete Troubleshooting Guide (RHEL/Ubuntu)
Are you getting the *“sudo: permission denied”* or *“cannot execute binary file: Exec format error”* in Linux?
In this video, we walk through a real-world troubleshooting scenario on Red Hat Enterprise Linux and show you step-by-step how to fix sudo issues.
🔍 What you’ll learn:
Why sudo stops working suddenly
Difference between *permission issue vs binary corruption*
How to check user groups (wheel/sudo)
Fixing sudoers file safely using visudo
Solving *Exec format error* by reinstalling sudo
Correct permissions for /usr/bin/sudo
Real troubleshooting demo
🛠 Commands covered:
groups, id, visudo
chmod, chown
dnf reinstall sudo
file /usr/bin/sudo
👨💻 Perfect for:
Linux beginners
System administrators
DevOps engineers
Anyone preparing for Linux interviews
📌 By the end of this video, you’ll be able to confidently diagnose and fix sudo-related errors in any Linux system.
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