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Step-by-step tutorials and practical fixes for servers and systems.

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How to Fix Permission Denied in Linux

Fix permission denied errors step by step.

Real example

You try to upload or run a file and see "Permission denied". This means access is blocked even though the file exists.

Before you start

Access to Linux server

Basic terminal usage

sudo access if needed

Possible causes

Wrong file permissions

Wrong ownership

Parent directory blocked

Service user mismatch

Step-by-step instructions

1. Check permissions

ls -l file

2. Fix permissions

chmod 644 file

3. Fix ownership

chown user:user file

4. Check parent directory

Directory permission must also allow access.

Common mistakes

Using chmod 777 (unsafe)

Ignoring parent directory permissions

Environment tips

Shared hosting: use file manager

Server: use chmod/chown

Final check

Check permissions, ownership, and directory access together.