# 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.