Fix "Permission Denied" in Linux

What it means

The "Permission denied" error happens when your user account does not have the required rights to access a file or run a command.

Common Causes

• File is owned by another user
• File is not executable
• Directory permissions block access

Fix 1 — Run with sudo

If the command requires administrator privileges:

sudo command_here

Example:

sudo apt update

Fix 2 — Make a file executable

If you are trying to run a script:

chmod +x script.sh

Then run it with:

./script.sh

Fix 3 — Check permissions

View file permissions with:

ls -l

Example output:

-rwxr-xr-x 1 user user file.sh

Fix 4 — Change ownership

If needed you can change ownership:

sudo chown user:user filename

Notes

• Be careful when using sudo.
• Incorrect permissions can break system files.